Nonlinear dynamic characteristics of MSMA microgripper in harmonic magnetic fields

Microgripper is a basic kind of mechanical structure and used widely in industries of electronics, information technology, optics, medicine, and bio-technology. Shape memory alloy (SMA) micro-gripper has high work outputs, higher power-to-weight ratio and corrosion resistance, which make it to be attractive solutions for handling micro-parts. However, the traditional SMA can only be control through heating and cooling. The low energy efficiency and slow response speed limit its application in engineering fields. Recently, magnetic shape memory alloy (MSMA) has gained considerable attention, as they exhibit special properties such as magnetic shape memory effect and magnetostrictive effect. Based on these properties, MSMA smart structure can be designed to achieve complex action. In this paper, MSMA thin film is introduced to improve the response speed and energy efficiency of microgripper .