Decentralized harmonic control of sound radiation and transmission by a plate using a virtual impedance approach

被引：0
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作者：
Quaegebeur, Nicolas [1 ]
Micheau, Philippe [1 ]
Berry, Alain [1 ]
机构：
[1] Department of Mechanical Engineering, Universit de Sherbrooke, 2500 Boulevard Université, Sherbrooke, QC J1K 2R1, Canada
来源：
Journal of the Acoustical Society of America | 2009年 / 125卷 / 05期
关键词：
The problem under study in this article is the active control of sound transmission and radiation of a panel under a periodic excitation. The control strategy investigated uses independent control loops between an individual polyvinylidene fluoride (PVDF) sensor and an individual lead zirconate titanate (PZT) actuator. The specific approach employed here uses the concept of virtual impedance. The aim is to determine for each frequency the optimal impedance between each PVDF sensor and the corresponding PZT actuator in order to reduce the sound power radiated by the plate. Theoretical predictions are compared to measurements of the sound radiated and transmission loss of a panel mounted with eight PZT-PVDF units. Reductions of up to 20 dB of the acoustic power can be achieved around mechanical resonances of the system; while the control strategy has little effect for off-resonance excitations. © 2009 Acoustical Society of America;
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Journal article (JA)
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页码：2978 / 2986
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