Computing of output of piezoelectric actuator under voltage excitation

Yongfeng Fang , Kong Fah Tee , Yong Yan

Abstract

It is difficult to calculate the output force of a single-layer piezoelectric actuator under voltage excitation. In this paper, the piezoelectric actuator is organically combined with the mass-spring-damping system, and the deformation of the piezoelectric actuator under voltage excitation is transformed into the displacement of the mass-spring-damping system. Then, according to the differential equation of the system, the formulae of the mechanical output of the piezoelectric actuator under sinusoidal alternating current and DC step excitation are obtained by using the Laplace change and the inverse change, respectively. Finally, the proposed equations are verified by using ceramic piezoelectric actuators and PVDF actuators, respectively. The results are compared with the existing ones, which shows that the proposed method is feasible, easy, and practical.

Key Words

actuator; damping; output force; piezoelectric; voltage excitation

Address

(1) Yongfeng Fang, Yong Yan — Ningxia Normal University, School of Physics and Electric Information, Guyuan 756000, China
(2) Kong Fah Tee — Department of Civil and Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
(3) Kong Fah Tee — Interdisciplinary Research Center for Construction and Building Materials, KFUPM, Dhahran 31261, Saudi Arabia.

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