Adaptive control of magnetostrictive-actuated positioning systems with input saturation

Abstract

Magnetostrictive actuators are high-force low-displacement actuators, which are profitably utilized in many engineering applications such as, high dynamic servo valves, micro/nano-positioning systems and optical systems. Nevertheless, magnetostrictive actuators are subject to hysteresis effects and input saturation, which lead poor system performances, e.g. inaccuracy and strong oscillations. To mitigate these effects, in this paper an adaptive controller with an anti-windup technique is developed. The anti-windup technique is particularly used for dealing with the input saturation effect. The simulation results demonstrate the effectiveness of the proposed controller.