Abstract:  This paper presented a research work for the dynamic modeling and simulation to a currently realized giant magnetostrictive inchworm linear motor, which provides an effective method to model giant magnetostrictive inchworm linear motor system and to analyze its performance. JilesAtherton model is introduced to compensate the hysteresis errors, and the rolling friction is taken into account in case a heavy load is applied. The feasibility of linear motor design was verified by modeling and simulating. The model was finally verified by experiments in terms of the frequency characteristic and load characteristic of the motor, and the shape of the simulation curve of step size basically matches up to the experimental curve. The dynamic model presented in this research realizes the precise system simulation with various exciting signals and external loads applied, which gives basis for the future structural optimization of the motor and the design of closed loop system.

Key words: linear motor, magnetostrictive, inchworm, precision positioning, dynamic modeling