一种力学环境适应性强的石英振梁加速度计结构研究  

Study on a Quartz Vibrating Beam Accelerometer Against Strategic Adaptability in Mechanical Environment

作　　者：张宇航 王文一 李思源 秦琦 熊鑫 刘嘉威 ZHANG Yuhang;WANG Wenyi;LI Siyuan;QIN Qi;XIONG Xin;LIU Jiawei(Xi’an Aerospace Precision Electromechanical Research Institute,Xi’an 710100)

机构地区：[1]西安航天精密机电研究所,西安710100

出　　处：《导航与控制》2024年第3期27-33,共7页Navigation and Control

基　　金：国家重点研发计划(编号:2021YFB320150X)。

摘　　要：石英振梁加速度计是未来高精度、战略惯导级加速度计的发展方向,惯性导航用加速度计对单表的环境适应性要求较高,导弹、火箭在发射瞬间产生的巨大过载冲击对加速度计的力学可靠性提出更高要求。振梁加速度计在复杂环境下的适应性与战略型号需求有差距,因此目前国内战略型号未使用。针对型号使用过程中的大过载、大冲击条件,基于石英挠性加速度计技术成熟度高的质量块设计思想,提出了双梁摆舌、四爪固定的新型振梁加速度计结构,完成了设计结构的高精密装配方案设计;以具体冲击试验谱型为依据,对设计结构进行仿真试验,得到质量块在冲击条件下的最大位移与最大应力。仿真试验表明,加速度计具备抗输入4500 g高过载、大冲击响应谱能力;基于力锤冲击法试验得到,设计的石英振梁加速度计在减震条件下可承受600 g的冲击,提高了相关报道中只能承受400 g的力学冲击能力,解决了石英振梁加速度计在应用中抗力学性能差的问题。Quartz vibrating beam accelerometer is the future development direction of high-precision strategic inertial navigation class accelerometer.Inertial navigation accelerometers have high requirements for the environmental adaptability of a single meter.The impact response of missiles and rockets generated at the launch moment and the huge overload impact put forward higher requirements for the mechanical reliability of accelerometers.The adaptability in complex environments of strategic model have a gap.strategic models are not used at present.In view of the large overload and large impact conditions during the use of the model,mass block design idea based on quartz flexible accelerometer with high technical maturity,a new vibrating beam accelerometer structure with double beam swinging tongue and four paws fixed is proposed.The high precision assembly scheme design of the structure is completed.Based on specific impact test spectrum,the design structure is simulation,the maximum displacement and stress of the mass block under the impact condition are obtained.The simulation results show that the accelerometer has the capability of resisting high overload and large impact spectrum of input 4500 g,based on the force hammer impact test,the designed accelerometer can withstand 600 g impact under damping conditions,enhance withstand 400 g of mechanical impact in related report,to solve the problem of poor resisance of quartz vibration beam accelerometer in application.

关 键 词：石英振梁加速度计 结构设计 力锤冲击法 数值仿真 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]