航天器姿态大角度机动的分散保性能控制

Decentralized guaranteed cost control for large angle attitude maneuver of spacecraft

针对航天器大角度姿态机动控制问题,考虑存在外部干扰及模型参数不确定的影响,提出一种分散保性能控制策略。首先,对航天器姿态系统进行建模,并对模型的性质进行描述;其次,利用反馈线性化方法将航天器非线性模型变换成3个独立方程进行分散控制器的综合;最后,设计分散保性能鲁棒控制器,补偿航天器模型中参数不确定性,对外部干扰进行抑制。设计控制器时引入保性能控制律可以使系统在抑制外部干扰及补偿参数不确定性的同时,满足系统性能指标的要求,并给出了所研究闭环系统稳定性的严格证明,仿真结果表明所设计的控制器可行、有效。

A decentralized guaranteed robust control law is proposed for spacecraft attitude large-angle attitude maneuvering in the presence of moment of inertia uncertainty and external perturbation. Firstly,modeled the spacecraft with uncertain parameter and described its properties. Next,the spacecraft attitude dynamic model was transformed into three parts to integrate decentralized controller by using feedback linearization method. Then,guaranteed cost control method was added to suppress external environment disturbance,complement uncertainty of inertial moment and meet the requirement of the performance index. Stability of close-loop system is strictly proved,and the simulation results were given.