Abstract: A device for improving the aerodynamic feature of a projectile is disclosed. The projectile has a front part and a rear part. The external diameter of the front part of the projectile is larger than the external diameter of the front end of a rear part of the projectile. The front end of the rear part of the projectile is conical having larger diameter at locations behind the front end. The device comprises an annular cut-off cone sleeve slidably disposable over the front part of the projectile. The diameter of the narrower end of the annular cone sleeve is slightly larger than the diameter of the front part of the projectile and the length of the annular cut-off cone sleeve is larger than the distance between the front end of the rear part of the projectile and a location on rear part having a diameter equal to the diameter of the rear end of the annular cut-off cone sleeve.

Abstract: Techniques are provided for geolocation of a radar emitting source. A methodology implementing the techniques according to an embodiment includes calculating time difference of arrival (TDOAs) of ground emitter radar pulses, within a dwell period, between two long baseline interferometer (LBI) antennas. The TDOA calculations are based on a precision estimate of the time of arrival of the radar pulses. The method further includes calculating an LBI phase wrap disambiguation factor based on (1) the TDOAs, (2) an average of frequencies of the radar pulses within the dwell period, and (3) an average of phase shifts of the radar pulses between the LBI antennas within the dwell period. The method further includes mapping a curve of points onto the surface of the earth based on an LBI cone angle calculation employing the LBI phase wrap disambiguation factor. The curve of points is associated with a geolocation of the ground emitter.

Abstract: Techniques and architecture are disclosed for a method for making a custom circuit comprising forming a common wafer template, selecting at least two elements of the common wafer template to be chosen elements, and adding at least one metal layer to interconnect the chosen elements to form a circuit. The common wafer template includes a plurality of transistors, a plurality of resistors, a plurality of capacitors, and a plurality of bond pads. Final circuit customization of the common wafer template is accomplished by adding at least one metal layer that forms interconnects to passive and active elements in the template in order to complete the circuit.

Abstract: The system and method for accurately determining range-to-go for a time-delayed command detonation of a projectile. Using dual laser and/or radio frequency detectors on the tail and on the nose of a spinning projectile to determine the range-to-go, time-to-go, and/or lateral offset from the projectile to the target. A time to detonation clock is used to determine when a projectile transitions from an exterior to an interior of a structure such that the projectile can more accurately detonate within a fixed structure.

Abstract: A communications receiver. One example embodiment is a system-in-package (SIP) device, which includes a three-dimensional interposer, a first bandpass filter integrated into the three-dimensional interposer, a first integrated circuit chip on the three-dimensional interposer, a second integrated circuit chip on the three-dimensional interposer, a second bandpass filter integrated into the three-dimensional interposer, and a third bandpass filter integrated into the three-dimensional interposer. The first integrated circuit chip includes a balanced amplifier that receives a first filtered signal and suppress distortion products. The second integrated circuit chip includes a first mixer and a second mixer. The first mixer receives an output of the balanced amplifier and mixes the output with a first oscillator signal. The second bandpass filter receives an output from the first mixer and generates a second filtered signal.

Abstract: A system and method for analyzing a device under test is provided. The system includes a signal source for generating an incident signal. The incident signal is routed to one or more inputs of the device under test. The system further includes signal separation and routing circuitry for measuring a portion of the incident signal to provide a reference signal and for separating the incident signal and a reflected signal at the one or more inputs of the device under test. The signal separation circuitry for separating the incident signal and the reflected signal at the input of the device under test is accomplished by a resistive device. The system may further include sampling device operationally coupled to the resistive device. The system and method may further include a signal switching mechanism for sequentially routing time slices of two or more signals to be coherently compared.

Abstract: A dynamic differential amplifier includes: gain transistors to drive with differential input voltage levels; sample capacitors having first terminals to ramp from an initial voltage level to differential amplified voltage levels of the input voltage levels in response to the driven gain transistors; and adjustment circuits to adjust the amplified voltage levels in the direction of the initial voltage level by an offset voltage level. In some cases, second terminals of the sample capacitors are a common-mode node to maintain a common-mode voltage level midway between the ramping voltage levels of the first terminals. In some cases, the dynamic differential amplifier further includes a comparison circuit to compare the maintained common-mode voltage level to a threshold voltage level, wherein the first terminals of the sample capacitors stop ramping and the adjustment circuits adjust the amplified voltage levels in response to the compared common-mode voltage level reaching the threshold voltage level.

Abstract: Techniques are disclosed for providing a secure computational platform that facilitates collaboration of assets from different asset providers without exposure of the assets to threats. The assets may be in the form of tools, models, simulations, and other computational assets, which can be used, for example, to perform trade studies. The secure computational platform provides for integration of the assets in a workflow, while protecting the assets during construction and execution of the workflow. In some instances, each asset in the workflow is executed in an IT infrastructure of the asset provider to which the asset belongs.

Abstract: An unmanned underwater vehicle having one, some, or all of an integrated communication control fin, a ballast and trim control, a reusable trigger mechanism for a drop weight, and a visual hull display. Furthermore, associated methods are also provided.

Abstract: A fuze setter interface for substantially simultaneously and wirelessly transferring power and data between a fuze setter and fuze. The fuze setter interface includes separate power and communications interfaces. In the power interface, an induction coil is provided in each of the fuze setter and fuze. Power is transferred by magnetic field coupling between the induction coils. In the communications interface, a communications member is provided in each of the fuze setter and fuze, along with appropriate functions to generate alternating-current (AC) waveforms, and condition, modulate or demodulate signals. In one example, both communications members are induction coils that transfer data by magnetic field coupling. In another example, both communications members are radio-frequency (RF) transceivers that transfer data by radio signal. The RF transceiver in the fuze may be a Height of Burst (HoB) sensor.

Abstract: An adaptive camouflage device that includes at least one non-emissive layer which includes a guest-host liquid crystal (GHLC).

Abstract: A laser diode array (102) comprising a plurality of laser diodes (201-210) and a channel (212) proximate to each of the laser diodes (201-210), the channel (212) configured to receive and provide a passage for a flow of a fluid coolant; wherein the laser diodes (201-210) are configured to emit electromagnetic radiation having the same centre wavelength at different respective junction temperatures. A coolant supply system (104) coupled to the laser diode array (102) may cause coolant to flow through the channel (212). A flow rate of the coolant through the channel (212) may be controlled based on temperature measurements of the coolant prior to entering, within, and/or after exiting the laser diode array (102).

Abstract: An identification friend or foe (IFF) transponder includes: an electronic receiver to receive encoded challenges from an IFF interrogator; a processing circuit including a decode circuit to decode the received challenges into encrypted challenges using a time of day (TOD) and/or a cryptographic key, a decrypt circuit to decrypt the encrypted challenges into challenges using the TOD and/or the key, a reply circuit to generate replies to the challenges, and an encode circuit to encode the generated replies using the TOD and/or the key; an electronic transmitter to transmit the encoded replies to the IFF interrogator; and an alert circuit to detect the encrypted challenges from the received challenges without using the TOD or the key, use the detected challenges to determine if the TOD is incorrect and/or the key is wrong, and issue an alert in response to determining the TOD is incorrect and/or the key is wrong.

Abstract: A system and method of verifying hardware that includes software configured to control its operation, the method comprising providing an abstracted version of hardware to be tested; verifying the functionality of the hardware; writing test bench software using physical-layer routines; drafting hybrid verification intellectual property modules, wherein the hybrid verification intellectual property modules comprise both synthesizable and non-synthesizable code and are configured to stimulate the abstracted hardware and to test software anticipated to be used in connection therewith; and creating network-level routines that can be passed to physical-layer routines as part of a hardware verification process.

Abstract: A pressure sensing system includes a pressure transducer, a pressure manifold, and a heater assembly. The pressure transducer is configured to measure pressures at one or more locations of a vehicle engine. The pressure manifold is configured to cover a face of the pressure transducer and provide an interface for transferring air or gas generated at the one or more locations of the vehicle engine. The heater assembly is configured to heat one or more portions of the pressure transducer and one or more portions of the pressure manifold and maintain a temperature of each of the pressure transducer and the pressure manifold above a predetermined temperature level.

Abstract: A system and method for adaptive spurious signal (spur) processing at a broadband RF receiver. Spur processing addresses the detection of spurs generated by the receiver when high level RF signals are present at its input. The spurs can lead to undesired false detections. Based on signal parameters of the received RF signal, the system detects a strong enough real signal that would cause a spur and prevent generation of false reports. The adaptive spur mitigation scheme uses multiple detection and report thresholds to enable false report rejection with an improved high probability of rejecting false detections, while minimizing the adverse effects on multi-tone dynamic range. The necessary detection and report thresholds are generated based on a system level behavioral model that predicts the performance of several different types of spurs as a function of signal parameters. The thresholds are tuned to match the behavior of the dominant spur.

Abstract: A transducer system includes a housing, an electromechanical transducer within the housing, a wicking material adjacent to a portion of the electromechanical transducer, and a coolant solution within the housing. The coolant solution transitions from a liquid phase to a gaseous phase in response to a temperature of the electromechanical transducer exceeding a threshold temperature. In some example cases, the coolant solution has a boiling point of less than about 60° C., which effectively defines the threshold temperature. The coolant solution may be chosen such that it remains a liquid during a first phase (cooling via conduction), and then evaporates during a second phase (cooling via conduction and convection) as the electromechanical transducer heats up.

Abstract: A guidance system for deployment on-board a projectile includes a laser-seeking detector, an imaging device, and a control module. The laser-seeking detector is designed to detect the position of the projectile with reference to a laser spot on a target. The imaging device is designed to capture one or more images in front of the projectile. The control module is designed to control a flight direction of the projectile based on input received from the laser-seeking detector in a first mode, control the flight direction of the projectile based on input received from the imaging device in a second mode, and switch between the first mode and the second mode while the projectile is in flight towards the target. Both guidance technologies are leveraged to develop an improved guidance technique that provides highly accurate targeting and allows for a faster rate of fire to deal with multiple targets.

Abstract: The present invention provides a vehicle comprising: a rotor and a stator; at least one planar control surface coupled to the rotor, wherein the rotor is configured to rotate relative to the stator such that, in use, the at least one planar control surface moves from a first position to a second position, and wherein in the first position the planar control surface is controllable to affect substantially only the pitch of the vehicle and in the second position the planar control surface is controllable to affect substantially both of the pitch and yaw of the vehicle, or substantially only the yaw, or in the first position the planar control surface is controllable to affect substantially only the yaw of the vehicle and in the second position the planar control surface is controllable to affect substantially both of the pitch and yaw of the vehicle, or substantially only the pitch of the vehicle. The present invention also provides a method of controlling a vehicle.

Abstract: A transducer system includes a housing having an opening, an electromechanical transducer within the housing, and an elastomeric boot over the opening. At least a portion of the elastomeric boot includes copper-comprising particles. In some applications, the copper acts as an antifouling agent and/or enhances the thermal conductivity of the elastomeric boot.