Optimization and simulation of MEMS safety and arming device for the fuze

Abstract

The present study is centered around the micro actuator, which uses the microelectromechanical system (MEMS) technology in the safety and arming (S & A) device for the fuze. In a complex fuze system, we propose a design optimization scheme for arming based on the conventional disc-type micro electromagnetic actuator. The working principle of this S &A device is first introduced in brief. Then theoretical numerical calculation is performed and finite element simulation software is used for simulation. It is found that as compared with the conventional micro electromagnetic actuator, the electromagnetic force required by the lock pin of this new actuator during unlocking of the lock pin decreases by 41%. Thus the jamming problem of lock pin during the working process of the micro electromagnetic actuator is well solved. This S&A mechanism enhances the reliability of fuze. The present study lays the basis for the design of a micro electromagnetic actuator used in MEMS.