A fast compensation algorithm for real-time control of magnetostrictive actuators

Applications of magnetostrictive materials in smart devices spread from micro-positioning to active compensation of mechanical vibrations. In non-static conditions, several dynamic phenomena affects the transducer's behavior. Therefore, the design of the control system requires accurate modelling of either the static magneto-elastic constitutive relationship and rate-dependent behavior. Also when dynamic effects are not negligible, compensation of rate-independent (hysteresis) phenomena plays a key role when real-time control task are of concern. In the paper a new approach to hysteresis compensation is described. The basic properties, either in terms of accuracy and computational efficiency, are analyzed and compared to other approaches.