摘要
对受未知干扰的低轨卫星编队构型保持进行了研究。由完整的非线性星间相对运动动力学方程给出用于控制器设计和稳定性分析的跟踪期望编队构型的误差方程,基于Lyapunov稳定性分析推导了干扰估计律,综合干扰估计律、反馈线性化和最优线性二次型控制器设计了自适应控制器,并证明了该自适应控制方法可保证对期望构型跟踪误差的全局渐近收敛。仿真结果表明:该自适应控制器可实现精确的构型保持,同时完成对未知干扰的估计。
The autonomous configuration keeping of the LEO formations subjected to unknown disturbances was studied in this paper. The position and velocity tracking error dynamics for controller design and stability analysis was given out based on the full nonlinear relative dynamics of the follower with respect to the leader. The disturbance estimation law was derived based on Lyapunov stability analysis. The adaptive controller was accomplished by combining the disturbance estimation law, the feedback linearization and the optimal LQR controller and ensures the global asymptotic convergence of the tracking errors. That asymptotic convergence to the expected configuration tracking error could be realized by this controller was proved in theory. The simulation results showed that the controller proposed in th/s paper could realize precise configuration keeping and disturbance estimation.
出处
《上海航天》
2013年第1期30-35,共6页
Aerospace Shanghai
关键词
编队飞行
构型保持
干扰估计
自适应控制
稳定性分析
Formation flying
Configuration keeping
Disturbance estimation
Adaptive control
Stability analysis
