Tracking control of piezoelectric actuator system using inverse hysteresis model

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II

Article type: Research Article

Authors: Chen, Yuanseng^a | Qiu, Jinhao^{a; *} | Ji, Hongli^a | Zhu, Kongjun^a

Affiliations: [a] The Aeronautic Key Laboratory for Smart Materials and Structures, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudao Street, Nanjing 210016, China

Correspondence: [*] Corresponding author. Tel.: +86 25 84891123; E-mail: qiu@nuaa.edu.cn

Abstract: The intrinsic hysteresis behavior of piezoelectric material limits the tracking control accuracy of the actuators. This paper describes a tracking control method for piezoelectric actuators based on the combination of feedforward and feedback loops. The hysteresis of piezoelectric actuators is linearized in feedforward loop with an inverse hysteresis model based on a neural network. The number of parameters in the neural network based inverse model is relatively small and the parameters are easy to identify. The feedback loop is used to reduce the accumulated error produced by the inverse hysteresis model. The experimental results show that the accuracy is significantly improved in tracking control by using the combination of feedback and feedforward control.

Keywords: Hysteresis, piezoelectric actuators, tracking control

DOI: 10.3233/JAE-2010-1284

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1555-1564, 2010