23 May 1997 Active control of vibrations of a metal panel by means of piezoelectric actuators and sensors
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Vibration control of flexible structures composed by plates and shells became a serious problem in the last decade. In this paper the noise problem of modern washers is analyzed and a general investigation on the use of thin in-plane piezoelectric actuators and sensors to accomplish active vibration suppression in the lateral panel of an horizontal axis washing machine is performed. Experimental modal identification and validation of a finite element model of the panel is performed. Very high modal density and very low damping and close zero-pole pairs in proximity of each resonance are displayed, making control not an easy task. A digital control strategy is applied in view of a future general application to mass production home-appliance industry taking into consideration the real excitation conditions of a washing machine. The paper describes the experimental apparatus and real-time procedures implemented and discusses results.
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Giorgio Diana, Federico Cheli, Matteo Coppola, Daniel Carroll Conrad, "Active control of vibrations of a metal panel by means of piezoelectric actuators and sensors", Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); doi: 10.1117/12.274676; https://doi.org/10.1117/12.274676

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