小卫星大角度姿态机动的变结构控制方法

Uariable structure control of small satellite for large angle maneuver

大角度姿态机动是高分辨率遥感小卫星的关键技术之一 .在反作用轮速率饱和限制条件下 ,为获得较短的机动时间 ,在极大值原理和变结构控制理论的基础上 ,提出分步优化的方法 ,设计了次最优控制器 ,避免了直接优化控制存在的困难 .仿真结果表明 :控制算法能在反作用轮速率饱和限制条件下较快地实现姿态大角度机动 ,具有设计简单、易于实现和鲁棒性好等特点 .

Large angle maneuver in one of the critical techniques for high resolution telemetry small satellites. Reaction wheels are usually used as the executor of attitude maneuver for stabilizing satellite attitude, a step by step optimization based on the maximum theory and the variable structure control theory is suggested to make the maneuver time shorter with in the limit of reaction wheel's rate saturated. An approximate optimal controller is designed to overcome the difficulty of direct optimization. The simulation results indicate that the control algorithm has an excellent robustness and can be easily designed and realized.