摘要
对有大惯量运动部件的三轴稳定卫星在稳态运行期间高精度高稳定度控制方法进行了研究。提出了一种卫星姿态高精度动态补偿控制算法:先基于卫星姿态动力学模型与卫星有效载荷运动部件摆动规律,设计了姿态稳定反馈控制律和补偿摆动部件干扰力矩的前馈控制器,用前馈-反馈控制的复合控制算法,消除运动部件摆动对卫星姿态控制系统产生干扰力矩的负面影响;再用干扰观测器修正因通信延迟造成的补偿残余力矩,设计了扰动观测器对前馈补偿残余力矩进行辨识,进一步补偿修正残余力矩,以保证控制系统的性能指标。仿真结果表明:该法能有效补偿干扰力矩并提高控制精度,实现的卫星姿态控制精度优于0.005°,姿态稳定度优于5×10-5(°)/s。
The high precision and high stability attitude compound control for a three-axis stabilization satellite with large inertial moving parts was investigated in this paper.A high precision attitude control algorithm of satellite was put forward.First,based on the dynamic model of satellite attitude and movement law of moving parts of satellite payload,the attitude stabilization control and a feed-forward controller to compensate the disturbance torque of the moving parts were designed.The negative effects on the satellite attitude control system due to the movement of the moving parts were eliminated by using feedforward-feedback compound control law.Second,the disturbance observer was applied to amend the compensatory residual torque caused by communication delay.The feed-forward compensatory residual torque was identified by the disturbance observer,which was used to amend the residual torque further to guarantee the performance of the control system.The simulation result is showed that the satellite attitude control accuracy is superior to 0.005°and the attitude stabilization is better than 5×10^(-5)(°)/s.
出处
《上海航天》
2016年第6期53-60,共8页
Aerospace Shanghai
基金
上海市扬帆计划资助(15YF1405200)
关键词
卫星姿态
大惯量运动部件
高精度控制
前馈-反馈控制
干扰观测器
复合控制
通信延迟
残余力矩
Satellite attitude
Moving parts with large inertia
High precise control
Feed-forward control
Disturbance observer
Compound control
Telecommunication delay
Residual torque
