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System Detects Vibrational InstabilitiesSustained vibrations at two critical frequencies trigger diagnostic response or shutdown. Vibration-analyzing electronic system detects instabilities of combustion in rocket engine. Controls pulse-mode firing of engine and identifies vibrations above threshold amplitude at 5.9 and/or 12kHz. Adapted to other detection and/or control schemes involving simultaneous real-time detection of signals above or below preset amplitudes at two or more specified frequencies. Potential applications include rotating machinery and encoders and decoders in security systems.
Document ID
19900000213
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Bozeman, Richard J., Jr.
(NASA Lyndon B. Johnson Space Center, Houston, TX.)
Date Acquired
August 14, 2013
Publication Date
May 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 5
ISSN: 0145-319X
Subject Category
Electronic Systems
Report/Patent Number
MSC-21408
Accession Number
90B10213
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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