Award Data

THIS PROPOSAL PRESENTS AN INNOVATIVE APPROACH TO DETERMINING THE PROPAGATION PATH OF ACOUSTIC DATA RECEIVED BY A THIN LINE TOWED ARRAY. WE MAKE USE OF THE LATEST DEVELOPMENTS IN SEAFLOOR ACOUSTIC MODELING CAPABILITY AS WELL AS EMPLOYING THE EMERGING AND POWERFUL TECHNIQUES ASSOCIATED WITH ARTIFICAL NEURAL NETWORKS. THE PROPOSED NEURAL NETWORKS WILL BE DESIGNED TO IDENTIFY THE PATH OF PROPAGATION F ...

DDL OMNI Engineering proposes to design a secure system for the continuous, real time acoustic measurement of towed array position relative to the host submarine. By using focused transmit and receive assemblies, pseudo- random spread broadband signals, and relatively high carrier frequency, the transmission level will be minimized so as to be virtually undetectable by a non-dedicated system ...

Composite materials find increasing importance as structural materials for modern lightweight and low cost aircraft. Structures using composite materials essentially rely on the integrity of adhesive bonds for their structural stability. A major limitation in employing composites in critical structures is that the existing methods of testing the integrity of structures are not adequate to a ...

The overall objective of the proposed research is to develop bistatic detection techniques for shallow water near land warfare operations. The focus of our proposed research is to achieve detection enhancement in environments characterized by dense multipath through application of optimal detection theory coupled with accurate acoustic modeling. The first specific objective is to consider alternat ...

This project proposes preliminary investigations to prove the feasibility of four techniques for improving Adaptive Beamforming performance in littoral environments. Emphasis is placed on tradeoffs between algorithm efficiency and performance. The littoral acoustic environment is characterized by near and far field targets and dense dynamic near and far field directional interference at man ...

Amron and its subcontractor BBN propose to show the feasibility of a broadband time-domain adaptive beamformer (ABF) to suppress uncorrelated narrowband sources and multipaths from correlated impulsive sources. The work is motivated by political developments which have emphasized warfare in littoral areas, where a key problem facing active sonar is scattering from topographic features. Activ ...

We have designed an innovative adaptive-optics system to provide correction for laser beam distortion by large atmospheric turbulences such as in an aircraft boundary-layer. The adaptive-optics design is applicable to laser-based infrared countermeasure systems, laser rangefinders, and laser target designators. Our design is a new approach that specifically address large-scale turbulence in t ...

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Southwest Sciences will develop a novel fire detection technology based on optical spectroscopy, using diode lasers and fiber optics. Rapid, quantitative detection of part per million concentrations (or better) of multiple gases, including carbon monoxide, carbon dioxide, hydrogen cyanide, hydrogen chloride, and a fiber optical distribution network permits one laser to be used for at least 800 di ...

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