13 June 1997 Dynamic analysis of piezoelectric stack actuators including thermal and pyroelectric effects
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Abstract
Piezoelectric stack actuators have been used in structural acoustic controls, and active vibration isolation systems. In recent tests of heavy duty vibration isolation systems, it has been found that piezoelectric stack actuators under large loadings and high driving voltages can produce substantial heat to cause failure. This paper presents preliminary results of a research effort that was set out to investigate the heat production and thermal effects on the actuator performance In the paper, a general constitutive formulation of piezoelectric materials is presented starting from the first law of thermal dynamics. the constitutive equations involve thermoelastic, pyroelectric and, of course, piezoelectric effect. A variational principle based on Oden's approach is then developed. As a special case, the equations of motion for a circular multilayer stack piezoelectric actuator are derived from the variational principle. Numerical results of blocked force and free stroke of the actuator are presented in the paper. The effects of various parameters on these two common specifications of solid state actuators are studied.
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Dinghui Ye, Jian Q. Sun, "Dynamic analysis of piezoelectric stack actuators including thermal and pyroelectric effects", Proc. SPIE 3039, Smart Structures and Materials 1997: Mathematics and Control in Smart Structures, (13 June 1997); doi: 10.1117/12.276579; https://doi.org/10.1117/12.276579
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