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Adaptive spatio-temporal filtering methods are proposed which are inherently suitable to utilizing many sensors and actuators to achieve superior control and monitoring of structures for vibration and shape control and damage detection. When utilizing large numbers of sensors and actuators, failure detection and failure recovery become important issues. The adaptive spatio-temporal filtering metho ...

Silicon carbide materials will revolutionize semiconductor devices for military and commercial markets. The material's wide bandgap, high electric field breakdown, high thermal conductivity give SiC capabilities that far exceed those of silicon or gallium arsenide. Despite significant progress in silicon carbide development, fundamental defects--most prominently micropipes--persist. If SiC is to s ...

The properties of single-crystal silicon carbide are such that electronics devices from this material have demonstrated remarkable performance characteristics. Despite the material's promise, the material has not yet found acceptance in mainstream device markets because of the material's high cost, among other reasons. This Phase I SBIR proposes an SiC source powder with unique properties which wi ...

Strait pointing accuracy for the antenna and reflector of spacecraft requires structural materials with excellent stiffness and dimensional stability. Carbon-carbon (C/C) composites are prime materials for space applications because of their unique properties. Current C/C processing techniques are very expensive and time consuming. This Phase I research proposes a new class, low-cost graphitic mic ...

A novel technological approach was recently devised by Sumi Tech engineers to fabricate multilayer electronic components, which enables the manufacture of devices with very high volumetric efficiency and reliability. Inexpensive electrode materials such as copper, or aluminum are potential candidates, since the process takes place at relatively low ambient temperature (e.g., less than 400 C), thus ...

BIMODAL REACTORS FOR POWER AND PROPULSION HAVE LONG BEEN OF INTEREST FOR MISSIONS REQUIRINGS BOTH HIGH POWER AND LARGE DELTA-V; E.G., HIGH ALTITUDE, GEOSYNCHRONOUS AND PLANETARY MISSIONS. IT PROPULSIVE THRUST AND ELECTRIC POWER CAN BOTH BE SUPPLIED FROM THE SAME UNIT, A LARGE POTENTIAL SAVINGS CAN OCCUR. SUCH A REACTOR CAN BE DEVELOPED FROM A URANIUM CARBIDE FUELED THERMIONIC REACTOR WITH SINGLE C ...

High power diode-pumped 2 micron lasers are of great interest for a variety of lidar applications, including long range hard target tracking and space-based coherent laser radar systems operating in the eye-safe region of the spectrum. Lidar modeling suggests that 0.5-1 J/pulse energies at pulse repetition frequencies of about 40 Hz will be sufficient to meet many lidar mission requirements. CTI h ...

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THE PROPOSED RESEARCH ATTEMPTS TO DEVELOP AN ADVANCED CAPACITOR USING SiC FOR HIGH TEMPERATURE (400 0C), HIGH POWER, AND HIGH DENSITY ELECTRONIC COMPONENTS FOR AIRCRAFT OR AEROSPACE APPLICATION. THE CONVENTIONAL CAPACITOR CONSISTS OF A LARGE NUMBER OF METALLIZED POLYSULFONE FILM CAPACITORS IN PARALLEL ENCLOSED IN A HERMETICALLY SEALED METAL CASE. PROBLEMS WITH ELECTRICAL FAILURE THERMAL FAILURE AN ...