HYSTERESIS NONLINEARITY MODE- LING AND CONTROL OF GIANT MAGNETOSTRICTIVE ACTUATOR

Jia Zhenyuan  Wang Fuji  Zhang Ju  Guo Lisha

(Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024)

Abstract: Aiming at the problems on hysteresis nonlinearity of GMM——giant magentostrictive actuator, the hysteresis model of GMM is set up using Priesach theory model. According to its anti-model, the feedforward compensator, adaptive algorithm of hysteresis model and the parameters of  feedforward compensator adjusting dynamically are designed, which realizes to compensate and control the hysteresis nonlinearty of GMM finally. The results of simulation and test show that this model can be very good at depicting the hysteresis nonlinearity of GMM, and adopted adaptive algorithm is improved effectively hysteresis nonlinearity of displacement exported by GMM, has reduced the non-linear error of the system and has improved the control precision of GMM.

Key words: Giant magnetostrictive actuator  Hysteresis nonlinearity  Priesach model  Feed-forward control

CLC No: TP273.5

国家自然科学基金(50275021)和辽宁省科学技术基金(20032121)资助项目. Received 20040808, received in revised form 20050214