Abstract: A method includes receiving wavelength domain data for a time step, performing a Discrete Fourier Transform (DFT) to transform the wavelength domain data for the time step into frequency domain data for the time step only for the limited set of frequency bins associated with a frequency of interest, calculating pressure based on the frequency domain data for the time step, and updating the frequency of interest and the limited set of frequency bins. The method includes repeating receiving wavelength data for subsequent time steps, performing a DFT to transform the wavelength data for the respective subsequent time steps, calculating pressure for each subsequent time step, and updating the frequency of interest and limited set of frequency bins for each subsequent time step. The method includes outputting pressure data based on calculating pressure for the subsequent time steps.

Abstract: A laser diode drive system configured to output a drive signal to control a voltage provided to a laser diode can include a circuit sensor system configured to output a sensed signal indicative of a drive current of a laser diode, and a temperature sensor configured to output a temperature signal indicative of a temperature of the laser diode or an ambient temperature of the laser diode. The system can include a temperature compensation system configured to output a correction signal based on the temperature signal to compensate for a temperature dependent factor in the sensed signal.

Abstract: In accordance with at least one aspect of this disclosure, a fuel quantity measurement system includes, one or more pressure sensors are configured to operatively connect external to a fuel volume of a fuel tank, and can be operative to sense and output a signal indicative of a pressure outside of the fuel volume. One or more hollow pressure tubes can be configured to be disposed in the fuel volume in the fuel tank. The one or more hollow tubes can have a first end in fluid communication with the fuel volume and a second end configured to be sealed against an ambient environment external to the fuel tank. One or more temperature sensors can be configured to operatively connect within the fuel tank, operative to sense and output a signal indicative of a temperature of the fuel tank.

Abstract: A non-uniformity correction (NUC) calibration method comprises obtaining image data for a plurality of images with an image sensor, wherein each image in the plurality of images is obtained at a different respective global pixel gain setting and global expose in the image sensor; and using the image data for non-uniformity correction calibration to compute pixel NUC values for the pixels in the image sensor. The method can further include storing the pixel NUC values and obtaining further image data corrected by the stored pixel NUC values. In embodiments, the method can include moving a platform based on the further image data. In certain embodiments, the platform can be a guided munition.

Abstract: In accordance with at least one aspect of this disclosure, an actuation system for a guided munition, includes a reservoir disposed in a guided munition body housing a compressible fluid in a compressed state, a fluid path connecting the reservoir in fluid communication with a heat exchange volume, a throttling orifice disposed in the fluid path configured to expand the compressible fluid, and an actuation path connecting the heat exchange volume in fluid communication with a moveable component. The actuation path can be configured to supply pneumatic pressure to the moveable components.

Abstract: A heatsink can include a body, one or more thermal fin arrays defined by and/or extending from the body, and a phase change material disposed in contact with the one or more fin arrays. The phase change material can be configured to be a first phase in a cool state and a second phase in a heated state. The phase change material is configured to be cooled back to the solid state.

Abstract: In accordance with at least one aspect of this disclosure, a thermal management system for an electronics assembly includes, a reservoir housing a compressible fluid in a compressed state, a throttling orifice disposed in fluid communication with the reservoir and configured to expand the compressible fluid, cooling the compressible fluid, and a heat exchange volume in fluid communication with the throttling orifice to receive cooled compressible fluid from the throttling orifice.

Abstract: A guided munition system includes a munition body including at least one fluid dynamic control for changing course of the munition body in flight. A seeker onboard the munition body is operatively connected to control the at least one fluid dynamic control. The seeker includes a coded aperture imaging device facing outward from the munition body for image based control for guiding the munition body in flight.

Abstract: A system (e.g., a power and communication system for remote components) can include a first wire, a second wire, and a first module operatively connected to the first and second wire. The first module can be configured to output power to and to communicate over the first wire and second wire. The system can include a second module operatively connected to the first module by the first wire and the second wire. The second module can be configured to receive power from the first module and to communicate with the first module over the first wire and/or second wire. The first module can be configured to modify a voltage on at least the first wire to signal to the second module to provide serial communication to the first module via the first wire and/or second wire.

Abstract: A system including a system controller configured to transmit a first amount of commands in order to produce a desired effect by a group of actuators acting in combination. A system controller configured to control a group of at least two actuators in order to produce at least one combined effect, wherein the number of actuators is greater than or equal to the number of effects. A system controller configures to independent and variable bandwidths or responses of the desired effects produced by the actuators acting in combination.

Abstract: In certain embodiments, an imaging system includes an enclosure with an objective aperture opening into an interior space of the enclosure, an optical assembly optically coupling the objective aperture to an imaging sensor within the enclosure, a shutter mounted to the objective aperture for selectively blocking and admitting illumination through the objective aperture into the interior space, and an illuminator mounted to illuminate the interior space of the enclosure.

Abstract: A load sensing system for sensing a load on a structure can include an optical load sensing element configured to change an optical state based on a force applied thereto, an optical source operatively connected to the optical load sensing element and configured to input an input optical signal to the optical load element, and an optical detector configured to receive a returned optical signal from the optical load sensing element. The optical detector can be configured to detect one or more frequency peaks of the returned optical signal and to use the one or more frequency peaks of the returned optical signal to correlate to a load value of the load and output the load value indicative of the load.

Abstract: A smart sensor can include a plurality of analog-to-digital converters (ADCs) configured to receive analog signals from a sensor module, and a plurality of channel modules. Each channel module can be connected to a respective ADC and each channel module can include a limited data processing module configured to provide initial processing. The sensor can include a data control module operatively connected to each of the plurality of channel modules and configured to select a selected channel of the plurality of channels to receive initially processed data from the limited data processing module of the selected channel. The data control module can be configured to interface with external memory to store data to the external memory and/or to read data from the external memory.

Abstract: A non-uniformity correction (NUC) calibration method comprises obtaining image data for a plurality of images with an image sensor, wherein each image in the plurality of images is obtained at a different respective global pixel gain setting and global expose in the image sensor; and using the image data for non-uniformity correction calibration to compute pixel NUC values for the pixels in the image sensor. The method can further include storing the pixel NUC values and obtaining further image data corrected by the stored pixel NUC values. In embodiments, the method can include moving a platform based on the further image data. In certain embodiments, the platform can be a guided munition.

Abstract: A method is provided for sensing proximity of a target. The method includes sensing inductance associated with a magnetic field, wherein the inductance is affected by the target when the target is proximate the magnetic field. The method further includes providing the sensed inductance for processing. The processing includes determining an inductance value from at least the sensed inductance and estimating a parameter of a gap between a location of sensing the inductance and the target as a function of the inductance value and application of a nonlinear model of a relationship between the gap and inductance.

Abstract: A system and method for analyzing structural heath data includes a structural body, structural health sensors, and first and second computer systems. The structural health sensors are configured to sense data regarding structures of the structural body. The first computer system is configured to collect the sensed data as the structural health data. The second computer system that includes a user interface and display, and is configured to receive the structural health data and provide interactive transformational analysis of the structural health data. The interactive transformational analysis provides, on the display of the second computer system, a visual representation of the structural health data over time.

Abstract: A reconfigurable edge computing node of a complex system is provided, the edge computing node including a core module executing selectable core software, and selectable input module(s) and/or output module(s) which can be installed in corresponding input/output ports, wherein each of the input module(s) or output module(s) provides a conduit for moving data to or from the complex system, with selections being chosen from catalogs of available input modules, available output modules, and available core software. The edge computing node provides reconfiguration upon attachment of any input or output module(s), or upon installation of any core software, automatically reconfiguring the edge computing node to enable communication between the core module and the input module(s) and output module(s) using compatible protocols.

Abstract: In certain embodiments, an imaging system includes an enclosure with an objective aperture opening into an interior space of the enclosure, an optical assembly optically coupling the objective aperture to an imaging sensor within the enclosure, a spatial light modulator (SLM) mounted to the objective aperture for selectively blocking and admitting illumination through the objective aperture into the interior space, and an illuminator mounted to illuminate the interior space of the enclosure.

Abstract: A power and data communication system including an inboard computer system that includes a resistor network, an outboard computer system that includes at least one current limiter and voltage limiter that receives power from the inboard computer in order to power electronics of the outboard computer, and first and second wires connecting the resistor network of the at least one current limiter.

Abstract: A reconfigurable edge computing node of a complex system is provided, the edge computing node including a core module executing selectable core software, and selectable input module(s) and/or output module(s) which can be installed in corresponding input/output ports, wherein each of the input module(s) or output module(s) provides a conduit for moving data to or from the complex system, with selections being chosen from catalogs of available input modules, available output modules, and available core software. The edge computing node provides reconfiguration upon attachment of any input or output module(s), or upon installation of any core software, automatically reconfiguring the edge computing node to enable communication between the core module and the input module(s) and output module(s) using compatible protocols.