基于模糊干扰观测器的空天飞行器轨迹线性化控制

针对一类多输人多输出非线性不确定系统，提出了基于模糊干扰观测器（FDO）的轨迹线性化控制（TLC）方法并应用于空天飞行器（ASV）飞行控制系统设计。利用模糊系统具有以任意精度逼近非线性函数的能力设计FDO对未知干扰和不确定进行估计，并通过鲁棒控制项来提高系统的性能。采用Lyapunov方法本文证明了闭环系统跟踪误差和干扰观测误差一致最终有界。最后利用所提出的控制方案设计了ASV飞行控制系统，仿真结果表明了控制方案的有效性和鲁棒性。

Trajectory Linearization Control for an Aerospace Vehicle Based on Fuzzy Disturbance Observer

This paper presented an enhanced trajectory linearization control(TLC) method based on fuzzy disturbance observer(FDO) for a class of multi-input multi-output nonlinear uncertain system,and its application to an aerospace vehicle(ASV) flight control system.Thanks to the approach ability of fuzzy systems,a FDO was used to estimate the unknown disturbances and uncertainties,and the whole system performance was enhanced by a robustifying item.Uniformly ultimately boundedness of the tracking error and the disturbance observation error of the closed-loop system were proved using Lyapunov theory.Finally,the flight control system of an ASV was designed based on the proposed method.Simulation results demonstrate the effectiveness and robustness of the approach.