一种带精确补偿的卫星姿态快速机动控制方法

针对挠性卫星姿态敏捷机动中，挠性模态和星体转动惯量不确知，进而影响前馈补偿的有效性的问题，提出一种将非线性状态观测器和转动惯量辨识相结合的精确补偿控制方法。证明了一般挠性卫星动力学的非线性项满足Lipschtiz条件，可引入非线性观测器，实现了挠性模态的准确估计。设计了一种基于角速度最优阶拟合的转动惯量校正方法，进一步提高前馈补偿的精度和姿态机动的快速性。数学仿真对比结果表明：本文所提的精确补偿控制方法，能够有效减少挠性附件振动和转动惯量不准确对姿态控制的影响，提高姿态控制的响应速度，满足挠性卫星机动过程的快速性和稳定性，适用于挠性卫星的姿态敏捷机动控制。

Satellite Attitude Fast Maneuver Control Method with Accurate Compensation

Aiming at improving the attitude control precision and stability for the flexible spacecraft, an accurate compensation method combining the nonlinear observation with inertia identification is proposed in the paper to improve the attitude control performance. The nonlinear full state observer is designed to estimate the modal of the flexible structures in order to compensate the disturbance torque caused by the flexible vibration. The Lipschtiz convergence condition for the nonlinear full state observer is proved. The inertia identification method based on the spacecraft angular rate polynomial fitting is designed to achieve better attitude maneuver performance. The numerical simulation comparison results illustrate that the proposed method can reduce the attitude maneuver time affected by the flexible vibration and inertia moment inaccurate. This method is correct and effective for the flexible spacecraft attitude maneuver.