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研究了非零初始整星角动量下两飞轮驱动航天器姿态机动控制问题,针对在两飞轮旋转轴平面外某一视线轴的指向控制,给出了目标姿态生成算法和一种抗输入饱和的视线轴指向滑模控制算法。首先,通过对两飞轮驱动航天器静止时的可行姿态进行分析,给出了视线轴指向目标方向的必要条件。然后,基于该条件得到了使视线轴与目标方向偏差最小的目标姿态。最后,对状态方程进行降维和线性化处理,设计了一种抗输入饱和的视线轴指向滑模控制算法。仿真结果展示了本文算法的可行性和有效性。
The attitude maneuver control of two flywheel-driven spacecraft with non-zero initial full-angular momentum is studied. The target attitude generation algorithm and a method of anti-input saturation Line - of - sight Sliding Mode Control Algorithm. First of all, by analyzing the feasible attitude of two spacecraft-driven spacecraft at rest, the necessary conditions for the line of sight to point to the target direction are given. Then, based on this condition, a target attitude that minimizes the deviation between the line of sight axis and the target direction is obtained. Finally, the state equation is dimensionally reduced and linearized, and a line-of-sight sliding mode control algorithm is designed to resist input saturation. The simulation results show the feasibility and effectiveness of the proposed algorithm.