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 ...

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 ...

THE U.S. MARINE CORPS HAS A CRITICAL NEED FOR A NEW, STATE-OF-THE-ART SYSTEM FOR ARMAMENT CARRIAGE ON ITS AH-1W ATTACK HELICOPTER. THIS PHASE I EFFORT WILL PERFORM A TRADE/CONCEPTUAL DESIGN STUDY TO SYSTEMATICALLY IDENTIFY THE BEST DESIGN SOLUTION. THE MERITS, COSTS, AND RISKS ASSOCIATED WITH AN INNOVATIVE DESIGN SOLUTION (CONFORMAL WEAPONS PODS) WILL BE COMPARED TO MORE CONSERVATIVE DESIGN SOLUTI ...

THE OBJECTIVE OF THE PROPOSED EFFORT IS TO DEVELOP ADVANCED CAPABILITIES FOR COMPUTER CODES IN PREDICTING THE DAMAGE INFLICTED ON NAVAL TARGETS BY UNDERWATER WARHEADS. THE PROPOSED RESEARCH EFFORT WILL TAKE SOME HIGHLY REGARDED, WELL DOCUMENTED, AND VALIDATED GENERAL PURPOSE CODES AND ADD CAPABILITIES TAILORED TO THE UNDERWATER WARHEAD DYNAMICS PROBLEM AND COMBINE ALL REQUIRED CAPABILITIES INTO ON ...

The Monolithic Analog Signal Conditioner (MASC) project described by NSWC TM 951128 dealt specifically with many of the issues associated with developing a high bandwidth, high dynamic range application specific integrated circuit dedicated to the function of conditioning sensor signals prior to digitization. Since most of the MASC candidate sensor signals are destine to be digitized, there ...

IT IS PROPOSED TO INVESTIGATE AND DEVELOP INNOVATIVE PROPELLER BLADE SECTION GEOMETRY WHICH WILL RESULT IN IMPROVED ACOUSTIC AND POWERING PERFORMANCE OF SURFACE SHIPS THROUGH THE ATTAINMENT OF HIGHER CAVITATION INCEPTION SPEEDS AND REDUCE BLADE DRAG. THESE SECTIONS ARE CHARACTERIZED BY A BLUNT TRAILING EDGE WITH A SEPARATED, NONCAVITATING WAKE. THE EFFECT OF THE BLUNT TRAILING EDGE, WHEN COUPLED W ...