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Proceedings Paper

Comparsion of electrostrictive and piezoceramic actuation for vibration suppression
Author(s): Michael L. R. Fripp; Nesbitt W. Hagood
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Paper Abstract

Electrostrictors are often avoided in structural control applications due to the non-linearity and temperature sensitivity of the electro-mechanical coupling. This paper describes control techniques so that constant performance is obtained from an electrostrictor in a feedback control system at temperatures ranging from 5 degree(s)C to 57 degree(s)C and at field levels ranging from 90 V/mm to 950 V/mm. The control techniques are experimentally implemented on a cantilevered beam with a 0.9 MN - 0.1 PT electrostrictor. With output linearization and temperature-gain scheduling, the electrostrictive system reduces the RMS strain vibration by 61%. An identical system with a G-1195 piezoceramic controller is used for comparison. The piezoceramic system reduced the strain vibrations by 55% which was robust to temperature variation but not robust to variations in the bias field. Extensive unconstrained wafer characterization as a function of temperature is also presented in the context of relevant constitutive equations.

Paper Details

Date Published: 8 May 1995
PDF: 15 pages
Proc. SPIE 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems, (8 May 1995); doi: 10.1117/12.208272
Show Author Affiliations
Michael L. R. Fripp, Massachusetts Institute of Technology (United States)
Nesbitt W. Hagood, Massachusetts Institute of Technology (United States)

Published in SPIE Proceedings Vol. 2443:
Smart Structures and Materials 1995: Smart Structures and Integrated Systems
Inderjit Chopra, Editor(s)

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