Award Data

The feasibility of a new approach that will accelerate the modeling of problems involving rarefied gas dynamics is established. The proposed hybrid approach solves the Boltzmann equation directly using a carefully designed discrete-velocity model and adiscrete Monte Carlo collision process with several extensions that accelerates its computational capability in comparison with direct simulation M ...

Research is currently underway to produce guidelines for the development of mission and safety critical systems implemented in Ada 95. This research will analyze whether certain features of Ada 95 should be included or excluded from a critical application. To be of practical value such an analysis will require specific tool support. The Ada Semantic Interface Specification (ASIS) defines a ...

The development of control laws for control of UCAVs in formation requires knowledge of the complete multivehicle dynamical system. This Phase I effort focuses on the design and development of simulation models for multiUCAV situations. During the primary work phase of this effort, a limited wind-tunnel entry in the Langley Full-Scale Wind Tunnel will be performed to demonstrate the ability to m ...

JRM proposes a novel context-dependent, signature-based approach to improve the automation and quality of material-classification of imagery and arbitrary n-channel remote-sensed data. In the Phase I, JRM will design three key components: (1) anautomated N-channel signature-predictive material classification algorithm, (2) a pixel-material spatial-correlation refinement algorithm and (3) an iter ...

Systems Planning and Analysis, Inc. (SPA) propose to systematically analyze, develop, and test a primary rotor control system based on trailing-edge flaps actuated by Magnetic Shape Memory Alloy (MSMA) materials. A comprehensive design effort will beundertaken based on the University of Maryland Advanced Rotor Code (UMARC) to determine full-scale flap actuation requirements (size, stroke, location ...

We propose to build and test an active-passive acoustic absorber for the Scorpius(TM) launch vehicle. The absorber is designed to couple into the first few acoustic modes of the payload fairing cavity. Mechanical designs are tuned to the lowest frequencymode and the higher-frequency modes are attenuated with feedback control. Suppression of the first few acoustic modes will reduce the sound pre ...

By re-examining the basic physics of underwater signal propagation in the context of recently developed notions of state-space methods for dynamical systems, we have formulated a new active sonar signal-processing model. This model is based on morerealistic assumptions about the possible return waveforms, nongaussian noise, clutter and reverberation than existing approaches. Implementing a bank of ...

E-OIR Technologies proposes the design and development of an automated, adaptive chemical exploitation systems (AACES) to support the passive detection and identification of chemical effluents. AACES will leverage proven remote sensing algorithms and adaptthem to the passive Fourier transform spectroscopy (FTIR) problem. This research effort will investigate advanced background discrimination tech ...

The Navy’s Next Generation Surface Search Radar (NGSSR) system simultaneously supports the primary missions of surface search, precision radar navigation, and periscope detection and discrimination (PDD). The NGSSR system achieves these multiple missions through the uses of programmable waveform modes, unique waveform design and scheduling, and software programmability that take advantage of var ...

We propose to investigate the use of Adaptive Vulnerability Analysis (being developed under DARPA contract number F30602-95-C-0282) for analysis of Java applets and applications. Java - a platform-independent, Internet-savvy programming language - has found widespread acceptance and has been adopted for use in critical defense information systems such as the GCCS. It is essential to develop and ...