基于模糊前馈的空天飞行器再入姿态的模糊鲁棒跟踪控制

Fuzzy Robust Tracking Control for Aerospace Vehicle's Reentry Attitude Based on Fuzzy Feedforward

提出一种新的模糊鲁棒跟踪控制方法,并应用于研究空天飞行器(ASV)再入段姿态角的跟踪问题。基于ASV再入段存在外界干扰的不确定姿态动态系统的T-S模糊模型,考查姿态角跟踪误差,引入模糊前馈,得出跟踪误差指数稳定的约束条件,并在镇定控制是前馈控制的先决条件的前提下,研究了模糊前馈跟踪控制器和具有η衰减率的模糊镇定控制器的设计问题,基于Matlab的LMI(linear matrix inequalities)和FLC(fuzzy logic control)工具可实现此问题的求解。仿真结果验证了算法的有效性。

This paper proposes a new design method for fuzzy robust tracking control,which is used for aerospace vehicle's(ASV) attitude angles tracking problem during the phase of reentry.The T-S fuzzy model based uncertain reentry attitude dynamic systems with external disturbance is considered,based on which,the tracking errors of the attitude angles are studied and the constraints of the tracking errors' exponential stability are obtained by using fuzzy feedforward.Under the condition of stabilization control bein...