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给出了一种可重复使用航天器再入飞行鲁棒控制方法。在给定可用制导指令和干扰、不确定性的上界条件下,综合利用快慢双回路连续滑模控制方法,生成包括气动舵面和反推力控制系统(RCS)发动机的控制指令,得到了在建模误差和外界干扰存在的情况下拥有高精度、鲁棒性和解耦特性的气动角和姿态角速率跟踪结果。滑模控制抖振抑制逻辑利用李亚普诺夫方法,构筑滑模干扰观测器,并依据自适应增益调节思想,有效消除了控制抖振,保证了工程实际应用的能力。以某型可重复使用航天器为例,在考虑到模型不确定性、风扰以及测量噪声的情况下,通过不同的控制律设计结果对比表明,该方法高效、可靠。
A robust control method of reusable spacecraft reentry flight is given. Given the available guidance commands and disturbances and uncertainties, the control instructions of the aerodynamic rudder and anti-thrust control system (RCS) engine are generated by comprehensively using the double-loop continuous sliding mode control method, Aerodynamic angle and attitude angular velocity tracking results with high accuracy, robustness and decoupling characteristics in the presence of modeling errors and external disturbances. Sliding mode control chattering suppression logic using Lyapunov method to construct a sliding mode interference observer, and based on the idea of adaptive gain adjustment, effectively eliminating the control of chattering, to ensure the practical application of the project. Taking a type of reusable spacecraft as an example, the comparison of design results of different control laws shows that the proposed method is efficient and reliable considering the model uncertainty, wind disturbance and measurement noise.