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Precise tracking control of piezoelectric actuators based on a hysteresis observer |
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| Authors: | D H Ji J H Koo W J Yoo Ju H Park |
| Institution: | 1. Mobile communication Division, Digital Media and Communications, Samsung Electronics, Co. Ltd., Maetan-dong, Suwon, Gyeonggi-do, 416-2, Korea 2. Research & Development Division, Hyundai Motor Group, Yong-in, Republic of Korea 3. Nonlinear Dynamics Group, Department of Electrical Engineering, Yeungnam University, 214-1 Dae-Dong, Kyongsan, 712-749, Republic of Korea |
| Abstract: | In this paper, a precise tracking control method for piezoelectric actuators based on a hysteresis observer is considered. A nonlinear observer to estimate the hysteretic nonlinearity in the piezoelectric actuator is designed, and then the hysteretic nonlinearity is compensated for by a feedforward control. The proposed observer is easy to design and has better performance compared to the previous work presented in the literature. A feedback controller is also designed to track reference signals. A numerical simulation is presented to verify the method proposed. |
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