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针对航天器姿态控制过程中同时存在执行器故障、安装偏差与控制受限的多约束问题,提出一种基于积分滑模面的自适应鲁棒姿态容错控制方法,所设计的控制器在满足执行器控制能力的饱和受限约束的条件下确保系统稳定;同时,通过引入控制参数在线自适应学习策略以提高对干扰、安装偏差以及故障变化的鲁棒性,进而减小对这些信息的依赖能力,并基于Lyapunov方法分析了系统稳定性.通过数值仿真结果表明,提出的自适应积分滑模容错控制算法能有效的保证执行器故障时航天器姿态控制系统的稳定性,并具有较强的鲁棒性.
Aiming at the problem of multi-constraint with simultaneous actuator failure, installation deviation and limited control in spacecraft attitude control, an adaptive robust attitude fault tolerant control method based on integral sliding mode surface is proposed. The control of the system is limited under the conditions of saturation constraints to ensure system stability; the same time, through the introduction of control parameters online adaptive learning strategy to improve the interference, installation deviations and changes in the robustness of the failure, thereby reducing the dependence on these information , And the stability of the system is analyzed based on Lyapunov method.The numerical simulation results show that the proposed adaptive integral sliding mode fault tolerant control algorithm can effectively guarantee the stability of the spacecraft attitude control system when the actuator fails and has a strong Lu Great.