星载飞轮双状态隔离用变刚度摩擦阻尼器  

Variable stiffness friction damper for dual-state isolation of flywheel on satellite

作　　者：刘国勇[1] 侯永涛 刘海平 赵鹏鹏 朱冬梅[1] LIU Guo-yong;HOU Yong-tao;LIU Hai-ping;ZHAO Peng-peng;ZHU Dong-mei(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China;No.208 Research Institute of China Ordnance Industries,Beijing 102202,China)

机构地区：[1]北京科技大学机械工程学院,北京100083 [2]中国兵器工业第二○八研究所,北京102202

出　　处：《光学精密工程》2020年第7期1539-1545,共7页Optics and Precision Engineering

基　　金：国家自然科学基金资助项目(No.51405014);国家留学基金委资助项目(No.201806465019)。

摘　　要：为了有效抑制星载飞轮在轨姿态调整过程中输出的微振动,并改善发射过程中的动力学环境,提出一种变刚度摩擦阻尼器。根据星载飞轮在轨工作阶段和主动发射阶段的实际载荷条件,采用谐波平衡法得到频域力/绝对位移传递率曲线,并通过实验方法对所得传递率曲线进行了验证。实验结果表明变刚度摩擦阻尼器在谐振频率处能够提供较大阻尼,将放大系数控制在较小范围内,实测结果和理论解吻合较好。研究结果表明在轨工作阶段小载荷作用下,变刚度摩擦阻尼器能有效抑制飞轮输出微振动,在保证高频段隔振性能的同时,力传递率峰值约为6.5;在主动发射阶段大载荷作用下,绝对位移传递率峰值约为2.3。由此可见,变刚度摩擦阻尼器能同时兼顾飞轮在不同工作阶段载荷条件变化的影响,显著抑制其动态响应。In this study,a variable stiffness friction damper was proposed that effectively suppresses micro-vibration output during the orbit attitude adjustment of the spaceborne flywheel and improves dynamic environment during launch.Depending on the actual load conditions of the spaceborne flywheel in orbit and active launching phases,the harmonic balance method was used to obtain the frequency domain force/absolute displacement transmissibility curve.The transmissibility curve was verified via experimental methods.The experimental results show that the variable stiffness friction damper can provide greater damping at the resonance frequency and control the amplification factor to a smaller range.The measured results agree well with the theoretical solution.The research results show that under the effect of small load on-orbit phase,the variable stiffness friction damper can effectively suppress the micro-vibration of the flywheel output.On ensuring high frequency vibration isolation performance,the peak value of the force transmissibility is approximately 6.5.Under heavy load during the launching phase,the peak value of the absolute displacement transmissibility is approximately 2.3.Notably,the variable stiffness friction damper can simultaneously consider the influence of the change of the flywheel load conditions in different working phases,and significantly inhibit its dynamic response.

关 键 词：变刚度 摩擦阻尼器 微振动 主动发射阶段 在轨工作阶段 

分 类 号：O322[理学—一般力学与力学基础] TH113.1[理学—力学]