论文部分内容阅读
研究了具有模型参数不确定和受空间环境干扰影响的挠性航天器姿态大角度快速机动快速稳定控制问题,设计了一种受细胞膜放电模型启发的鲁棒姿态控制器。综合考虑挠性航天器的强非线性和强耦合特性,设计了对模型参数和环境干扰具有鲁棒性的姿态机动控制器。为了减小机动中姿态突变激发的挠性附件振动,基于细胞膜放电的动力学模型设计了一种改进的鲁棒控制器。当参数不确定范围和干扰有界时,所提鲁棒控制器可使闭环系统的解最终一致有界。最后,分析了控制器参数对姿态控制性能及所需能量的影响。数值仿真验证了所提鲁棒控制器用于姿态机动控制可以得到良好的效果。
The problem of fast and stable large-angle maneuvering of flexible spacecraft with uncertainty of model parameters and influence of space environment is studied. A robust attitude controller inspired by cell membrane discharge model is designed. Considering the strong nonlinearity and strong coupling of the flexible spacecraft, a pose maneuver controller with robustness to model parameters and environmental disturbances is designed. In order to reduce the vibration of the flexible attachment excited by attitude change in maneuver, an improved robust controller is designed based on the dynamic model of cell membrane discharge. When the parameter uncertainty range and the disturbance are bounded, the robust controller can make the closed-loop system finally uniformly bounded. Finally, the influence of controller parameters on attitude control performance and required energy is analyzed. The numerical simulation shows that the proposed robust controller can be used in gesture maneuvering to get good results.