针对金属基 MEMS 后坐保险机构在高冲击环境下的作用可靠性问题，采用瞬态动力学方法对MEMS后坐保险机构在发射和跌落环境下的失效模式进行了仿真及马希特锤冲击试验。仿真和试验结果表明，在发射环境下，当 MEMS后坐保险机构的卡头进入卡槽时，在卡头翼片的转弯处会产生较大的塑性变形，易造成卡头不能被可靠锁定的失效模式；在跌落环境下，由于弹簧上端拐角处发生了较大的塑性变形，使后坐滑块不能在弹簧回复力的作用下恢复原位，导致后坐滑块已实际解除对离心滑块的约束。最后，对 MEMS后坐保险机构中易产生塑性变形的原因进行了分析。%In order to examine the action reliability of metal MEMS setback arming device under high impact en-vironment,the instantaneous-dynamics was utilized to simulate the motion specific of setback arming device in launching environment and falling off environment,and MEMS setback arming devices was undertaken Maxite impact test.The research results showed that the blocking head could not be locked reliably because of large plastic deformation in launching environment.The corners of spring occur big plastic deformation under falling off environment,which led to the spring stretch,made the slipper unable to comeback original state and centrif-ugal slipper unfreezing.Finally,the reason of failure models of the MEMS setback arming device was analyzed.
展开▼
