NASA NTRS · 19700000406
Artificial-feedback system
Abstract
System suppresses spurious sinusoidal responses of any sinusoidally driven amplifier showing time-dependent phase shift versus frequency function. System is applicable to any sinusoidally driven amplifier. Technique eliminates, or reduces, unwanted spurious vibrations during tests to determine dynamic frequency responses of mechanical systems.
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Sutton, J. F.. 1970-11-01. Artificial-feedback system. https://ntrs.nasa.gov/citations/19700000406
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