Smooth Impact Drive Mechanism using Iron-Gallium Alloy

摘要

This paper presents positioning device using Iron-Gallium alloy (Galfenol). Galfenol is a machinable magnetostrictive material with magnetostriction more than 200ppm, Young's modulus of 70GPa and high permeability. The actuator, a rod of Fe-Ga with winding coil with housing, is simple, low voltage driving and high efficiency. In this paper, we describe the configuration of the positioner and demonstrate the performance. The movement is based on the smooth impact drive mechanism, where the frictionally supported mass is moved step by step by inertia force with the rapid expansion and slow contract of the magnetostrictive actuator.