ASRI and NASA have developed an innovative tool for ortary equipment condition monitoring that applies acoustic emission technology. The tool is in the form of a computer based instrumentation system that we have designated the Acoustic Emission Bearing Diagnostics System (AEBDS). The system was built and tested under a NASA STTR Phase II program to provide a low-cost, commercially viable acoustic emission bearing fault diagnosis capability. The system implements state-of-the-art high frequency acoustic emission (AE) sensor technology that is coupled with Envelope Analysis (EA) and Point Process Spectral Anlaysis (PPSA) techniuqes for bearing fault detection. The high frequnecy AE signal provides immunity from structural and rotordynamic vibration noise within a turbomachinery system and facilitates the early detection of defects. AE sensors capture the release of energy in the kilohertz to megahertz range emanating from the bearing defect.
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