MEMS闭锁机构离心响应适应性研究  

Optimum Design of MEMS Locking Mechanism

作　　者：孙志龙 聂伟荣[1] 曹云[1] SUN Zhilong;NIE Weirong;CAO Yun(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《探测与控制学报》2023年第3期58-62,共5页Journal of Detection & Control

摘　　要：针对当前微机电系统(MEMS)安全与解除隔离(S&A)装置在离心环境下工作时可能存在锁头回弹剧烈、锁梁应力较高引起塑性变形的问题,提出一种有良好离心响应适应性的MEMS闭锁机构。该闭锁机构通过结构设计减弱了锁头在闭锁时的回弹现象,并提高了锁梁的结构强度,使其能够承载更高的离心载荷,同时扩展了闭锁机构稳定闭锁的阈值范围。该闭锁机构在外弹道离心力作用下可以稳定闭锁并准确定位,从而保证传爆序列可靠对正。通过理论分析,结合有限元仿真与样机实验研究了该闭锁机构的性能与工作特性,研究结果表明,该闭锁机构可以在3500~24000 r/min的离心转速范围内稳定闭锁,闭锁时锁梁不发生塑性变形。Aiming at the current MEMS safety and release isolation(S&A)device working in a centrifugal environment,there may be a problem of severe lock head rebound,high lock beam stress caused by plastic deformation,a MEMS latching mechanism with good centrifugal response adaptability was proposed.The locking mechanism was designed to greatly reduce the rebound of the locking head during locking process,and to improve the structural strength of the locking beam so that it could endure higher centrifugal loads,while extending the threshold range for stable locking of the locking mechanism.The locking mechanism could be locked and accurately positioned under the action of centrifugal force in the external ballistic path,thus ensuring reliable alignment of the blast transmission sequence.The performance and operating characteristics of the locking mechanism were investigated through theoretical analysis,combined with finite element simulation and prototype experiments.The results of the study showed that the locking mechanism could be stably locked within the centrifugal speed range of 3500 r/min to 24000 r/min,and the locking beam did not undergo plastic deformation during locking process.

关 键 词：微机电系统 安全与解除隔离装置 闭锁机构 离心响应 适应性 

分 类 号：TJ430[兵器科学与技术—火炮、自动武器与弹药工程]