SLIDING MODE BASED CONTROLLER FOR MAGNETOSTRICTIVE ACTUATOR IN PRECISION POSITIONER
Magnetostrictive actuator, for its merits of relatively low voltage and high force, has been increasingly applied in many applications, such as vibration control, aviation, positioner, etc. At low drive level, magnetostrictive actuator presents linearrelation between strain or displacement and input voltage orinput current, while non-linear appears when applied moderateor high drive level. To achieve accurate control for high drivelevel, non-linear, including saturation and hysteresis, must becompensated. Sliding mode control, a robust control scheme,can handle these non-linear. As magnetostrictive actuatormodelled in Jiles-Atherton model, the relation of magnetic fieldH and bulk magnetization M, hysteresis, is divided intoanhysteresis and deviation from anhysteresis. Saturation can be compensated by inversion of anhysteresis (free-hysteresis) and then, hysteresis, represented as the deviation from anhysteresis,is compensated with sliding mode control.
Xinxin Li Wen Wang Zichen Chen
Institute of modern manufacturing, Zhejiang Univ.;Department of Electric and Communication Engineeri Institute of modern manufacturing, Zhejiang Univ.
国际会议
海南三亚
英文
2007-01-10(万方平台首次上网日期,不代表论文的发表时间)