Award Data

The extension of classical frequency domain and wavelet transformation adaptive subband decompositions result in arbitrary time frequency til. The use of a time-varying tree-structured filterbank is proposed to provide a signal dependent transform which is capable of tracking non-stationarities via local reconfigurations. Under stationary assemptions, the filterbank converges to a unitary operat ...

The standard technique for the recording of telemetry data in range operations has been instrumentation tape recording. This has provided the capability for recording data at high data rates for extended periods of time. While convenient for recording, this technique suffers drawbacks in processing and playback of the data. Due to the serial nature of the medium, no capability exists for near-re ...

Astralux is developing heterobipolar transistors (HBT) using a SiC base. This device operates above 500 C with a current gain in excess of 100. Most of the effort went into design, technology, and characterization of these devices. To make the HBT into a commercial product, the technology of contacts and packaging must be developed. This proposal considers a joint project with NAWCAD and a pac ...

Astralux, having recently made the first transistor structure to operate above 500 C with a current gain exceeding 100, proposes to explore the limitations of the transistor's power handling capability. At room temperature, this transistor carries a current density one order of magnitude higher than commercial silicon power transistors. Also it is proposed to study the maximum frequency at which ...

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Preliminary CFDRC assessment indicates the proposed low cost solid fueled Air- Turbo-Rocket (ATR) can exceed current Navy requirements for an affordable supersonic expendable aerial target propulsion system. Existing vehicle/propulsion/trajectory software and system/component design experience will be utilized to refine the proposed ATR engine configuration for U.S. Navy aerial target and missile ...

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A major problem in maintaining complex weapon systems is determining when a particular component needs repairing or replacement. Current diagnostic techniques in practice are often simplistic and can lead to premature replacement of components or, more seriously, failure to replace or service malfunctioning components. Avionics components undergo various stresses that ultimately limit their useful ...