Award Data

Helicopter vibration due to nonidentical inertial and aerodynamic properties of rotor blades continues to plague Army aviation maintenance personnel. This vibration manifests itself at the rotor rotational frequency, and is currently controlled through the addition of blade root and tip weights and the bending of trim tabs. Application of Individual Blade Control (IBC) offers the promise of automa ...

Portable fire extinguishing systems such as CO(2), dry powder, and the halons all suffer from the problem that the fire protection system needs to be within a few feet of the fire in order to be effective. Because the limited range of fire extinguish systems, fire fighting always contains an element of danger and is extremely dangerous when the fire occurs in an ammunition storage area. If the r ...

This proposal describes the development of fast video and audio compression and playback routines for full screen, full motion color video and audio suitable for use on the AN/PSM-80(V) Army Contact Test Set-III (CTS-III). The innovation of this approach is based on the integration of video color domain conversion with a modified pyramid transform (GMAI Algorithm) using vector quantization, adapt ...

The short pulse length of ultra wide bandwidth (UWB) radar systems allows them to penetrate dense media such as foliage, thereby permitting battlefield surveillance of artillery and infantry. Due to their short pulse width, the UWB radars are susceptible to interference from FM and AM radio, and television stations. These narrowband interfering signals have to be suppressed to effectively operate ...

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Disability is the nation's largest public health issue; with over 35 million Americans experiencing disability and annual disability-related costs exceeding $170 billion. Planning for the efficient and equitable allocations of state and local rehabilitation services has generally been inadequate, however. Geographic information systems (GIS) approaches have the potential to dramatically improve ...

State-of-the-art Semi-Automated Forces (SAFs) are predictable, non-adaptive, behavoirally distinguishable from manned simulators, and once "figured out", the only remedy for these performance shortcomimgs is a costly rewrite of the behavioral model software. We propose a hybrid SAF control architecture that integrates neural networks with rule-based systems to enable human like learning, allowing ...

Linac Inc., R&D group, proposes a completely new approach to provide Doppler frequency offset for a microwave bandwidth (higher than 16 GHz) laser radar signal. The proposed achromatic optical Doppler frequency modulator (AODFM) system uses existing technology of holographic achromatic phase modulation. The modulation is carried out by specially configured three cascaded gratings. The input and ...

Although vibration analysis has been successfully used to monitor rotorcraft mechanical components, there are problems with system implementation and development which limit the method. Acoustical methods need to be evaluated for aircraft health monitoring on a realtime basis to detect defective mechanical components before failure. Physical Acoustics Corporation proposes to implement both acous ...

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