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Experiments on structural control of sound transmitted through an elastic plateActive control of sound transmission through an elastic plate has been experimentally studied. The control was applied directly to the plate by point force vibration inputs, and the error information and performance was measured in the radiated acoustic field by discrete microphones. Test cases were studied in which the error sensors were accelerometers mounted on the plate. A time-domain least-mean-squares adaptive algorithm was used as the basis of the control system design. The results showed an impressive increase in plate transmission loss over a wide range of frequencies with a maximum of two control shakers. The advantages of using error information derived from the radiated acoustic field rather than structural response is demonstrated. The mechanisms behind the efficiency of this control approach are discussed.
Document ID
19890066687
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Fuller, C. R.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Silcox, R. J.
(NASA Langley Research Center Hampton, VA, United States)
Metcalf, V. L.
(NASA Langley Research Center; U.S. Army, Aviation Research and Technology Office, Hampton VA, United States)
Brown, D. E.
(Planning Research Corp. Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Acoustics
Meeting Information
Meeting: 1989 American Control Conference
Location: Pittsburgh, PA
Country: United States
Start Date: June 21, 1989
End Date: June 23, 1989
Accession Number
89A54058
Distribution Limits
Public
Copyright
Other

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