Analysis Method for Ni-Mn-Ga Magnetic Shape Memory Alloy Linear Actuator Using Play Hysteresis Operator

抄録

　Ni-Mn-Ga magnetic shape memory alloy is a prospective material for actuation because it exhibits large magnetic field induced strain at high frequency. However, it also displays strong hysteresis in the strain-magnetic field curve, and the hysteresis property makes it difficult to control the strain in the actuator use. This paper describes the analysis method for the linear actuator made from Ni-Mn-Ga magnetic shape memory alloy in order to predict the magnetic field induced strain. In the proposed method, the coupled analysis of finite element method is used with the play hysteresis operator. The results of the simulation are compared with the measurements on a prototype of the actuator.