Piezoelectric stack is usually used as actuator mechanism for precise instruments in practical engineering.Nevertheless, hysteretic effect which is carried by piezoelectric materials can degrade the control performance dramatically.For improving control precision, the problem of robust tracking control for piezoelectric actuators (PEAs) was investigated in this paper.First, in order to compensate the hysteretic effect, a new observer was proposed.The design of the observer has considered the uncertainties and the exogenous disturbance in the PEAs system.By utilizing the Laypunov function and the linear matrix inequalities (LMIs) technique, the observers can asymptotically estimate the hysteretic output with H∞ performance.Second, a fault-tolerant controller based on the back-stepping control theory was established.The design of the controller has considered the observation error, and it has certain robustness.At last, simulation and experiment were carried out to verify the effectiveness of the proposed methods.
胡佳明,朱晓锦,方昱斌,高志远,苗中华. 基于迟滞观测器的压电堆补偿控制[J]. 振动与冲击, 2021, 40(4): 81-86.
HU Jiaming,ZHU Xiaojin,FANG Yubin,GAO Zhiyuan,MIAO Zhonghua. Compensation control for piezoelectric stack based on a hysteretic observer. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(4): 81-86.
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