一种全金属六自由度隔振平台的研究  

Research on an All-metal Vibration Isolation Platform with Six DOFs

作　　者：杜永刚[1] 王雪松[1] 王禺林 DU Yonggang;WANG Xuesong;WANG Yuling(Lanzhou Institute of Physics,CAST,Lanzhou 730000)

机构地区：[1]中国空间技术研究院兰州空间技术物理研究所,兰州730000

出　　处：《机械工程学报》2023年第1期188-198,共11页Journal of Mechanical Engineering

基　　金：国防装备预先研究资助项目(YSC1402)。

摘　　要：某航空器的高精度测量器件对振动非常敏感,其隔振系统可在高真空、极端温度环境下实现多自由度的隔振。文中提出了一种全金属六自由度隔振平台,该平台利用一种筏式金属橡胶阻尼器作为Steward机构的滑动副,实现了全金属的六自由度隔振性能。研究者采用动态增量非线性分析系统计算了这种隔振系统的随机振动响应特性,仿真结果验证了其原理的正确性。研发了原型机并测试了其性能指标,测试结果表明:在40~2000 Hz的宽频域内,该原型机能够有效衰减X、Y、Z三轴向的随机振动能量,各轴向随机振动的总均方根加速度由2.2 g衰减到1 g以下,该原型机也可衰减三个轴向的角振动能量。研究成果可解决目前多自由度隔振系统对极端环境适应性差的技术难题,成果可直接应用于特殊环境下的隔振技术领域。A high-precision device in modern aviation is vibration sensitive,and its vibration isolation system has to realize multi-DOF vibration isolation in high vacuum and extreme temperature environments.Researchers propose an all-metal vibration isolation platform with six DOF in this paper.This platform uses a raft MRD as the parallel pair of the steward mechanism to realize the performance of six DOF vibration isolation in all metal.Researchers use the ADINA system to calculate the response characteristics of the vibration isolation system excited by random vibration,and the simulation results of the model prove the correctness of its principle.The researchers built a prototype and tested its performance.The test results show that the prototype can effectively attenuate the energy of random vibration in the three axes of X,Y,and Z when it is in the wide frequency range of 40-2000Hz,and the total root-mean-square value of random vibration in each axis goes down from 2.2 g to less than 1 g.In addition,the prototype can also attenuate the energy of angular vibration in three axes.The research results can effectively solve the technical problem of poor adaptability of multi-DOF vibration isolation in extreme environments,and the results can be applied directly to vibration isolation technology in specific environments.

关 键 词：隔振 六自由度 全金属 随机振动 

分 类 号：V241[航空宇航科学与技术—飞行器设计]