A principal problem in the design of safe-arm devices for any munition is to insure that when in safe position certain switches which should be closed, remain closed, and certain switches which should be open, remain open, when the munition is subjected to the various environments of shock,… More

A major problem for surface ship asw is the detection and localization of quite enemy submarine targets which are or may be approaching missile-launch range of a battle group and where own-ship, self-noise or sonar conditions preclude the use of ship sonars. one technique is to drop a pattern of… More

When rotating machinery deteriorates, vibrtion pattersn change. when bearing frequencies appear, then increase in amplitude, bearing failure looms. the same with valves; when they leak, they vibrate. as leakage increases, the vibration pattern changes. there are many others. the key is knowing where… More

When rotating machinery deteriorates, vibration patterns change. The key is knowing where and how deeply to look. Gear mesh frequencies change in amplitude and the slimness or "All of their peaks change, indicating wear. Weakened teeth, due to root cracking or other gear damage,cause detectable… More

When rotating machinery deteriorates, vibration patterns change. The key is knowing where and how deeply to look. Gear mesh frequencies change in amplitude and the slimness or "All of their peaks change, indicating wear. Weakened teeth, due to root cracking or other gear damage,cause detectable… More

Epoch Engineering Incorporated (EEI), the developer of the Robust Laser Interferometer (RLI) for non-contact vibration measurement, has identified a seeded fault test of a prototype gas turbine engine on which to demonstrate their RLI. The F100 engine, developed for the Joint Strike Fighter by… More

In this proposal, Epoch Engineering, Inc. (EEI) and its subcontractor, Intelligent Automation, Inc. (IAI), propose a Fire Prevention Monitoring Capability (FPMC) for assessing the availability of pre-fire and hidden fire Acoustic Emission (AE) information for fire prevention. The first element of… More

Acoustic Emissions (AE) are associated with physical events, such as thermal activity, dielectric breakdown, discharge inception, as well as crack nucleation and growth. Previous empirical experiments have demonstrated that the unprecedented quality of AE measurements available with the Research and… More

Power distribution in legacy systems, including aircraft, has been implemented employing electro-mechanical switching. Advances in technology that enable use of flightworthy, high power, solid state switch technology to replace electro-mechanical power line contactors are available. This… More