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Active control of sound transmission/radiation from elastic plates by vibration inputs. I - AnalysisActive control of sound radiation from vibrating plates by oscillating forces applied directly to the structure is analytically studied. The model consists of a plane acoustic wave incident on a clamped elastic circular thin plate. Control is achieved by point forces, and quadratic optimization is used to calculate the optimal control gains necessary to minimize a cost function proportional to the radiated acoustic power (the transmitted field). The results show that global attenuation of broadband radiated sound levels for low to mid-range frequencies can be achieved with one or two control forces, irrespective of whether the system is on or off resonance. The efficiency of the control strategy is demonstrated to be related to the nature of the coupling between the plate modes of response and the radiated field.
Document ID
19900047021
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fuller, C. R.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Date Acquired
August 14, 2013
Publication Date
January 8, 1990
Publication Information
Publication: Journal of Sound and Vibration
Volume: 136
ISSN: 0022-460X
Subject Category
Acoustics
Accession Number
90A34076
Funding Number(s)
CONTRACT_GRANT: NAG1-390
Distribution Limits
Public
Copyright
Other

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