摘要
空间天线姿态调整过程中产生的微振动,对航天器指向精度和稳定性影响较大,因此其微振动分析与设计已成为高精度航天器设计的重要内容。基于Ansys软件和Admas软件,建立天线结构的多柔体系统动力学分析模型,分析典型驱动条件下天线结构的扰动力和扰动力矩,通过地面微振动物理试验,验证动力学分析方法的可靠性。基于天线多柔体系统动力学分析模型,探讨驱动模式、驱动转速对天线扰动力和扰动力矩的影响。结果表明:扰动力和力矩主要幅值集中在频率f=0~50 Hz的低频段;驱动模式和驱动转速对天线结构的扰动频率无明显影响,主要影响扰动力和扰动力矩的幅值;单轴驱动模式下,驱动转速n=0.2°/s时,天线的扰动最剧烈;XY双轴同时驱动时,X轴和Y轴转动单元引起的天线扰动产生一定程度的叠加,天线结构的扰动更为剧烈,扰动力和扰动力矩变化较为复杂。研究工作可为空间天线的微振动抑振策略制定提供技术支持。
The micro-vibration generated during the attitude adjustment to a spaceborne antenna has a great effect on the pointing accuracy and stability of the spacecraft.Therefore,the analysis and design for the micro-vibration has become an important part of the high-precision spacecraft design.Based on the ANSYS software and ADAMS software,a dynamic analysis model for the flexible multi-body system of an antenna is established.The disturbance force and torque of the antenna under typical driving conditions are analyzed.The reliability of the dynamic analysis method is verified by the ground micro-vibration physical tests.Based on the dynamic analysis model of the antenna flexible multi-body system,the effects of the driving mode and rotational speed on the disturbance force and torque of the antenna are discussed.The results show that the main amplitudes of the disturbance force and torque are concentrated in the low frequency range from 0 Hz to 50 Hz,and the driving mode and rotational speed have no obvious influence on the disturbance frequency of the antenna structure but have effects on the amplitudes of the disturbance force and torque.In the single-axis driving mode,when the driving rotational speed is 0.2°/s,the disturbance of the antenna is the most severe.In the XY dual-axis driving mode,the antenna disturbance caused by the X-and Y-axis rotation units has a certain degree of superposition,the disturbance of the antenna structure is more severe,and the changes in the disturbance force and torque are more complicated.The present work can provide technical support for the formulation of micro-vibration suppression strategies for spaceborne antennas.
作者
杨可
陈薄
贾清健
古忠涛
YANG Ke;CHEN Bo;JIA Qingjian;GU Zhongtao(Key Laboratory of Testing Technology for Manufacturing Process,Ministry of Education,School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Xi’an Institute of Space Radio Technology,Xi’an 710100,Shaanxi,China)
出处
《上海航天（中英文）》
CSCD
2023年第6期1-10,共10页
Aerospace Shanghai（Chinese&English）
关键词
星载天线
微振动
驱动模式
驱动转速
扰动力
扰动力矩
spaceborne antenna
micro-vibration
driving mode
driving rotational speed
disturbance force
disturbance torque
