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Active control of interior noise in a large scale cylinder using piezoelectric actuatorsThe noise reduction effectiveness of two types of control force actuator models has been analytically investigated: (1) a point actuator, and (2) an in-plane, piezoelectric actuator. The actuators were attached to the wall of a simply supported, elastic cylinder closed with rigid end caps. Control inputs to the actuators were determined such that the integrated square of the pressure over the interior of the vibrating cylinder was a minimum. Significant interior noise reductions were achieved for all actuator configurations, but especially for the structurally dominated response. Noise reduction of 9 dB to 26 dB were achieved using point force actuators, as well as localized and extended piezoelectric actuators. Control spillover was found to limit overall performance for all cases. However, the use of extended piezoelectric actuators was effective in reducing control spillover, without increasing the number of control degrees of freedom.
Document ID
19920023714
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Lester, H. C.
(NASA Langley Research Center Hampton, VA, United States)
Silcox, R. J.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1992
Publication Information
Publication: Fourth Aircraft Interior Noise Workshop
Subject Category
Acoustics
Accession Number
92N32958
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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