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Journal of Intelligent Material Systems and Structures
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Semi-passive Piezoelectric Structural Damping by Synchronized Switching on Voltage Sources

Elie Lefeuvre

Laboratoire de Génie Electrique et Ferroélectricité, INSA de Lyon, 8 rue de la Physique, 69 621 Villeurbanne Cedex, France, elie.lefeuvre{at}insa-lyon.fr

Adrien Badel

Laboratoire de Génie Electrique et Ferroélectricité, INSA de Lyon, 8 rue de la Physique, 69 621 Villeurbanne Cedex, France

Lionel Petit

Laboratoire de Génie Electrique et Ferroélectricité, INSA de Lyon, 8 rue de la Physique, 69 621 Villeurbanne Cedex, France

Claude Richard

Laboratoire de Génie Electrique et Ferroélectricité, INSA de Lyon, 8 rue de la Physique, 69 621 Villeurbanne Cedex, France

Daniel Guyomar

Laboratoire de Génie Electrique et Ferroélectricité, INSA de Lyon, 8 rue de la Physique, 69 621 Villeurbanne Cedex, France

Semi-passive damping techniques have been developed recently to address the problem of structural damping. Contrary to the standard passive piezoelectric damping, these new techniques adapt to environmental variations. Moreover, they present interesting multimodal damping performances. However, their efficiency is strongly correlated with their electromechanical coupling. The enhanced semi-passive damping technique presented herein compensates for this drawback. It reinforces the electromechanical coupling by artificially increasing the voltage amplitude delivered by the piezoelectric patches. Theoretical predictions and experimental results show a –24 dB attenuation on the vibration of a resonant cantilever steel beam, while reducing the piezoelectric material volume by 83%.

Key Words: structural damping • passive damping • semi-passive damping • piezoelectric device

This version was published on September 1, 2006

Journal of Intelligent Material Systems and Structures, Vol. 17, No. 8-9, 653-660 (2006)
DOI: 10.1177/1045389X06055810
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