大口径快摆镜鲁棒控制器设计

Robust Controller Design for Large-Aperture Fast Steering Mirror System

为了满足深空天文观测的高质量成像,对空间望远镜的系统稳像精度提出了很高的要求。大口径快摆镜(LAFSM)的控制是实现天文观测中精密稳像系统的关键,其性能决定了空间望远镜的视轴稳定精度。采用内模控制与H_∞结合的方式,设计了复合精密稳像控制系统,并对其控制性能进行了分析。仿真结果表明,控制器具有较强的稳定性和鲁棒性。

To guarantee high image quality of astronomical observation, high-precision stabilization system is needed for space telescope. The control of Large-Aperture Fast Steering Mirror （LAFSM） is the key for realizing precise image stabilization, whose performance determines the boresight stabilization accuracy of the space telescope. Both Internal Model Control （IMC） and H∞ are employed to design a compound control system, and an analysis is made to its controlling performance. The simulation results show that the controller has strong stability and robustness.