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Proceedings Paper

Active control of vibrations of a metal panel by means of piezoelectric actuators and sensors
Author(s): Giorgio Diana; Federico Cheli; Matteo Coppola; Daniel Carroll Conrad
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Paper Abstract

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.

Paper Details

Date Published: 23 May 1997
PDF: 15 pages
Proc. SPIE 3044, Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies, (23 May 1997); doi: 10.1117/12.274676
Show Author Affiliations
Giorgio Diana, Politecnico di Milano (Italy)
Federico Cheli, Politecnico di Milano (Italy)
Matteo Coppola, Politecnico di Milano (Italy)
Daniel Carroll Conrad, Whirlpool Corp. (United States)


Published in SPIE Proceedings Vol. 3044:
Smart Structures and Materials 1997: Industrial and Commercial Applications of Smart Structures Technologies
Janet M. Sater, Editor(s)

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