摘要引信储备电源在引信使用时需要安全可靠接通,一般通过利用引信发射过程的惯性环境,当加速度达到或超过闭合阈值时,电磁驱动机构动作实现开关的稳态闭锁,保证开关稳定接通电路
本文首先论述电磁驱动加速度开关MEMS机构的发展现状,基于目前现状,提出了一种开关结构设计方案。其主体尺寸为 ,工作载荷下的触头位移为1.76mm,干扰窄脉冲作用下的触头位移为1.57mm,开关具有较好的抗干扰能力。20758
本文将系统分为弹性体部件与永磁吸附部件,经由静态载荷理论分析、ANSYS动态仿真分析、优化设计等三大主要步骤,以实现开关的阈值性、功能可靠性和抗窄脉冲干扰冲击的性能。
最后考虑开关触点接触可靠性,稳态闭锁性,设计触头的机械尺寸等特性,以满足功能可靠性。
关键词 MEMS,弹性体部件,永磁吸附部件,静态载荷理论分析,ANSYS 毕业论文设计说明书(论文)外文摘要
Title A MEMS mechanism design of electromagnetic driving and
holding acceleration switch
Abstract
Fuze reserve power needs safe and reliable contact when it is turned on, Generally, using the fuze inertia launch process, inertia institution detects the closure threshold of the acceleration switch. When the acceleration reaches or exceeds the closure threshold, electromagnetic driving mechanism finishes the operation of steady latch.
Firstly, this paper discusses the current development of electromagnetic driving MEMS acceleration switch. According to the current statement of the research, a specific research design is proposed. The size is , contact displacement under the work load is , contact displacement under the narrow pulse is 1.57mm. That is to say, the switch has good anti-interference ability.
The system is pided into elastic component and permanent magnets components, Through the theoretical analysis in static load, ANSYS dynamic simulation analysis and optimized design, the switch can achieve the performance of threshold, functional reliability and resistance to narrow pulse.
Finally, to meet the functional reliability, the reliable contact, steady-closure and mechanical dimension of contact are considered.
Keywords: MEMS, elastic component, permanent magnets component, theoretical analysis in static load, ANSYS
目 录
1绪论 1
1.1课题研究的背景与意义 1
1.2 MEMS加速度开关的应用与发展 1
1.3 本论文主要研究的工作 2
2开关结构总体概述 4
2.1功能综述 4
2.2工作原理 4
2.3开关结构初步设计 5
2.4本章小结 5
3 MEMES开关结构功能部件设计 6
3.1弹性体部件初步设计 6
3.2弹性体部件优化设计 17
3.3永磁吸附部件初步理论分析 23
3.4本章小结 26
4 MEMES开关整体结构功能匹配分析 28
4.1开关机构综合结构分析 28
4.2开关机构触点分析 30
4.3本章小结 31
5个人小结与展望 32
结 论 33
致 谢 34
参考文献35