List

ABSTRACT: Hypersonic propulsion systems, such as supersonic combustion ramjets (scramjets) are generally expected to operate from Mach 3.5 up to Mach 7-8 and are designed for specific flight Mach numbers to achieve optimum performance. However, realistic flight vehicles will experience a wide range of flight conditions during a typical mission. These off-design flight conditions degrade the perfo ...

The proposed effort will investigate and develop a laser-scopic tool that will provide earlier and improved capabilities for corrosion-detection, -removal, -cleaning and -repair due to galvanic couples in hard-to-access areas, without damaging the underlying substrate or adjacent features. The key focus areas include system definition, power-delivery, mitigation/elimination of splatter and debris ...

YTP will develop technology that provides a high performance, modular Li-ion battery with: redundant safety features, safer thin, metal case cell designs; fin/micro-channel thermal control system; and an evaporating fluid system that rapidly quenches failing cells to prevent thermal runaway and fratricide. The end goal of the proposal is making a lighter, longer lasting, less expensive, safer JSF ...

Satellite communications are increasingly vulnerable to radio frequency (RF) jamming due to availability of satellite operations information and reduced RF equipment cost. The Air Force seeks a trade study into how a constellation of 5-kg, 10x10x30-cm CubeSats can be used to detect and geolocate RF transmitters operating in the satellite X/Ku/K/Ka/Q frequency communication bands. RRC, together wit ...

Ultra-stable and accurate frequency and timing devices such as atomic clocks are essential for modern communication, navigation, surveillance, and missile guidance systems. There are many atomic oscillators such as neutral calcium and neutral ytterbium that produce clock signal in optical domain. However, these optical standards are expensive and not widely available. The phase stabilized frequenc ...

Analog-to-digital converters (ADCs) are necessary for many applications, including sensors, hardware based radio station, wireless systems, instrumentation, and power. These applications are often used in harsh environments which magnify the difficulty of designing complex ADCs due to the fact that ionizing radiation and even a single ionizing particle can generate charge in the semiconductor cir ...

The critical navigational precision of the nuclear-powered ballistic missile submarine fleet is based on the aging Electrostatically Supported Gyroscope Navigator (ESGN). The increasing frequency of repairs and increasing Mean Time To Repair (MTTR) for ESGN systems have potential to affect mission readiness. Ridgetop Group proposes an Expert Troubleshooting Action System (ETAS) to reduce mean time ...

Silicon Technologies Inc. (STI) proposes to develop a data conversion architecture using radiation hardened ADC and DAC converter technologies. The circuit topology will be based on a fully differential, redundant SAR ADC which utilizes three high speed comparators to enable single clock conversion at 25MHz with 14 bit data conversion. The circuit design will be based on previous research sponsore ...

BTech proposes the design and development of a low-profile, broadband, shear-mode piezocrystal acoustic transducer for deep submergence applications. The Phase I effort considers evaluation of design variants of shear mode transducers with increased pressure operation/tolerance and tradeoffs associated with the same. Design feasibility is supported with calculations of expected performance and whe ...

The Navy and USMC are embarking on an aggressive power and energy program for applications in surface and underwater vehicles as well as expeditionary systems. Limited by either shipboard space and weight or portability, the Navy and USMC require innovative technology solutions to increase electrical energy conversion efficiency and density in order to reduce volume, weight, and cost. The goal o ...