• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2019, Vol. 55 ›› Issue (14): 178-185.doi: 10.3901/JME.2019.14.178

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Hysteresis Nonlinear Analysis and Its Compensation Method of MFC Actuator

LIU Kuan1,2, ZHAO Zishu1,2, WU Wenhua1,2, ZHOU Wenya3, WANG Xiaoming3   

  1. 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024;
    2. Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024;
    3. School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116024
  • Received:2018-09-15 Revised:2019-03-15 Online:2019-07-20 Published:2019-07-20

Abstract: As a new of piezoelectric fiber composite actuators, MFC (macro fiber composite) is widely used in active vibration and deformation control of engineering structures due to the advantages of fast response, high electromechanical energy conversion efficiency, good encapsulation, strong environmental adaptability, etc. However, the intrinsic hysteresis nonlinearity of piezoelectric material affects the driven efficiency and the control accuracy. The cantilever beam driven by MFC actuator is taken as the research object. The PI (Prandtl-Ishlinskii) hysteresis model and the modified PI hysteresis model are established based on experimental data. And then, an inverse compensation hysteresis model is developed for active control. The accuracy and the inverse compensation effect of two present models are analyzed and compared by experimental tests. The experimental results indicate that the modified PI hysteresis model have the better compensation effect for the hysteresis nonlinearity of the MFC actuator. The fitting displacement of the compensated PI inverse model compensation control is 2.14 times that of the displacement without the voltage compensation control, and is 1.56 times the displacement of the PI inverse model compensation control. The proposed research strategy of hysteresis nonlinearity can be extended to the analysis of hysteresis behavior of other piezoelectric materials.

Key words: hysteretic nonlinearity, inverse compensation control, macro fiber composite (MFC), modified PI hysteresis model

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