Research on inductance model of giant magnetostrictive actuator

The emphasis of this paper is to research the dynamic inductance model of giant magnetostrictive actuator (GMA). First, the relative permeability of giant magnetostrictive material (Terfenol-D) under different pressures and different magnetizations are tested. Then, the inductance parameter of GMA is computed based on the above relative permeability results and the trends of inductance considering relative permeability are concluded. At last, a prototype of GMA is design and manufactured. The static magneto-strain could be 1250ppm and the dynamic response time is about 0.8ms.