微惯性测量单元橡胶减振器结构设计  

Structure Design of a MIMU Rubber Isolator

作　　者：吝海锋[1] 沈超群 杨拥军[1] 沈路[1] 王宁 刘译允 Lin Haifeng;Shen Chaoqun;Yang Yongjun;Shen Lu;Wang Ning;Liu Yiyun(The 13th Research Institute, CETC, Shijiazhuang 050051, China)

机构地区：[1]中国电子科技集团公司第十三研究所

出　　处：《微纳电子技术》2018年第5期338-344,共7页Micronanoelectronic Technology

摘　　要：为减小外部环境的振动和冲击对微惯性测量单元（MIMU）的输出的影响,基于减振器六种隔振模式理论和单自由度系统无阻尼自由振动原理,选择合适的隔振模式并分析了MIMU橡胶减振器谐振频率的影响因素。通过构建有效的有限元模型分析MIMU减振结构的频率响应,并调整减振器内环、外环结构及减振橡胶的材料硬度等因素,设计得到了一种MIMU橡胶减振器结构。最终,通过对含减振结构的MIMU样机进行扫频振动实验,实验结果与预期设计结果一致。实验结果表明,该结构不仅减少了MIMU受内部和外部振动源的干扰,还实现了减振系统的三向等刚度。研究工作为MIMU橡胶减振器设计提供了有效可行的方法。Based on the theory of six kinds of vibration isolation patterns of the isolator and the principle of damped-free vibration theory of the single degree of freedom（DOF）,the suitable mode of the vibration isolation was selected and the influencing factors of the resonance frequency of micro inertial measurement unit（MIMU）rubber isolators were analyzed in order to reduce the influences of the vibration and impact of the external environment on the output of the MIMU.A structure of the MIMU rubber isolator was designed through establishing an effective finite element model to analyze the frequency response of the MIMU rubber isolator and changing the factors,such as the structures of the inner ring and outer ring,the material hardness of the vibration attenuation rubber and so on.Finally,the swept-frequency vibration test of the MIMU prototype with the rubber isolator was completed.The experimental results are consistent with the expected design results.The experiment results show that the structure can reduce the influence of external and internal vibration interference,and make the stiffness of the damping system equal in three directions.The research provides an effective method for the structure design of MIMU rubber isolators.

关 键 词：微惯性测量单元(MIMU) 有限元仿真 橡胶减振器 隔振 三向等刚度 

分 类 号：TH703[机械工程—仪器科学与技术]