Virginia Tech. Department of Mechanical EngineeringBurdisso, Ricardo A.Fuller, Chris R.2015-05-272015-05-271992-07-01Burdisso, R. A., & Fuller, C. R. (1992). Dynamic behavior of structural-acoustic systems in feedforward control of sound radiation. Journal of the Acoustical Society of America, 92(1), 277-286. doi: 10.1121/1.4042910001-4966http://hdl.handle.net/10919/52647The dynamic characteristics of a beam under active control to minimize the coupled sound radiation is investigated. The beam is subjected to a harmonic point force and the resulting radiated field minimized by utilizing a piezoceramic actuator as control input. The error information from the acoustic medium is obtained by placing a single microphone in the acoustic far field. A feedforward control approach is used to derive the optimum control input applied to the actuator. The analysis shows that when the error microphone is placed along a line perpendicular to the radiating surface, the controlled structure has new eigenvalues and eigenfunctions. The controlled system eigenproperties are only a function of the control force location and independent of the disturbance input. A numerical example demonstrates the applicability of the formulation. The numerical results are also corroborated experimentally using a feedforward controller implemented on a TMS320C20 DSP processor.10 pagesapplication/pdfen-USIn CopyrightAcousticsControl systemsMicrophonesRadiation monitoringSurface structureArticle - Refereedhttp://scitation.aip.org/content/asa/journal/jasa/92/1/10.1121/1.404291https://doi.org/10.1121/1.404291