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Proceedings Paper

Electrostrictive patches for active vibration control of thin plate host structures
Author(s): Frederic Pablo; Benoit Petitjean
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Paper Abstract

Current applications in active vibration control mainly use piezoceramic actuators (PZT). With the aim of improving vibration absorption, electrostrictive actuators have been elaborated. These electrostrictive ceramics show very attractive properties for active vibration control applications. Yet, their non linear electromechanical behavior tempers these numerous advantages and considerably complicate their use. In usual active vibration control applications, dynamic electric fields with varying magnitudes and frequencies are applied to the ceramic. Earlier measurements, performed at ONERA, show that the ceramic behavior is strongly sensitive to operating parameters (electric field magnitude and excitation frequency, and surrounding temperature). It is demonstrated in this article that this sensitivity can, in fact, be reduced to a sensitivity of the material to its own temperature. Indeed, a significant heating of electrostrictive ceramics occurs when they are subjected to a sinusoidal electric field. This heating turns out to be, itself, dependent on operating parameters. An experimental electric model of stressfree electrostrictive patches is presented, which is then used to develop constitutive relations of these materials. A simplified, dynamical, electromechanical coupled model of distributed electrostrictive patches bonded on a generic thin plate host structure is finally briefly discussed.

Paper Details

Date Published: 22 June 2000
PDF: 12 pages
Proc. SPIE 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems, (22 June 2000); doi: 10.1117/12.388884
Show Author Affiliations
Frederic Pablo, Office National d'Etudes et de Recherches Aerospatiales (France)
Benoit Petitjean, Office National d'Etudes et de Recherches Aerospatiales (France)

Published in SPIE Proceedings Vol. 3985:
Smart Structures and Materials 2000: Smart Structures and Integrated Systems
Norman M. Wereley, Editor(s)

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