A rate-dependent hysteresis model for giant magnetostrictive actuators using the dynamic weight and dynamic threshold based modified Prandtl-Ishlinskii model

The rate-dependent hysteresis in giant magnetostrictive actuators(GMA) is a major impediment to the engineering application. In this paper, a rate-dependent modified Prandtl-Ishlinskii(RDMPI) model is proposed to characterize the rate-dependent hysteresis nonlinearity of GMA. The new model is based on the modified Prandtl-Ishlinskii(MPI) model combined with the dynamic weight and dynamic threshold. Simulation results show that the proposed model effectively represents the characterization of the GMA's rate-dependent hysteresis nonlinearity within a range of frequency.