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Electrical Properties and Power Considerations of a Piezoelectric Actuator

Published online by Cambridge University Press:  15 February 2011

T. Jordan ,
Z. Ounaies ,
J. Tripp  and
P. Tcheng
T. Jordan
Affiliation:
NASA-Langley Research Center, Hampton, VA 23681, USA
Z. Ounaies
Affiliation:
ICASE, NASA-Langley Research Center, Hampton, VA 23681, USA
J. Tripp
Affiliation:
NASA-Langley Research Center, Hampton, VA 23681, USA
P. Tcheng
Affiliation:
NASA-Langley Research Center, Hampton, VA 23681, USA
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Abstract

This paper assesses the electrical characteristics of piezoelectric wafers for use in aeronautical applications such as active noise control in aircraft. Determination of capacitive behavior and power consumption is necessary to optimize the system configuration and to design efficient driving electronics. Empirical relations are developed from experimental data to predict the capacitance and loss tangent of a PZT5A ceramic as nonlinear functions of both applied peak voltage and driving frequency. Power consumed by the PZT is the rate of energy required to excite the piezoelectric system along with power dissipated due to dielectric loss and mechanical and structural damping. Overall power consumption is thus quantified as a function of peak applied voltage and driving frequency. It was demonstrated that by incorporating the variation of capacitance and power loss with voltage and frequency, satisfactory estimates of power requirements can be obtained. These relations allow general guidelines in selection and application of piezoelectric actuators and driving electronics for active control applications.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 604: Symposium LL – Materials for Smart Systems III , 1999 , 203
Copyright
Copyright © Materials Research Society 2000

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