引信惯性延期MEMS擒纵机构

A MEMS Inertial Driven Runaway Escapement Mechanism in Fuze

针对传统自推式弹药引信惯性延期安全与解除保险机构尺寸大、集成化程度低的问题,提出了引信擒纵机构惯性延期MEMS安全与解除保险机构。该机构基于微机电系统技术,利用擒纵机构实现惯性延期解除保险动作,采用一组弹簧质量系统实现加速度的识别,满足自持复位、抗干扰、范围解除保险及抗过载等基本功能要求。仿真验证结果表明,在10 g加速度下该机构的理论延期时长为122.8 ms,仿真延期时长为169.6 ms,延期解除保险范围为7.7~13.9 g。验证了卡摆转动惯量及驱动力与擒纵机构延期时长的关系与理论相符,摩擦力及轴间隙的影响均可导致擒纵机构失效,对加速度识别功能的四个运动阶段的加速度作用范围均具有较好的分辨率。该机构能够切实解决自推式弹药引信用火工品在微型化过程中遇到的问题。

In order to solve the problem of the large dimension and lower integration of inertial driven arming delay safety and arming device in traditional self-propelled ammunition fuze,an inertial driven arming delay MEMS safety and arming device based on runaway escapement mechanism was proposed.This device based on MEMS technology released the function of arming delay by the runaway escapement mechanism,and used a mass-spring mechanism to recognize the acceleration.This device can fulfil the requirements of reset,anti-interference,arming delay,anti-overload and so on.As the result of the verified simulation,the theoretical delay time of the device was 122.8 ms and the simulation delay time was 169.6 ms under 10 g acceleration.The arming acceleration range was 7.7~13.9 g.The simulation verified the relationship of the inertia moment and driving force with the delay time corresponding with theoritical results.The effects of friction and shaft clearance could lead the failure of the runaway escapement mechanism.The device had a high resolution for the acceleration range of the four basic motion stages of the acceleration recognition function and solved the problem in self-propelled ammunition fuze pyrotechnics miniaturization process actually.