Simulation on dynamics of giant magnetostrictive actuator based on Matlab

Design, analysis and simulation of magnetostrictive actuator and its application to high dynamic servo valve

“…When current is applied to the magnetostrictive actuator coil, with force balance achieved, the spool will displace to a position proportional to input current. Assuming that the force at the end of the feedback is proportional to its displacement and equating the applied force with all the opposing forces [3,26], it derives,…”