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22 EQUIPMENT ENVIRONMENTAL ENGINEERING 2015年6月
惯性测量组合减振系统动力学分析及实验研究
郑玲,房占鹏
(重庆大学机械传动国家重点实验室,重庆 400030)
摘要:目的保证惯性测量组合(Inertial Measuring Unit,IMU)减振系统具有良好的减振性能。方
法建立测量组合的三维模型,为提高 IMU 的解耦率,调整 IMU 和支架的质心,使 IMU 的质心与 4
个隔振器的刚度中心基本重合。采用Mooney-Rivlin超弹性本构模型对橡胶隔振器的橡胶材料进
行表征,并在此基础上建立 IMU 减振系统有限元模型,对 IMU 减振系统的频率响应和冲击响应进
行分析,并对 IMU 减振系统进行振动和冲击试验。结果通过调整 IMU 质心位置和支架结构,使
各阶模态能量解耦率都在 80%以上;通过频率响应仿真分析,IMU 减振系统在 X,Y,Z 方向上放大
倍数分别为 ,,;通过冲击响应仿真分析,IMU 减振系统响应最大幅值为 。结论
通过实验验证了有限元模型的正确性和减振设计的有效性。
关键词:惯性测量组合;有限元模型;动态特性;冲击响应
DOI:-
中图分类号:TJ02 文献标识码:A
文章编号:1672-9242(2015)03-0022-07
Dynamics Analysis and Experimental Study of Vibration
System in Inertial Measuring Unit
ZHENG Ling,FANG Zhan-peng
(State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400030,China)
ABSTRACT:Objective To study the dynamic characteristics of vibration system in Inertial Measuring Unit (Inertial
Measuring Unit,IMU) , so as to guarantee the good vibration damping performance of IMU vibration system.
Methods The 3D model of the IMU was established and its centroid position and support were adjusted to make it
almost coincide with the stiffness center of four vibration isolators,and to improve the decoupling rate of the vibration
system. The Mooney-Rivlin hyperelastic constitutive model was used to characterize the rubber material of the rubber
isolator and on that basis, and the finite element model of the IUM vibration system was built. The frequency response
analysis and shock response analysis were carried out on the model. The vibration and shock experiments of the IMU
vibration system were also presented. Results By adjusting the centroid position of IMU and the supporter framework,
收稿日期:2015-03-16;修订日期:2015-04-19
Received:2015-03-16;Revised:2015-04-19
基金项目:国家自然科学基金(50775225)
Fund:Supported by the National Natural Science Foundation of China(50775225)
作者简介:郑玲(19