Active structural acoustic control of broadband disturbances

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dc.contributorVirginia Tech. Center for Intelligent Material Systems and Structures. Interdisciplinary Center for Applied Mathematicsen
dc.contributor.authorBaumann, William T.en
dc.contributor.authorHo, Fu-Shengen
dc.contributor.authorRobertshaw, Harry H.en
dc.contributor.departmentCenter for Intelligent Material Systems and Structures (CIMSS)en
dc.date.accessed2015-05-12en
dc.date.accessioned2015-05-14T14:51:13Zen
dc.date.available2015-05-14T14:51:13Zen
dc.date.issued1992-09-01en
dc.description.abstractA control design technique is developed to actively suppress the acoustic power radiated from a structure, with negligible fluid loading, that is persistently excited by narrow-band or broadband disturbances. The problem is constrained by the assumption that the far-field pressure cannot be measured directly. A method for estimating the total radiated power from measurements on the structure is developed. Using this estimate as a cost function and assuming knowledge of the spectrum of the disturbance, a controller is designed using the linear-quadratic-Gaussian (LQG) theory to minimize the cost. Computer simulations of a clamped-clamped beam show that there is a significant difference in the total radiated power between a system with a vibration-suppression controller and a system with an acoustic controller that accounts for the coupling of these vibrations to the surrounding fluid. In some cases, the acoustic controller increases the system vibration in order to minimize the radiated power.en
dc.description.sponsorshipUnited States. Defense Advanced Research Projects Agencyen
dc.description.sponsorshipUnited States. Office of Naval Research - Grant ONR-00014-88-K-0721en
dc.format.extent8 pagesen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationBaumann, W. T., Ho, F. S., & Robertshaw, H. H. (1992). Active structural acoustic control of broadband disturbances. Journal of the Acoustical Society of America, 92(4), 1998-2005. doi: 10.1121/1.405250en
dc.identifier.doihttps://doi.org/10.1121/1.405250en
dc.identifier.issn0001-4966en
dc.identifier.urihttp://hdl.handle.net/10919/52281en
dc.identifier.urlhttp://scitation.aip.org/content/asa/journal/jasa/92/4/10.1121/1.405250en
dc.language.isoen_USen
dc.publisherAcoustical Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectControl systemsen
dc.subjectComputer simulationen
dc.subjectControl theoryen
dc.subjectPressure measurementen
dc.subjectStructural acousticsen
dc.titleActive structural acoustic control of broadband disturbancesen
dc.title.serialJournal of the Acoustical Society of Americaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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