A base isolator for vibration isolation mounting of equipment, includes a pair of rigid (or relatively rigid) tubes, a flexible tube with slots between beams, and a pair of slitted plates. The rigid tubes and the flexible tube may be concentric. The slitted plates couple together ends of the tubes and provide vertical (axial) translational compliance. The flexible tube, which is outside or within the rigid tubes, provides horizontal translational compliance in directions perpendicular to an axis of the isolator. The base isolator, while providing compliance in all three translational directions, provides rotational stiffness, such as for rotational torques about the axis, and more generally for pitch and roll directions.
F16F 15/06 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with metal springs
F16F 15/073 - Suppression of vibrations of non-rotating, e.g. reciprocating, systemsSuppression of vibrations of rotating systems by use of members not moving with the rotating system using elastic means with metal springs using only leaf springs
F16F 3/02 - Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
H01Q 1/00 - Details of, or arrangements associated with, antennas
A moving target indicator radar system can include a radar transceiver. The system can further include processing circuitry. The processing circuitry can provide a command to move an antenna beam in an azimuth direction. The processing circuitry can further control the radar transceiver to transmit a series of pulses throughout antenna beam motion such that the series of pulses are assembled into Coherent Processing Intervals (CPIs) and such that for a possible target, sequential sets of CPIs are combined covering at least a 3 dB portion an azimuth beam. The processing circuitry can further detect at least one moving target in at least one CPI. Other apparatuses and methods are also described.
G01S 13/42 - Simultaneous measurement of distance and other coordinates
G01S 13/58 - Velocity or trajectory determination systemsSense-of-movement determination systems
G01S 13/72 - Radar-tracking systemsAnalogous systems for two-dimensional tracking, e.g. combination of angle and range tracking, track-while-scan radar
A system and method estimate an uncertainty of an artificial neural network. A topological uncertainty of the artificial neural network is determined by forming a bipartite graph between input and output nodes in a layer of the artificial neural network, and generating a persistence diagram as a function of the bipartite graph. A latent uncertainty of the artificial neural network is then determined, and the uncertainty of the artificial neural network is estimated as a function of the topological uncertainty and the latent uncertainty.
Multi-spring-loaded actuators can include a rotatable axis arranged to rotate relative to a fixed frame, and multiple loaded springs, each having a rotational potential and being operationally attached to the rotatable axis to cause the rotatable axis to rotate in a first direction (or a second direction) when its rotational potential is released (sequentially). Each loaded spring is associated with a one-time release mechanism operationally coupled to a respective loaded spring to retain the loaded spring with a potential until the one-time release mechanism is spent causing the loaded spring to release. By firing the one-time release mechanism and unloading loaded springs sequentially, a rotatable axis can move a first article relative to a second article, typically in a bi-directional manner.
A dual-mode roll/nod gimballed seeker is configured to provide an unobstructed path for a forming-warhead penetrator. A nod assembly includes first and second seekers separately offset from the roll axis whose FOV overlap within a stand-off range to a target. A roll gimbal rotates the dome and nod assembly around the roll axis. A nod gimbal rotates the nod assembly about a nod axis over a nod FOR that causes the seekers to cross the roll axis and obstruct a path along the roll axis. At terminal, the nod gimbal rotates the nod assembly to a nominal nod angle at which the path is unobstructed to detonate the forming warhead and project a penetrator along the path through the dome. This alleviates the need for a precursor charge and saves precious volume in the airframe, which is of particular import for small diameter warheads, in particular those having a diameter of no more than 8 inches.
F42B 12/10 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
F42B 15/01 - Arrangements thereon for guidance or control
A doorway is provided that includes a door frame, a door and a bumper. The door frame includes a passage, a header, a first jamb and a second jamb. The passage extends laterally between the first jamb and the second jamb. The passage extends vertically along the first jamb and the second jamb to the header. The door is configured to move between a closed position and an open position. The door closes the passage in the closed position. The door opens the passage in the open position. The bumper is configured to move between a deployed position and a stowed position. The bumper is disposed in the passage and covers a portion of the door frame in the deployed position.
A broadband ring resonator (300, 400, 500, 600, 601) including a substrate, a conductive trace on the substrate comprising a first end and a second end, wherein the conductive trace encloses an interior region except for a gap between the first end and the second end, and at least one radial stub (301, 401, 403, 501, 503, 505, 603, 605, 607, 609, 611, 613) integrated into the conductive trace and a method (700) of enhancing a bandwidth of a split ring resonator including acquiring a substrate, forming a conductive trace on the substrate comprising a first end and a second end, wherein the conductive trace encloses an interior region except for a gap between the first end and the second end, and integrating at least one radial stub (301, 401, 403, 501, 503, 505, 603, 605, 607, 609, 611, 613) into the conductive trace.
A projectile is integrally formed with a high-G shock isolator to isolate a protected device. The isolator includes a pattern of cut-outs formed around a circumference of a metal casing that defines flexures and supports and coupling paths that zigzag therethrough. Symmetry about the longitudinal axis of the projectile defines springs that are colinear with the principal axes of the projectile with a resonant frequency selected to attenuate shock inputs to levels acceptable to the protected device. The isolator is suitably provided with forward and aft stops to ensure isolator survivability. The aft stops are positioned in the cut-outs to prevent the flexures compressing beyond the yield strength of the casing material. The forward stop includes a structure rigidly attached behind the isolator that extends forward to engage a forward- facing surface of the isolator to prevent the flexures from stretching beyond the yield strength of the casing material.
F16F 1/02 - Springs made of steel or other material having low internal frictionWound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
F42B 15/36 - Means for interconnecting rocket-motor and body sectionMulti-stage connectorsDisconnecting means
An apparatus includes a dichroic combiner array (106) configured to combine multiple input optical beams (104) and generate an output optical beam (108). The dichroic combiner array includes multiple mirrors (112) and multiple dichroic filters (110). A first mirror is configured to reflect a first input optical beam towards a first dichroic filter, which is configured to combine the first input optical beam and a second input optical beam. A second mirror is configured to reflect a combined optical beam from the first dichroic filter to a second dichroic filter. A last dichroic filter is configured to generate the output optical beam. The apparatus also includes a beam dump array having multiple beam dumps (116) configured to terminate stray optical energy. The stray optical energy includes at least one of: (i) optical energy reflecting from at least one of the dichroic filters and (ii) optical energy transmitted through at least one of the dichroic filters.
A method of forming a convertible ink. The method includes: performing a polyol process with a metal salt, a capping agent and a solvent to produce encapsulated nanospheres in a first aqueous solution; reducing the amount of capping agent in the solution. The capping agent can be reduced by: adding solvent soluble with the capping agent and agitating the mixture via centrifugation to form a supernatant and a precipitate that includes the encapsulated nanospheres; removing the supernatant; adding a second solvent to the precipitate to form a second solution; agitating the second solution to form a second supernatant and a precipitate that includes the encapsulated nanospheres; and removing the second supernatant.
A video receiver receives a security level of a video source. The security level is stored in a blanking region of a video transmission. The video receiver compares the security level of the video transmission with a security level stored in the video receiver. The video transmission is processed as a function of the comparison of the security level of the video transmission with the security level of the video receiver.
H04N 21/4367 - Establishing a secure communication between the client and a peripheral device or smart card
H04N 21/44 - Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
H04L 9/12 - Transmitting and receiving encryption devices synchronised or initially set up in a particular manner
H04N 7/16 - Analogue secrecy systemsAnalogue subscription systems
G06F 21/84 - Protecting input, output or interconnection devices output devices, e.g. displays or monitors
H04N 21/454 - Content filtering, e.g. blocking advertisements
H04N 21/258 - Client or end-user data management, e.g. managing client capabilities, user preferences or demographics or processing of multiple end-users preferences to derive collaborative data
12.
INTEGRATED CABLE PACKAGING, DEPLOYMENT AND STRUMMING MITIGATION SYSTEM
A cable package for a line array and a method thereof including a first sheet of material, a cable wound in a serpentine shape, where a portion of the cable contacts the first sheet of material, and a second sheet of material attached to the cable and areas of the first sheet of material not occupied by the cable, wherein the areas of the second sheet of material attached to the first sheet of material not occupied by the cable comprises scoring lines to enable separation under tension to form a plurality of strumming mitigation fairings, and wherein the cable with scoring lines in the areas of the second sheet of material attached to the first sheet of material not occupied by the cable is folded onto itself.
A method includes performing (302) one or more behavioral tests (114) of software code. The method also includes, during the one or more behavioral tests, recording (304) interactions associated with the software code. The interactions include simulated incoming interactions to the software code and actual outgoing interactions from the software code. The method further includes converting (306) the interactions into contracts (604), where each contract includes information defining how at least one interaction involving the software code occurs. In addition, the method includes generating (308) one or more integration tests (116) for the software code based on the contracts. The one or more behavioral tests are configured to test functional behaviors of the software code. The one or more integration tests are configured to test integration of the software code with at least one external component.
An apparatus (100) includes an optical surface (106) configured to receive multiple input optical beams (304). The optical surface includes a grating (202) configured to diffract first portions of the input optical beams in a first direction to form a combined optical beam (308). The grating is also configured to reflect second portions of the input optical beams in a second direction. The optical surface also includes a reflective surface (204) at least partially surrounding the grating. The reflective surface is configured to reflect third portions of the input optical beams in the second direction.
G02B 6/293 - Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
G02B 27/09 - Beam shaping, e.g. changing the cross-sectioned area, not otherwise provided for
In accordance with at least one aspect of this disclosure, a product identification and tracking interface system includes an interface unit. The interface unit includes an input/output configured and adapted to be coupled to at least one of a tracking system or an identification system, a memory configured to store instructions, and a processor disposed in communication with said memory. The processor upon execution of the instructions is configured to receive a trigger command from a tracking system, send a read command to an identification system, receive a respective identifier from the identification system, package the respective identifier into a packaged identifier in a format readable by the tracking system, and send the packaged identifier to the tracking system.
A method of operation is provided during which a plurality of hardware devices of a computer are disabled on a firmware level during a reboot of the computer in response to receiving a disable command prior to the reboot. A validation is run to determine whether or not the hardware devices are disabled. A validation signal is provided indicative of whether or not the hardware devices are validated as being disabled.
G06F 21/50 - Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
G06F 21/57 - Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
G06F 21/82 - Protecting input, output or interconnection devices
A munition has an explosive charge with direction explosive characteristics, such as a nonuniform detonation velocities. The explosive charge may have multiple portions of explosives with nonuniform characteristics, and/or may have portions with graded nonuniform characteristics. The explosive charge may be used to propel a material from the munition in a desired manner. For example the material may be fragments that are part of a fragmentation munition. Alternatively the material may be a layer of a material, such as a metal, that produces an explosively formed penetrator or shaped charge. The explosive charge may be configured to control the spread and/or direction of the material to be propelled from the munition.
A reimaging lens assembly (100, 200, 300) includes a pentaprismatic optic (10) that includes two reflective surfaces (12, 14) and two refractive surfaces (16, 18). The reflective surfaces are powered surfaces, and the reflective surfaces may be spherical, aspherical, and/or freeform reflective surfaces. The pentaprismatic optic may receive light (22) from a wide field of view (WFOV), and may change the angle of the output light from that of the input light, for example by 90 degrees. The pentaprismatic optic may be coupled to an image receiver (116), such as a cooled or uncooled camera (130, 220, 230). The reimaging lens assembly may include further optical elements between the pentaprismatic optic and the image receiver, such as one or more lenses (102-106, 310), filters (114), and/or cold stops (112). The lens assembly provides a compact system, with a small number of optical elements, and with desensitized output that reduces image jitter.
An asymmetric ERA box improves the disruption of a shape-charge jet for a high-explosive projectile for a given mass requirement and stand-off distance. Mass is asymmetrically redistributed from the outer plate to the rear plate in the form of increased thickness of the rear plate. This is offset by forming the outer plate of a low-density material that provides an impedance mismatch sufficient to attenuate the shockwave of low velocity projectiles (e.g., 50 caliber bullets) so that they embed in but do not detonate the explosive. The outer plate provides negligible disruption of the shape-charge jet with substantially all the disruption being provided by the thicker high density rear plate. Placement of substantially all the mass toward the front of the shape-charge jet improves overall performance of the ERA. This asymmetric configuration provides the same performance as known symmetric ERA configurations against kinetic-energy projectiles as the total mass in the outer and rear plates remains essentially the same.
A printed circuit board comprises a support structure (302), a conductive layer (304) operably coupled to the support structure, a mask structure (507) formed on the conductive layer, and a cover layer (508). The conductive layer comprises first and second portions (304A, 304B) of conductive material separated by a gap (608) that defines a spacing between the first and second portions that does not contain conductive material. The mask structure defines first and second regions on the conductive layer. The first region is enclosed by a first boundary defined by the mask structure and includes the gap. The second region lies outside of the first boundary. The cover layer is sized to fit within the first region and comprises a laminatible insulating material that flows within the first region during lamination. During lamination, the first boundary prevents the laminatible insulating material from flowing into the second region, and the laminatible insulating material flows to fill the gap.
H01Q 1/40 - Radiating elements coated with, or embedded in, protective material
H01P 3/02 - WaveguidesTransmission lines of the waveguide type with two longitudinal conductors
H01P 11/00 - Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
H01Q 1/00 - Details of, or arrangements associated with, antennas
H01Q 1/38 - Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support
H01Q 13/08 - Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
H05K 3/06 - Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding the conductive material being removed chemically or electrolytically, e.g. by photo-etch process
H05K 3/10 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
A vacuum insulation layer is wrapped around the length of a warhead to thermally insulate the warhead from fire or aerodynamic heating. The vacuum insulation layer may be integrally formed into the warhead casing or provided as a sleeve that may be permanently or removably positioned about the warhead casing. The vacuum insulation layer is held under vacuum with a pressure of less than 25 Torr and a thermal conductivity Tcond vac of less than one-third of the thermal conductivity of air Tcond air.
A heavy inert gas insulation layer is wrapped around the length of a warhead to thermally insulate the warhead from fire or aerodynamic heating. The insulation layer may be integrally formed into the warhead casing or provided as a sleeve that may be permanently or removably positioned about the warhead casing. The insulation layer contains an inert gas such as Argon, Krypton, Xenon or a synthetic gas having a density of at least 1.5 kg/m3 and a thermal conductivity Tcond_gas no greater than two-thirds of the thermal conductivity of air Tcond _air.
F42B 12/20 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type
F42B 12/22 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction
F42B 12/32 - Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of high-explosive type with fragmentation-hull construction the hull or case comprising a plurality of discrete bodies, e.g. steel balls, embedded therein
F42B 39/14 - Explosion or fire protection arrangements on packages or ammunition
A clamping device (16) for securing a first component (12) to a second component (14) is disclosed. The clamping device includes a mounting flange (18) coupled to the first component, a mounting seat (24) coupled to the second component, and a clamping ring (22) configured to be rotatably seated on the mounting flange such that the mounting flange is disposed axially between a first end of the clamping ring and the mounting seat upon assembly. The mounting seat includes a plurality of first locking ramps disposed about a circumference of the mounting seat and extending radially outward from the mounting seat. The clamping ring includes a plurality of second locking ramps (68) disposed about an inner circumference and extending radially inward from a second end of the clamping ring. The plurality of second locking ramps is configured to engage the plurality of first locking ramps upon securing the first component to the second component.
An event detection system response controller for an electrical system includes at least one event detector (ED) digital filter submodule having a signal input and a signal output. The at least one ED digital filter submodule is configured to receive at least one event signal output from one or more event detectors at the signal input. Each of the at least one ED digital filter submodule includes a signal synchronizer, a signal filter, an interface validator, an interface validation filter, and a pulse shaper sequentially arranged from the signal input to the signal output.
An insulated blast tube includes an insulating layer of a burn resistant material such as phenolic resin formed on an interior surface of the blast tube to provide the necessary erosion and thermal insulation properties to protect the blast tube and a heavy inert gas insulated layer formed in the walls of the blast tube itself to provide the additional thermal insulation properties to protect any non-propulsive sub-systems positioned in the void space around the blast tube. A void space in the walls of the blast tube contains an inert gas such as Argon, Krypton, Xenon or a synthetic inert gas having a density of at least 1.5 kg/m3 and a thermal conductivity Tcond_gas of no greater than two-thirds the thermal conductivity of air Tcond_air to form the heavy inert gas insulation layer.
A vacuum insulated blast tube (200) includes an insulating layer (206) of a burn resistant material such as phenolic resin formed on an interior surface of the blast tube to provide the necessary erosion and thermal insulation properties to protect the blast tube and a vacuum insulation layer (208) formed in the walls of the blast tube itself to provide the additional thermal insulation properties to protect any non-propulsive sub-systems positioned in the void space around the blast tube. A void space (204) in the walls of the blast tube is held under vacuum with a pressure of less than 25 Torr and a thermal conductivity Tcond _vac of less than one-third of the thermal conductivity of air Tcond_air to form the vacuum insulation layer.
A method for making a brushless DC motor includes the steps of: applying coils to a plurality of teeth that extend radially outwardly from an inner ring; mounting an outer ring to radially outer ends of the plurality of teeth; and removing segments of the inner ring.
H02K 15/02 - Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
H02K 15/06 - Embedding prefabricated windings in the machines
H02K 15/095 - Forming windings by laying conductors into or around core parts by laying conductors around salient poles
28.
DEVICE FOR AND METHOD OF FREQUENCY TESTING PRINTED CIRCUIT BOARD UNDER THERMAL STRESS
A printed circuit board (PCB) test system and method including temperature chamber including at least one slot to accommodate at least one PCB test coupon, input bus connected to inputs of the at least one slot, and output bus connected to outputs of the at least one slot, wherein temperature chamber is configured to apply a temperature to the at least one PCB test coupon; signal generator including output bus connected to the input bus of the at least one slot, frequency meter comprising an input bus connected to the output bus of the at least one slot and an output bus, and a comparator connected to the output bus of the signal generator and the output bus of the frequency meter for comparing corresponding outputs of the signal generator and the frequency meter.
Devices, systems, and methods for image processing; wherein a method can include generating a synthetic image based on the 3D point set of a same geographical region as the 2D real image and performing a coarse registration to grossly register the synthetic image to the 2D real image, the coarse registration including determining, for a plurality of synthetic image tiles that span the synthetic and at each of a plurality of offsets in a search region, a correlation score resulting in a plurality of correlation score arrays, determining a weighted combination of scores in the correlation score arrays resulting in a combined correlation score array, identifying an offset of the plurality of offsets based on the combined correlation score array, and moving the synthetic image relative to the 2D real image by the identified offset.
A method of tuning a circuit includes measuring an electrical characteristic of the circuit and forming, by an automated process, a conductive trace connected to the circuit to adjust the electrical characteristic of the circuit. The steps of measuring the electrical characteristic and forming the conductive trace are conducted simultaneously. The automated process involves adjusting a physical characteristic of the conductive trace in real-time in response to results of measuring the electrical characteristic of the circuit until the electrical characteristic of the circuit complies with a selected criterion.
H05K 1/09 - Use of materials for the metallic pattern
H05K 3/10 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
H05K 3/12 - Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using printing techniques to apply the conductive material
H05K 3/22 - Secondary treatment of printed circuits
An antenna system comprises a reflector subsystem, a rotatable support structure and a support member. The reflector subsystem receives an input beam and reflects the input beam to produce an output beam steered in elevation by an elevation reflector and in azimuth by an azimuth reflector, towards a target. The rotatable support structure is operably coupled to the azimuth reflector and to the elevation reflector and is configured to rotate them simultaneously. The support member comprises a lengthwise portion coupled to the rotatable support structure and an offset portion coupled to the elevation reflector, the offset portion configured to offset the elevation reflector from the lengthwise portion. The offset portion is configured to enable clearance of the elevation reflector during beam steering of the output beam to extreme ends of a range of motion of the elevation reflector.
F41H 13/00 - Means of attack or defence not otherwise provided for
H01Q 1/32 - Adaptation for use in or on road or rail vehicles
H01Q 3/06 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation over a restricted angle
H01Q 3/08 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
H01Q 19/13 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination
H01Q 19/18 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
H01Q 19/19 - Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
A test assembly and method for performing a shock test of an article includes a pneumatic gun assembly, a Hopkinson bar assembly, a magnetic catch, and a support assembly. The support assembly suspends the article in alignment with the magnetic catch. The magnetic catch retains the article against the Hopkinson bar assembly. The pneumatic gun assembly includes a striker for propagating a shock through the Hopkinson bar assembly into the article.
An electro-mechanical tool includes a handheld housing, an electrical cable, and an electro-mechanical head. The electro-mechanical head includes an electrical connector and a tool subassembly. The electrical connector includes pins, each pin connected to a lead of the electrical cable. The tool subassembly includes a bit attached to a cap, which is distally located relative to the electrical connector. The bit can be employed to remove the access cover of an electrical receptacle in the body of a munition such as a missile. The electrical connector can be adapted to transfer power and data to the munition via the electrical receptacle.
H01R 13/24 - Contacts for co-operating by abutting resilientContacts for co-operating by abutting resiliently mounted
H01R 13/52 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
H01R 24/38 - Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
H01R 24/86 - Parallel contacts arranged about a common axis
Systems and methods for measuring acoustic wave vectors in a fluid is presented, a system comprising: a first camera configured to be placed in the fluid; a second camera configured to be placed in the fluid; a light source configured to be placed in the fluid; and a controller configured to: control the first camera; control the second camera; control the light source; process images provided by the first camera and second camera to determine an acoustic wave vector.
G01P 5/20 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the time taken by the fluid to traverse a fixed distance using particles entrained by a fluid stream
G01P 5/26 - Measuring speed of fluids, e.g. of air streamMeasuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring the direct influence of the streaming fluid on the properties of a detecting optical wave
A method for electro-optic modulation of an RF signal to produce a single-sideband reduced-carrier phase-shifted (SSB-RC-PS) modulated signal includes: receiving (302) an optical carrier signal (106, 236); receiving (304) the RF signal (RF In, RF_in); modulating (306) the RF signal with a first portion of the optical carrier to produce a single sideband (SSB) modulated signal (110, 237); amplitude and phase modulating (308) a second portion of the optical carrier signal and combining (308) with the modulated signal to produce a first combined signal (124, 241), the amplitude modulation and phase modulation of the second portion of the optical carrier signal dynamically controlled to directly match the amplitude and inversely match the phase of the modulated signal; and amplitude modulating and phase modulating (310) a third portion of the optical carrier signal and combining (310) the third portion with the first combined signal to produce a second combined signal (Optical Out, RF_out), the product of which is a single sideband reduced carrier phase shifted (SSB-RC-PS) modulated signal.
An apparatus includes a seed laser (102) configured to generate a seed signal and a modulator (202) configured to modulate the seed signal and generate multiple sideband signals. The apparatus also includes multiple injection-locked lasers (210, 214) configured to generate multiple optical signals based on different ones of the sideband signals. The apparatus further includes a combiner (216) configured to combine the optical signals and generate a combined optical signal. In addition, the apparatus includes a feedback loop configured to modify frequencies of the sideband signals generated by the modulator so that the optical signals generated by the injection-locked lasers have a desired frequency difference. The feedback loop may be configured to perform photonic down-conversion of a portion of the combined optical signal prior to photodetection in order to decrease a frequency of a signal that undergoes photodetection.
An additively-manufactured electrical transmission line is made as a single, unitary continuous monolithic additively-manufactured piece of material, including an outer housing defining a cavity therewithin, a conductive stripline passing through the cavity, and stubs within the cavity electrically coupling the outer housing to the stripline. The stripline may be a flat stripline. The stubs may be angled relative to the stripline, to facilitate surface treatment within the housing, such as abrasive flow machining to reduce surface roughness, which may be part of a method of making the electrical transmission line. The electrical transmission line may be part of an electrical installation including multiple such electrical transmission lines, which may have shapes, including curved shapes, for making desired electrical connections between components.
A mechanism secures and then deploys a rotationally coupled rigid member to and from a frame. One end of a curved member is pinned to the rigid member and the other end is on or in a reaction guiding element. In a closed state, the curved member is straightened from its originally manufactured or "free state" curvature and the other end is secured to the frame via a latch mechanism. The tension in the straightened curved member serves to preload the rigid member against the frame. To move to an open state, the latch mechanism is released allowing the other end of the curved member to move with or within the reaction guiding element along a constrained path towards its free state curvature. The curved member reacts against the frame, the pinned end in the rigid member and the reaction guiding element to rotate the rigid member away from the frame.
A method is provided to form a security barrier of an electronic device under protection (104). The method includes depositing a transformable dielectric material layer (102) on the electronic device under protection (104), and converting a target portion of the transformable dielectric material layer into at least one electrical circuit structure (110, 111) having at least one measurable electrical characteristic. The method further includes depositing a thermal stabilizing material layer (112) onto the transformable dielectric material layer (102).
A system includes a main power source (102) configured to provide power to at least one pulsed electrical load (114). The system also includes a propulsion converter (202) configured to drive a propulsion motor (204). The system further includes a controllable-field induction electrical machine (116, 224) coupled to the at least one pulsed load. The controllable-field induction electrical machine is configured to suppress one or more propulsion current harmonics generated by the propulsion converter that affect the at least one pulsed load.
A nanocomposite optical ceramic (NCOC) material includes a plurality of coated (core-shell) nanoparticles having nanoparticles of a first material coated with a coating of a second material. The first material and the second material are mutually insoluble and each have a transmissivity of at least 80% for an intended wavelength. The first material and the second material have a difference in index of refraction of less than 25%. The first material and second material have grains with a diameter of less than 1I20th the intended wavelength. The coating of the second material on the nanoparticles of the first material is up to 50 nm thick. The NCOC contains no more than 0.01% voids per unit volume.
C04B 35/505 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare earth compounds based on yttrium oxide
C04B 35/547 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on sulfides or selenides
C04B 35/581 - Shaped ceramic products characterised by their compositionCeramic compositionsProcessing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxides based on borides, nitrides or silicides based on aluminium nitride
System and method for prediction and avoidance of RF interference for a satellite (102) from one or more of resident space objects (RSOs) (104) includes: obtaining (602) orbit data (202) and transmission data (204) for the satellite and the plurality of RSOs; calculating (604) a visibility window (304); performing (606) comparison of transmission parameters; calculating (608) an orientation of each of the RSOs; when there is a match of transmission parameters and the orientation is within a predetermined threshold, adding (610) the compatible RSO to a compatible RSO list; generating (612) a course of action (COA); scoring (614) each of the compatible RSO; selecting (616) a best scored COA; scheduling (618) the first course of action; and autonomously executing (620) the first course of action by the satellite to avoid RFI.
A shock testing apparatus includes a tower extending upward from a base. The tower includes a guide extending down the tower. A strike plate assembly includes a strike plate positioned below the guide for receiving mechanical shock from a striker striking out from the guide. A tri-axial accelerometer is mounted to the strike plate for data acquisition of three-dimensional shock wave acceleration data. A method of mechanical shock testing components includes dropping a striker onto a strike plate on which is mounted a unit under test (UUT) to generate three-dimensional shock waves through the strike plate. The method includes acquiring data indicative of acceleration in three orthogonal directions in at least one of the strike plate or UUT for a single drop of the striker.
G01N 3/303 - Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force generated only by free-falling weight
44.
MULTI-PORT SUBSEA HIGH-VOLTAGE POWER MODULATION AND STORED ENERGY DISTRIBUTION SYSTEM
A system includes multiple electrical nodes (110a-110c, 200, 310a-310c, 600, 700, 1001-1004, 1203) connected in series to a primary power source (102, 1010) via transmission lines (116a-116c, 316a-316c, 1005-1008). Each node includes a power converter (122a-122c, 204, 322a-322c, 606, 706) that can receive first power from the primary power source or another upstream node. The power converter can change a voltage level and/or a frequency of the first power. Each node also includes a high-speed synchronous rotating machine (HSRM) (118a-118c, 206, 318a-318c, 608, 708), which includes an inertial storage flywheel (120a-120c, 211, 320a-320c), a rotating excitation assembly (208, 404), stator windings (S1-S3), and a synchronous motor (402) coupled to an induction generator (408, 624, 724). The HSRM can boost a voltage level between an input and output to compensate for a voltage drop of the first power. At least one of the nodes further includes an inductive power coupler (326) to electrically couple the node to a mobile power source (324, 636) that provides second power to the node and receives a portion of the first power from the node using contactless inductive power transfer. The system includes a combination of AC and DC power transmission techniques and associated bidirectional power converters.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 4/00 - Circuit arrangements for mains or distribution networks not specified as ac or dc
H02J 7/14 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
H02J 50/10 - Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
H02M 5/34 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by dynamic converters using mechanical contact-making and -breaking parts
45.
DYNAMIC MODULATOR BIAS CONTROLLER WITH CONTINUOUS WAVEFORM CHARACTERIZATION VIA TWO OR MORE BIAS POINTS
A communication system includes a laser that generates a laser light and a modulator that includes a modulation element configured to modulate the laser light with an input signal based on a bias voltage to produce an output signal. Control circuitry provides the bias voltage to a bias input of the modulation element and is configured to maintain a bias lock on at least two bias points of the modulation element during operation. The control circuitry is programmed to perform a bias lock operation that includes performing an initial voltage sweep on the modulation element and establish initial bias values for the at least two bias points. The circuit also providing a bias waveform to the bias input of the modulation element that varies over time and contains identifiable dither tones, determines harmonic power at the at least two bias points; and varies the bias waveform to determine harmonic power until the harmonic power is minimized to establish a bias lock with locked bias values.
G02F 1/01 - Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulatingNon-linear optics for the control of the intensity, phase, polarisation or colour
H01S 5/0683 - Stabilisation of laser output parameters by monitoring the optical output parameters
A Ground Truth Map (GTM) is defined, generated for a local scene and then used to enforce real-time data transmission compliance. Data, and specifically imagery of disallowed objects in the local scene, may pose a risk for "spillage" (e.g., accidental storage or transmission) at multiple points in the process. Techniques for defining the GTM, handling the session data used to generate the GTM and for using the GTM alone or in combination mitigate the risk of spillage.
To prevent the transmission of excluded data, a short time-delay between capture and transmission of a video signal is exploited to process the buffered frames to recognize disallowed objects and control the video camera to prevent transmission of any frame including the disallowed object in the video signal. The time-delay can be implemented in real or near real time with, for example, a delay line or memory chip that serve to buffer the sequence of image frames.
Methods and apparatus for an antenna (300) having first and second nested monopoles (302, 304) each having arms (306a-f, 316a-f) with bends (312, 318). In some embodiments, the monopoles are offset in clocking angle. In some embodiments, the monopoles are aligned in clocking angle. In embodiments, the bends in the arms may be located at half a total height of the antenna.
H01Q 5/40 - Imbricated or interleaved structuresCombined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
H01Q 9/42 - Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
H01Q 9/44 - Resonant antennas with a plurality of divergent straight elements, e.g. V-dipole, X-antennaResonant antennas with a plurality of elements having mutually inclined substantially straight portions
A cold plate is disclosed for cooling electronics within a missile. The cold plate includes a housing enclosing a compartment. An outlet manifold is inside the compartment. A wick is inside the compartment and is adjacent to the outlet manifold. A liquid inlet is fluidically connected to the wick. A vapor outlet fluidically connects the outlet manifold to atmosphere or space.
A power management unit architecture including a set of batteries connected to a load via a bus; a controller in operative communication with the batteries; a telemetry unit in operative communication with the controller and the batteries; at least one power switch in operative communication with the controller, the batteries and the bus; a squib unit operatively connected to the batteries; wherein the controller is configured to pull a battery current from a first battery and drive the first battery current into a second battery responsive to a predetermined current.
An apparatus includes at least one axial flux electric machine (26A). Said electric machine includes a plurality of stators (32A) and a rotating assembly (30A) including a plurality of axially disposed rotors (36A) on a shaft (34A) being rotatable about an axis (38A). Each of said rotors (36A) includes a plurality of rotor magnet poles (44). Said stators (32A) are axially interspersed with the rotors (36A) along the axis (34A). Each of said stators (32A) includes a plurality of stator magnet poles (64). Said stator magnet poles of each of the stators (32A) have a non-annular or non-axisymmetric configuration, thus are asymmetrically arranged.
H02K 21/24 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
H02K 1/2798 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the stator face a rotor
H02K 1/2796 - Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
A passive optically athermal infrared reimaging objective lens assembly (10) includes a lens housing (12) fabricated from a single material or materials having similar coefficients of thermal expansion. The lens assembly (10) further includes an imager lens group (20) supported by the lens housing (12). The imager lens group (20) is positioned within the lens housing (12) toward a scene and including multiple lenses (30, 32, 34, 36) having a positive refractive power. The lens assembly (10) further includes a relay lens group (22) supported lens housing (12). The relay lens group (22) is positioned behind the imager lens group (20) and including two lenses (38, 40) having a positive refractive power. The lens assembly (10) further includes a cold stop (24) positioned behind the relay lens group (22) and a detector (26) positioned behind the cold stop (24) and configured to detect an image.
G02B 7/02 - Mountings, adjusting means, or light-tight connections, for optical elements for lenses
G02B 9/62 - Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or – having six components only
G02B 13/14 - Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
A power management unit having battery switchover topology including a first battery in operative communication with a first battery first power switch in parallel with a first battery second power switch, and in operative communication with a first battery power dump unit; a second battery in operative communication with a second battery first power switch in parallel with a second battery second power switch, and in operative communication with a second battery power dump unit; an nth battery in operative communication with an nth battery first power switch in parallel with an nth battery second power switch; the first battery, the second battery and the nth battery are connected to a bus that supplies an electrical load; and the electrical load being supplied sequentially by a first battery current from the first battery, a second battery current from the second battery, and an nth battery current from the nth battery.
A battery staging system including a first and second battery in operative communication with each other and an electrical load; a boost controller in operative communication with the first and second battery; an inductor in operative communication with the boost controller, the first battery, a ground and the second battery; the inductor connected between first battery and ground for a predetermined time to obtain an inductor current; the boost controller is configured to pull a first battery current and drive it into the second battery responsive to the predetermined inductor current; the inductor being connected to the second battery responsive to the inductor obtaining the predetermined inductor current; the inductor is reconnected between the first battery and the ground before the inductor current reaches zero; and the boost controller configured to pull the first battery current from the first battery until the first battery voltage reaches a target voltage.
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H01M 6/36 - Deferred-action cells containing electrolyte and made operational by physical means, e.g. thermal cells
H01M 10/39 - Accumulators not provided for in groups working at high temperature
H02M 3/156 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
A power management unit having battery switchover topology including a first battery in operative communication with a first battery first power switch in parallel with a first battery second power switch, and in operative communication with a first battery power dump unit; a second battery in operative communication with a second battery first power switch in parallel with a second battery second power switch, and in operative communication with a second battery power dump unit; an nth battery in operative communication with an nth battery first power switch in parallel with an nth battery second power switch; the first battery, the second battery and the nth battery are connected to a bus that supplies an electrical load; and the electrical load being supplied sequentially by a first battery current from the first battery, a second battery current from the second battery, and an nth battery current from the nth battery.
A conformal antenna device is provided that includes a conformance panel, an antenna array, a combiner board, and a plurality of slats. The conformance panel has an inner radial surface, an outer radial surface, a width extending between first and second axial ends, and a length extending between first and second lateral ends. The conformance panel extends linearly in a widthwise direction and extends arcuately in a lengthwise direction. The conformance panel includes a plurality of apertures extending between the inner and outer radial surfaces. The antenna array is attached to the outer radial surface. The slats extend between the combiner board and the conformance panel in a spoke arrangement. Each slat includes a first plate and a second plate, and each second plate includes electrical circuitry and one or more components and is in signal communication with the antenna array.
H01Q 21/06 - Arrays of individually energised antenna units similarly polarised and spaced apart
H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path
H01Q 5/25 - Ultra-wideband [UWB] systems, e.g. multiple resonance systemsPulse systems
57.
METHOD OF FORMULATING AN ACTIVE ICE-REPULSING NANO-FILLED COATING
An article transparent to radiofrequency (RF) signals includes a substrate and a coating arrangement on the substrate. The coating arrangement includes a primer applied to and in physical contact with the substrate, a topcoat applied to and in physical contact with the primer layer, the topcoat including an organic polymer material, and nanoparticles dispersed throughout one of the primer and the topcoat. A content of the nanoparticles ranges from 0.1 wt% to 10 wt%.
A semiconductor device is provided and includes a miscut substrate, intermediate layers epitaxially grown on the miscut substrate such that an uppermost surface of the intermediate layers includes surface steps, segmented active regions including nanowire channels, each of which is epitaxially grown on a corresponding one of the surface steps and a cap layer epitaxially grown on the nanowire channels and exposed portions of the uppermost surface.
A variable buoyance engine includes a pressure vessel, a reservoir, an external bladder, a non-compressible fluid inside the reservoir and the external bladder, and a drive system. The drive system includes a shape memory alloy actuator, a piston attached to the actuator, a power source connected to the actuator, and a controller configured to control application of power to the actuator. The power source is configured to cause the actuator to change temperature and deform when power is applied to the actuator thereby moving the piston from a first position to a second position. The reservoir and external bladder are configured to retain, without leakage, the non-compressible working fluid. The external bladder is configured to receive the non-compressible working fluid from the reservoir when the actuator moves the piston from a first position to a second position to create a second, positive buoyancy state and to expel the non-compressible working fluid from the external bladder to the reservoir when the actuator moves the piston from the second position to the first position to create a first, negative buoyancy state.
A circuit comprises an amplifier (706) and a bias circuit. The amplifier (706) comprises an output transistor comprising a source electrode, a drain electrode, and a gate electrode. The bias circuit comprises: a first control loop configured to set a first quiescent bias for the output transistor based on a first value of a first control voltage and a second value of a second control voltage, wherein the first quiescent bias is configured to put the output transistor in an on state; and a second control loop configured to set a second quiescent bias for the output transistor based on the first value of the first control voltage and the second value of the second control voltage. The second quiescent bias is configured to put the output transistor in an off state and to increase an insertion loss of the amplifier when the output transistor is in the off state.
H03F 3/72 - Gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
H03F 1/02 - Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H03F 1/22 - Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of cascode coupling, i.e. earthed cathode or emitter stage followed by earthed grid or base stage respectively
H03F 3/19 - High-frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
H03F 3/24 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
Described herein is a stacked patch antenna, an array of stacked patch antennas, and a method of fabricating a stacked patch antenna. The stacked patch antenna comprises a ground plane, a first substrate on the ground plane, a first patch on the first substrate having a first diagonal non-radiating center slot from a side of the first patch, a second substrate on the first patch, a second patch on the second substrate having a second diagonal non-radiating center slot from a side of the second patch similar to the side of the first patch, and a feed connector having a first conductor directly connected to the ground plane and a second conductor capacitively connected to the first patch and directly connected to the second patch.
H01Q 21/20 - Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path
62.
CATHODE-IN-CATHODE HIGH-POWER MICROWAVE VACUUM TUBE SOURCE AND METHOD OF ALIGNMENT
A high-power microwave (HPM) vacuum tube source and method of precise coaxial alignment of the field emission (FE) cathode, cylindrical RF generating tube and magnet field includes positioning a low-power thermionic emission (TE) cathode inside the FE cathode in a "cathode-in-cathode" arrangement. With the HPM source under vacuum and the FE cathode deactivated, the TE cathode emits a surrogate electron beam through the generating tube. Measurement circuits measure the surrogate electron beam's position with respect to a longitudinal axis fore and aft of the generating tube. The measurements circuits may, for example, be a repositionable fluorescent target or electric field sensors embedded in the cylindrical RF generating tube. The coaxial alignment of the primary cathode, cylindrical RF generating tube and magnet is adjusted until the position of the surrogate electron beam satisfies a coaxial alignment tolerance.
H01J 23/065 - Electron or ion guns producing a solid cylindrical beam
H01J 23/07 - Electron or ion guns producing a hollow cylindrical beam
H01J 25/34 - Travelling-wave tubesTubes in which a travelling wave is simulated at spaced gaps
H01J 25/42 - Tubes in which an electron stream interacts with a wave travelling along a delay line or equivalent sequence of impedance elements, and with a magnet system producing an H-field crossing the E-field
63.
WINGED STORE MECHANICAL CAPTURE INTERFACE FOR USE WITH AN AIRCRAFT
A store-side mechanical interface includes attachment features formed in a wing base(s) on opposite sides of a store Cg for securing an expendable aircraft store with fixed or foldable wings to an aircraft in capture carriage and releasing the expendable aircraft store therefrom. The mechanical interface does not add mass, require additional volume or have an aerodynamic drag penalty and can withstand the large forces placed on it during operation of the aircraft. During captive carriage, the attachment features formed in the wing base are revealed for mechanical engagement with a complementary attachment feature on the aircraft. Upon release, the attachment features are either positioned aft of a wing base or covered by movement of a portion of a wing such that the first and second attachment features do not impede air flow over the store.
B64D 7/02 - Arrangement of military equipment, e.g. armaments, armament accessories or military shielding, in aircraftAdaptations of armament mountings for aircraft the armaments being firearms
B64D 7/06 - Arrangement of military equipment, e.g. armaments, armament accessories or military shielding, in aircraftAdaptations of armament mountings for aircraft the armaments being firearms movably mounted
A Permanent Magnet Synchronous Motor (PMSM) includes a hollow cylindrical stator with stator windings and a magnetic rotor having M pole pairs arranged to rotate around a rotational axis in the stator by a rotor shaft. The stator windings are energized to generate a magnetic rotational field in dependence upon the rotational position of the magnetic rotor. Two or more analog magnetic flux sensors are positioned within the hollow cylindrical stator and arranged concentrically with respect to the rotational axis around the stator at a constant mechanical angle equal to a constant electrical angle divided by M relative to each other. The magnetic flux sensors are spaced directly from the magnetic rotor by a radial gap (X) in such a way that the magnetic flux of the magnetic rotor impinges on the analog magnetic flux sensors without obstruction to output two or more sinusoidal signals with phases separated by the constant electrical angle that can be evaluated to determine the rotational position of the magnetic rotor. Sensor integration eliminates the additional sense magnet, Hall sensors and CCA positioned external to the motor housing to provide a smaller motor package at lower cost. Integration also facilitates the use of the PMSM in high-temperature or high-shock (high g) environments such as gun-launched guided projectiles or hypersonic missiles.
H02K 11/215 - Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
H02K 29/08 - Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates or magneto-resistors
H02P 6/16 - Circuit arrangements for detecting position
A circuit and method for calibrating ADCs and DACs generates a calibration signal by a DAC; filters spurs from the calibration signal from the DAC to generate a filtered calibration signal; calculates ADC interleave calibration factors to improve performance metrics of the ADC, responsive to the filtered calibration signal; receives the calibration signal from the DAC and calculates DAC interleave calibration factors; generates a calibration signal with improved performance metrics, responsive to the DAC interleave calibration factors received from the ADC; and repeats the process until the performance of the ADC and DAC are within a predetermined range.
Methods and apparatus for a radar system having an array including a series of concentric rings of array elements, wherein the concentric rings that have a shape defined by respective ellipses that increase in size from a center that is common to the respective ellipses. The series of concentric rings can include multiple groups of the concentric rings, wherein the concentric rings in each successive group are larger in size than the concentric rings in the first group.
G01S 13/02 - Systems using reflection of radio waves, e.g. primary radar systemsAnalogous systems
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
A dielectric encapsulated metal lens includes a planar conductive plate with a first surface and a second surface, wherein the first surface is parallel to the second surface; a plurality of openings from the first surface through the planar conductive plate to the second surface, wherein a longitudinal axis of each opening is perpendicular to the first surface and the second surface, wherein a size of each opening is a function of a position of said each opening on the planar conductive plate; and a dielectric material encapsulating the planar conductive plate and filing the plurality of openings, where the dielectric material forms a top surface and a bottom surface for the metal lens to reduce reflected energy.
H01Q 15/10 - Refracting or diffracting devices, e.g. lens, prism comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric
A phased antenna array calibration station comprising an enclosure comprising a first rectangular interior room comprising at least one exterior door, a power source device, a cooling device, and a controller device configured to control power, cooling, and testing within a second interior room and an antenna under test (AUT); and the second rectangular interior room comprising at least one interior door abutting the first interior room, an opening in one wall of the second interior room, a radio frequency (RF) absorbing material covering all interior surfaces of the second interior room, and at least one movable electromagnetic interference (EMI) shield configured to form an EMI seal around the opening and active elements of AUT aligned with opening; and support fixture configured to support AUT and align active elements of AUT with opening to second interior room comprising cooling and electronic unit (CEU) configured to cool AUT and operate AUT.
G01R 29/08 - Measuring electromagnetic field characteristics
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
A directed energy system is provided and includes a housing defining an unobscured aperture for emitted electromagnetic (EM) radiation and a stiffening strut assembly installed at an outlet of the housing and through which the emitted EM radiation passes. The directed energy system and various elements such as the telescope and optical trains described herein are well suited for, but not limited to, high-energy (HE) laser applications.
G02B 7/182 - Mountings, adjusting means, or light-tight connections, for optical elements for prismsMountings, adjusting means, or light-tight connections, for optical elements for mirrors for mirrors
70.
FREQUENCY STABILIZED MICROWAVE SOURCE USING AN IQ MIXER TO DETECT AMPLITUDE MODULATION OF THE REFLECTED SIGNAL
An IQ mixer is used in a Pound-stabilized microwave source to detect amplitude modulation of the signal reflected from the reference resonator. By properly configuring the IQ mixer so that the LO and RF inputs are maintained in quadrature at the Q mixer, hence in-phase at the I mixer, lower levels of amplitude modulation may be detected at lower modulation frequencies compatible with optimal choices of resonator coupling and maximal phase to amplitude conversion.
FREQUENCY STABILIZED AND PHASE NOISE SUPPRESSED MICROWAVE SOURCE USING AN IQ MIXER TO DETECT AMPLITUDE MODULATION AND PHASE PERTUBATION OF THE REFLECTED SIGNAL
An IQ mixer is used in a Pound-stabilized microwave source to detect amplitude modulation of the signal reflected from the reference resonator. By properly configuring the IQ mixer so that the LO and RF inputs are maintained in quadrature at the Q mixer, hence in-phase at the I mixer, lower levels of amplitude modulation may be detected at lower modulation frequencies compatible with optimal choices of resonator coupling and maximal phase to amplitude conversion. With the Q mixer held in quadrature it acts as a broadband phase noise detector. A portion of the Q mixer output is bandpass filtered and summed with the I mixer Pound-server voltage to achieve both center frequency stabilization and broadband phase noise suppression.
RXnRXn using RF far field calibration source for each at least one radar antenna, operating at least one radar antenna in RX mode with at least one near field antenna to determine plurality of RX mode phases in at least one radar antenna and at least one near field antenna, operating at least one radar antenna in TX mode with at least one near field antenna to determine plurality of TX mode phases in at least one radar antenna and at least one near field antenna, and deriving TX mode calibration phases as function of determined RX mode phases and determined TX mode calibration phases.
H01Q 3/26 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elementsArrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture
G01S 13/02 - Systems using reflection of radio waves, e.g. primary radar systemsAnalogous systems
A resonator array panel includes a perforated first sheet, a second sheet, and a resonator core. The perforated first sheet includes a first sheet body. The second sheet includes a second sheet body. The second sheet body includes a second exterior side surface and a second interior side surface. The first resonator core is disposed between the perforated first sheet and the second sheet. The first resonator core includes a first plurality of sidewalls. The first plurality of sidewalls forms a first plurality of resonators between the perforated first sheet and the second sheet. The first plurality of resonators includes a first resonator. The first resonator includes a first viscoelastic body disposed within the first resonator cavity.
B32B 3/12 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by a layer of regularly-arranged cells whether integral or formed individually or by conjunction of separate strips, e.g. honeycomb structure
B32B 3/20 - Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material of hollow pieces, e.g. tubesLayered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shapeLayered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. apertured or formed of separate pieces of material characterised by an internal layer formed of separate pieces of material of pieces with channels or cavities
G10K 11/172 - Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
A method for use in a computing device, including: receiving a first value of a first parameter, the first value being generated by a monitoring device that is arranged to monitor a respective monitored system; retrieving, from a memory, a first threshold that is associated with the first parameter and the respective monitored system; and generating a first system condition alert when the first value has crossed the first threshold.
Systems and methods are provided for producing aligned and aggregated aligned time surfaces. An exemplary method includes: receiving camera event data from a first location; computing, using the camera event data, a plurality of unaligned time surfaces; determining a plurality of optical flows corresponding to the unaligned time surfaces; determining, using the optical flows, an accumulated optical flow for mapping displacement between any two time periods; producing, using the optical flows, for a plurality of consecutive mapped time surfaces; performing, using the accumulated optical flow, warping of the mapped time surfaces producing corresponding aligned time surfaces; and aggregating the aligned time surfaces to produce an image having lowered blurring of object boundaries.
A warning receiver (50) can be detachably mounted on the inside of a window of a manned platform to detect RF or RF and laser threats and to provide visual or audio warnings to the human occupant. The warning receiver is fully self-contained and independent of any systems on the manned platform. In different packaging configurations, the receiver can be manually rotated to better visualize the threat and/or the receiver's human-machine interface (74) can be manually rotated to better display the warnings. Although most typically used in manned aircraft the warning receiver can be used in other manned vehicles or ships.
A method includes receiving (702) an outgoing data stream (502) and dividing (704) the outgoing data stream to generate multiple electromagnetic signals in multiple channels using a first manifold (208). The method also includes modifying (706) at least some of the electromagnetic signals in at least some of the channels to generate scrambled electromagnetic signals. The method further includes combining (708) the scrambled electromagnetic signals to generate one or more outgoing scrambled combined electromagnetic signals using a second manifold (212). In addition, the method includes transmitting (710) the one or more outgoing scrambled combined electromagnetic signals. The outgoing data stream may include an outgoing optical data stream, and a photonic integrated circuit (116, 400) may divide the outgoing optical data stream and produce scrambled optical signals. The photonic integrated circuit may be configured to handle outgoing optical data streams having different protocols and/or different data rates.
A sensing system includes a focal plane array, a detector dual-input circuit, a detector selector circuit and a select module. The focal plane array includes a plurality of detectors. The detector dual-input circuit combines outputs from the detectors received at a first input channel without outputs received at a second input channel. The detector selector circuit establishes a first signal path between the detectors and the first input channel and a second signal path between the detectors and the second input channel. The detector selector circuit includes a mask that maps the detectors to a first detector group or a second detector group. Based on the mask designation, the select module connects one or more of the detectors to the first signal path to establish the first detector group and connects one or more of the detectors to the second signal path to establish the second detector group.
H04N 25/00 - Circuitry of solid-state image sensors [SSIS]Control thereof
H03M 7/30 - CompressionExpansionSuppression of unnecessary data, e.g. redundancy reduction
H04N 25/46 - Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by combining or binning pixels
79.
INTEGRATED PHOTONIC INTEGRATED CIRCUIT (PIC) AND READOUT INTEGRATED CIRCUIT (ROIC) FOR HIGH-SPEED DATA OUTPUT FROM FOCAL PLANE ARRAY
An apparatus includes a focal plane array (202) configured to receive incoming light (208). The apparatus also includes a readout integrated circuit (206) configured to generate electrical signals based on the incoming light received by the focal plane array. The apparatus further includes a photonic integrated circuit (206) positioned between the focal plane array and the readout integrated circuit. The photonic integrated circuit is configured to receive the electrical signals and generate output optical signals (212) based on the electrical signals. In some cases, the apparatus may include electrically-conductive vias (210) electrically coupling the focal plane array and the readout integrated circuit, where at least some of the electrically-conductive vias may extend through the photonic integrated circuit. The focal plane array, the readout integrated circuit, and the photonic integrated circuit may form at least part of a monolithic structure.
A heat spreader is provided and includes a core of orthotropic material having first and second preferred directions of thermal conduction, a top plate, a bottom plate and pyrolytic graphite sheets (PGSs). The PGSs are interposed in a compressed state as a thermal interface material (TIM) between the core and the top plate and between the core and the bottom plate in a compression direction aligned with at least one of the first and second preferred directions of thermal conduction.
H01L 21/48 - Manufacture or treatment of parts, e.g. containers, prior to assembly of the devices, using processes not provided for in a single one of the groups or
H01L 23/373 - Cooling facilitated by selection of materials for the device
81.
MULTIPULSE ROCKET MOTOR WITH PRESSURE-EQUALIZING CHANNELS
A multipulse rocket motor includes a secondary pulse, fired after a primary pulse of the motor, that includes a thermal insulator having channels therein, around a propellant grain of the secondary pulse. The channels provide a way to equalize pressure on the propellant grain of the secondary pulse, to reduce stresses on the propellant grain as the primary pulse is operating. The channels may extend along most or substantially all of a length of the secondary pulse. The channels may be defined by material strips of thermal insulator material evenly circumferentially spaced around the secondary pulse.
F02K 9/28 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant thereforControl thereof using solid propellants having two or more propellant charges with the propulsion gases exhausting through a common nozzle
A method of decreasing a cycle time of a brazing process is provided. The method includes arranging each of first and second pairs of braze parts together, each of the first and second pairs of the braze parts having braze material interposed between the braze parts, stacking the first and second pairs of the braze parts to form a stack, interposing pyrolytic graphite (PG) between the first pair of the braze parts and the second pair of the braze parts in the stack and heating the first and second pairs of the braze parts to a brazing temperature to braze the braze parts of each of the first and second pairs of the braze parts together.
A fastener for engaging a threaded opening includes two shaft elements extending from a cap end to a shaft end and having a partially cylindrical shape, an internal alignment shaft surrounded by a central cavity, a releasable constriction mechanism, a releasable expansion mechanism, and a cap which can engage the cap ends of the shaft elements such that the shaft elements move relative to the internal alignment shaft. At least a portion of at least one shaft end includes external threads. The shaft elements are oriented about the central cavity and the central cavity is defined by internal surfaces of the shaft elements. The releasable constriction mechanism can constrict about the shaft elements such that the shaft elements move inward toward the internal alignment shaft. The releasable expansion mechanism can allow the shaft elements to move away from the internal alignment shaft.
F16B 13/08 - Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front with separate gripping parts moved into their final position in relation to the body of the device without further manual operation
F16B 19/10 - Hollow rivetsMulti-part rivets fastened by expanding mechanically
84.
TWO-PHASE LIQUID-COOLED ALTERNATING CURRENT (AC) ROTATING ELECTRICAL MACHINE
A two-phased liquid-cooled AC rotating electrical includes a plurality of cooling circuits that recirculate and transition respective engineered liquids between liquid and vapor states around closed-loop fluid paths to cool a plurality of machine components e.g., hollow conductor rotor and stator windings and a magnetic stator core. A portion of each fluid path is either integrated with or in thermal contact with its component. The engineered liquids are evaporated within the respective portions of the fluid paths to hold the operating temperatures at or near the respective and different phase transition temperatures.
H02K 9/20 - Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil wherein the cooling medium vaporises within the machine casing
H02K 3/22 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of hollow conductors
H02K 5/20 - Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
85.
WEAVED PYROLYTIC GRAPHITE SHEETS FOR HEAT SPREADING
A heat spreading element is provided and includes first and second pyrolytic graphite sheets (PGSs) arranged to form an opening between respective proximal ends thereof and a weaved PGS. The weaved PGS includes a first section disposed above the first PGS, a second section disposed below the second PGS and a weaved section extending between respective proximal ends of the first and second sections and through the opening.
A high electron mobility heterostructure and a method of fabricating the heterostructure, wherein the high electron mobility heterostructure comprises a substrate, a buffer on the substrate, a doped charge compensation layer on the buffer, a double continuous grade barrier on the doped charge compensation layer having increasing polarization charge and decreasing polarization charge, a channel on the double continuous grade barrier, and a charge generation layer on the channel. The method comprises forming a substrate, forming a buffer on the substrate, forming a doped charge compensation layer on the buffer, forming a double continuous grade barrier on the doped charge compensation layer, forming a channel on the double continuous grade barrier, and forming a charge generation layer on the channel.
H01L 29/20 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
H01L 21/20 - Deposition of semiconductor materials on a substrate, e.g. epitaxial growth
An on-gimbal telescope pointing assembly (100) comprises a head mirror (102) operable to rotate to adjust an elevation angle of the pointing assembly (100) and an all-reflective telescope (103) operable to rotate to adjust an azimuth angle of the pointing assembly (100). The all-reflective telescope (103) can comprise a fold mirror (112) defining an output coude path of the all-reflective telescope (103). The pointing assembly (100) can be operable to rotate about the coude path such that receiving optics (114) can remain fixed while the pointing assembly (100) rotates.
G02B 17/06 - Catoptric systems, e.g. image erecting and reversing system using mirrors only
G02B 23/06 - Telescopes, e.g. binocularsPeriscopesInstruments for viewing the inside of hollow bodiesViewfindersOptical aiming or sighting devices involving prisms or mirrors having a focusing action, e.g. parabolic mirror
G02B 23/16 - HousingsCapsMountingsSupports, e.g. with counterweight
An acoustic system and method of fabricating the acoustic system, wherein the acoustic system comprises at least one tube having at least one opening through which an acoustic wave travels to increase sensitivity of the acoustic system and at least one hydrophone in the at least one tube, wherein the at least one hydrophone is encapsulated and the method comprises inserting at least one encapsulated hydrophone in at least one tube with at least one opening through which an acoustic wave travels to increase sensitivity of the at least one hydrophone, inserting the at least one tube into a fluid, and receiving the acoustic wave through the fluid by the at least one hydrophone.
An apparatus is provided that includes a structure. This structure includes a first skin, a second skin and a cellular core connected to the first skin and the second skin. The cellular core includes a cantilevered damper and an internal cavity between the first skin and the second skin. The cantilevered damper projects into the internal cavity. The cantilevered damper includes a plurality of damper masses and a plurality of damper arms interconnecting the plurality of damper masses together.
A method is provided for assembling an apparatus. During this method, a circuit element is arranged with a circuit board. The circuit element includes an element aperture. The circuit board includes a board aperture. A plunger is moved in a first direction to pass a distal end of the plunger through the element aperture and the board aperture and into a volume adjacent the circuit board. A retainer is pivoted within the volume. The retainer is pivotally mounted to the plunger at the distal end of the plunger. The plunger is moved in a second direction to clamp the circuit board between the retainer and the circuit element.
A method of thrust vectoring a missile (10) utilizing jet tabs (24) is presented. Jet tabs are used to create lateral control moments on a missile by rotating tabs into the rocket exhaust plume (22) and changing the thrust deflection angle. The method includes simultaneously rolling the missile during the thrust vector maneuver in order to reduce the maximum tab exposure to the rocket plume. The method enables aggressive pitchover maneuvers while reducing the risk of tab failure due to excessive exposure.
F02K 9/80 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant thereforControl thereof characterised by thrust or thrust vector control
F02K 9/90 - Rocket-engine plants, i.e. plants carrying both fuel and oxidant thereforControl thereof characterised by thrust or thrust vector control using deflectors
F42B 10/64 - Steering by movement of flight surfaces of fins
F42B 10/66 - Steering by varying intensity or direction of thrust
A launcher for launching a flying vehicle, such as a projectile or missile, includes a cutter for cutting a line, such as an umbilical line, that is coupled to the vehicle prior to launch. An example of a line is a tube for providing cooling for onboard components of the vehicle, such as a seeker of the vehicle. The cutter may be part of a mount of the launcher for mounting the line and other components, such as a compressor. The cutter may be configured so that as the vehicle translates relative to the launcher during the initiation of launch, the line moves against the cutter, severing the line. The cutter may retract after severing the line, for example being pulled away from the vehicle (and into the mount) by a spring mechanism.
Systems, devices, methods, and computer-readable media for horizon-based navigation. A method can include receiving image data corresponding to a geographical region in a field of view of an imaging unit and in which the device is situated, based on the received image data, generating, by the processing unit, an image horizon corresponding to a horizon of the geographical region and from a perspective of the imaging unit, projecting three-dimensional (3D) points of a 3D point set of the geographical region to an image space of the received image data resulting in a synthetic image, generating, by the processing unit, a synthetic image horizon of the synthetic image, and responsive to determining the image horizon sufficiently correlates with the synthetic image horizon, providing a location corresponding to a perspective of the synthetic image as a location of the processing unit.
A mechanism for attachment and detachment of a fixed or controllable airfoil to an airframe includes a base adapted for attachment to a root of the airfoil and a slot beam adapted for attachment along the airframe (e.g., parallel to the longitudinal X-axis of the airframe). The base includes a plurality of pins spaced along and held between parallel rails. The slot beam includes a plurality of slots arranged along the beam. Each slot has a lead-in portion to receive one of the plurality of pins and a longitudinally-oriented tapered portion (e.g., parallel to the longitudinal X-axis with a taper between 1 and 5 degrees) to engage the pin so that the base is seated in the slot beam to position the airfoil against the airframe in an XY plane. A pre-load mechanism is configured to apply a force along the X-axis to press the plurality of pins into the respective tapered portions to fix the base relative to the slot beam in six degrees of freedom (6 DOF).
A spectrometer is configured to form a spectrally resolved image of electromagnetic radiation from an electromagnetic radiation source. The spectrometer can include an optical guide device configured to guide electromagnetic radiation along an optical path. The optical guide device can include a first prism positioned in the optical path. The optical guide device can further include a focusing optic. The first prism can include at least one freeform prism surface that comprises at least some degree of cylindrical curvature having freeform polynomial terms formed thereon, which surface can be a substantially cylindrical, a substantially acylindrical, or a substantially flat surface having freeform polynomial terms formed thereon.
A water-based acrylic latex paint has a dispersant-over-pigment (DOP) ratio between 0.5 and 1.5 to form a coating in which the pigment has a low concentration and is highly dispersed throughout to absorb in the visible band to produce a color (e.g., black) and is transmissive in the NIR and SWIR bands. The variables that determine absorption in the visible band and transmission in the NIR and SWIR bands include the DOP ratio, a pigment weight percentage between 1-2% in the paint and a coating thickness between 2 and 4 mil. To control the viscosity, the dispersing agent is suitably an acrylate-based block co-polymer, of molecular weight above 2,000 grams per mole, that includes an amine-functional block to anchor onto the pigment.
An apparatus includes a thermal actuator switch (102, 104, 202, 204, 302, 400, 500) configured to control a transfer of thermal energy through the thermal actuator switch. The thermal actuator switch includes first and second plates (402-404, 502-504) and a piston (408, 508) movable laterally between the first and second plates. The thermal actuator switch also includes a phase change material (418, 518) configured to (i) expand to move a surface of the piston into a first position and (ii) contract to allow the surface of the piston to move into a second position. The surface of the piston thermally contacts the first plate and increases thermal energy transfer between the first and second plates when in one of the first and second positions. The surface of the piston is spaced apart from the first plate and decreases thermal energy transfer between the first and second plates when in another of the first and second positions.
A test system comprising an array of radiating antenna elements, each antenna element in the array operatively connected to a beam former; and at least one signal generator operatively connected to the beam former; wherein the test system is configured to generate simultaneous plane waves in the near-field region.
A cover for an effector, such as a projectile, missile, or gun-launched effector, includes two parts that are translatable relative to one another, such that the cover separates in stages as the effector launches. The cover includes an outer cover portion that is made up of multiple outer cover segments that together define a central opening through which part of an inner cover portion extends. In a launch of the effector, the effector first makes contact with the inner cover portion. This pushes the inner cover portion forward, breaking the attachment with the outer cover portion, and allowing the inner cover portion to translated forward relative to the outer cover portion. As the inner cover portion translates forward relative to the outer cover portion, the inner cover portion eventually makes contact with the outer cover portion, with both being pushed forward, and separating from the launcher.
A transistor and method of fabricating the same comprising a channel layer; an epitaxial barrier layer on the channel layer; an epitaxial cap layer on the epitaxial barrier layer; a dielectric layer on the epitaxial cap layer having an opening through to the epitaxial barrier layer; a gate (301) having angled sidewalls in the opening of the dielectric layer; a mini field plate (303) having angled sidewalls on the gate; and a gate top (305) on the mini field plate, wherein the gate, the mini field plate, and the gate top form a "T" shape.
H01L 29/423 - Electrodes characterised by their shape, relative sizes or dispositions not carrying the current to be rectified, amplified or switched
H01L 21/285 - Deposition of conductive or insulating materials for electrodes from a gas or vapour, e.g. condensation
H01L 29/778 - Field-effect transistors with two-dimensional charge carrier gas channel, e.g. HEMT
H01L 29/20 - Semiconductor bodies characterised by the materials of which they are formed including, apart from doping materials or other impurities, only AIIIBV compounds
patents
