多维微振动模拟器的设计及测试  

DESIGN AND TEST OF A MULTI-DIMENSIONAL MICRO-VIBRATION SIMULATOR

作　　者：王兵[1,2] 徐振邦 杨剑锋[1,2] 王晓明[1,2] 吴清文 WANG Bing;XU ZhenBang;YANG JianFeng;WANG XiaoMing;WU QingWen(Innovation Lab of Space Robot System,Changchun Institute of Optics,Fine Mechanics and Physics,Chiese Academy of Sciences,Changchun 130033,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所空间机器人系统创新研究室,长春130033 [2]中国科学院大学,北京100049

出　　处：《机械强度》2018年第4期770-777,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(11302222);中国科学院长春光学精密机械与物理研究所创新基金(Y4CX1SS141)资助~~

摘　　要：为模拟卫星、空间站等空间平台的微振动,设计了一种基于Gough-Stewart构型的多维微振动模拟器。首先,介绍了多微振动模拟器的结构设计,并利用牛顿-欧拉法对模拟器进行建模,该模型考虑了负载和上平台的质心与随体坐标原点不重合的情况,结合虚功原理推导出固有频率及其主振型的数学解析式。然后,分别使用有限元法及解析法对微振动模拟器进行了模态分析,得到模拟器的前六阶固有频率,其理论分析值与仿真结果之间的最大误差为4.17%。最后,研制出一套微振动模拟器的原理样机,并对其结构特性进行了测试。实验结果表明:该模拟器的有效工作频率可达100 Hz,能够满足微振动实验需求。To simulate the micro-vibration of the space platform such as satellites,space stations and so on,a multidimensional micro-vibration simulator based on the Gough-Stewart configuration was designed.Firstly,the structural design of the multi-dimensional micro-vibration simulator was introduced.The theoretical model of the simulator is established by NewtonEuler’s method.In this model,the situation of misalignment between the origin of the relative reference frame and the barycenter of upper platform and load was considered.Combining with the principle of virtual work,the equations of the natural frequencies and mode shapes could be gained.Secondly,the modal of the simulator was analyzed by the finite element method and the analytical method.The first six natural frequencies and the modal shapes were obtained.The maximum error of FEA simulation is4.17% compared with the mathematical analytical solution.Finally,a prototype of the micro-vibration simulator was manufactured and its performance was testing.The test results indicate that the effective operating frequency of the simulator is up to 100 Hz,meeting the need of the vibration test.

关 键 词：空间光学载荷 微振动 Gough-Stewart构型 模态测试 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3