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在保证引信勤务安全性和正常发射可靠性前提下,为实现引信小型化而设计了一种新型无源双阈值高g值MEMS惯性开关,其主要包括能够识别两种典型加速度环境(载荷1∶15 000g-300μs,载荷2∶3000g-3ms)的环境识别模块M1和为后续电路可靠供电的通电模块M2。环境识别模块M1主要通过控制带有Z型齿的质量块与对应L型挡块之间的碰撞来确定质量块的运动位移,进而控制通电模块M2的工作情况。基于两种典型加速度环境对MEMS惯性开关进行了动力学仿真并优化,仿真结果表明所设计的开关在载荷1环境下保持断开,而在载荷2环境下可靠闭合。
In order to ensure the fuze miniaturization, a new passive dual-threshold high g-value MEMS inertial switch is designed on the premise of ensuring the service safety and normal transmitting reliability of the fuze. The novel inertial switch includes two types of MEMS inertial switches that can identify two typical acceleration environments (load 1: 15 000g-300μs, load 2: 3000g-3ms), and an energization module M2 for reliable power supply to subsequent circuits. The environment recognition module M1 mainly determines the motion displacement of the mass block by controlling the collision between the mass block with the Z-shaped tooth and the corresponding L-shaped block block, so as to control the operation of the electrifying module M2. The dynamics of MEMS inertial switch are simulated and optimized based on two typical acceleration environments. The simulation results show that the designed switch remains off under load 1 and close reliably under load 2.