中国空间科学技术 ›› 2020, Vol. 40 ›› Issue (5): 26-33.doi: 10.16708/j.cnki.1000-758X.2020.0055

• 高分七号专栏 • 上一篇    下一篇

星载运动附件扰动抑制方法研究

陆栋宁,郭超勇,王淑一,陈超   

  1. 1.北京控制工程研究所,北京100094
    2.空间智能控制技术重点实验室,北京100094
  • 出版日期:2020-10-25 发布日期:2020-09-30

A disturbance mitigation method for moving appendages on spacecraft

LU Dongning, GUO Chaoyong, WANG Shuyi, CHEN Chao   

  1. 1.Beijing Institute of Control Engineering, Beijing100094, China
    2.Science and Technology on Space Intelligent Control Laboratory, Beijing100094, China
  • Online:2020-10-25 Published:2020-09-30
  • Supported by:
    智能制造专项行动计划(JCKY2018203A001)

摘要: 为改善高分七号卫星(GF-7)在附件(特别是双轴定向天线)运动时的姿态稳定度,研究了星载附件指向运动平滑及其扰动抑制方法。首先,针对卫星姿态扰动主要来源于对地数传天线对地面通信目标的快速捕获运动的情况,通过引入具有角速度全局光滑性的路径平滑技术对天线的目标捕获过程进行规划;其次,针对含有双轴运动天线的整星姿态运动,建立了适用于任意星体运动速度下的一般动力学方程,并进行了对比验证。进而根据规划后的天线运动引起的扰动力矩对姿态控制系统引入前馈补偿,从而抑制天线运动对整星姿态的扰动影响。基于提出的扰动抑制方法进行数值仿真,结果表明,运动平滑与力矩补偿结合的协同控制技术可将天线扰动削减90%以上。

关键词: 高分七号卫星, 天线驱动机构, 全频段扰动抑制, 协同控制, 运动平滑, 力矩补偿

Abstract: To improve the attitude stability of the GF-7 spacecraft under disturbances from moving appendages,especially those induced by dualaxis directional antennae, a motion smoothing method was proposed and the corresponding disturbance mitigation technique was investigated. Firstly, as the attitude disturbances were usually caused by the data transmission antennae′s rapid capturing of ground targets for communications, a motion planning method with global smooth angular velocity was presented. Secondly, the general attitude dynamic equations of spacecraft with dualaxis antennae, which held true under any angular velocities, were developed and verified by comparison simulations. Then, feedforward compensation was developed and applied in the attitude control loop for reducing the disturbances from the antennae. Simulation results show that the proposed methods mitigate the disturbances of moving appendages by 90% while the antenna was working.

Key words: GF-7, antenna drive assembly, all-frequencies-disturbance mitigation, coordinate control, motion smoothing, torque compensation