Abstract: Research on dynamic characteristics of giant magnetostrictive thin films is crucial important for further description of its kinemics behavior of micro mobile mechanism, therefore a new method about its dynamic characteristics analysis on giant magnetostrictive thin films is proposed , whose principle is to analyze its dynamic behavior of giant magnetostrictive thin films based on force oscillation theory, by establishing its force oscillation model on which equivalent drive torque, converted from magnetostrictive drive stress, is exerted based on equivalent deformation of compound magnetostrictive thin films beam. Simulations and experiments on the model show its effectiveness to describe the dynamic behavior of giant magnetostrictive thin films. This method has significance for reference to its dynamics analysis, as well as structural design and optimization as finally to realize its close-up control on giant magnetostrictive thin films actuator by magnetic field sensor.

Key words: Dynamic characteristics, Dynamic model, Equivalent torque, Giant magnetostriction thin films