Direct drive servo valve based on magnetostrictive actuator: Multi-coupled modeling and its compound control strategy

Abstract In this paper, a multi-coupled model of a direct drive servo valve driven by giant magnetostrictive actuator (GMM-DDV) is established with its constitute hysteresis studied based on Jiles–Atherton model. In order to enhance its tracking performance, a compound control strategy is proposed: a feedforward controller based on the inverse of the hysteresis is employed, a semi-adaptive PID controller optimized by PSO is accompanied with the feedforward controller to deal with the disturbance of the system. The numerical simulation is realized by a joint environment of AMESim and Simulink; the special experimentation system is setup combined a master computer and a control processer based on DSP, the effectiveness of the proposed model and control strategy is valid.

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