%0 Journal Article
%T 考虑输入饱和的近空间飞行器姿态容错控制<br>Fault-tolerant attitude control for near space vehicles with input saturation
%A 杨青运
%A 陈谋
%J 控制理论与应用
%D 2016
%R 10.7641/CTA.2016.60177
%X 针对近空间飞行器姿态控制中出现的执行器故障, 输入饱和与外部干扰等问题, 设计了一种基于二阶滑模 干扰观测器和辅助系统的鲁棒容错跟踪控制方法. 首先, 将系统不确定, 外部扰动和执行器故障作为复合干扰, 设 计super-twisting二阶滑模干扰观测器对其进行估计. 然后为解决输入饱和问题构造了辅助分析系统, 并借助 backstepping方法, 设计姿态容错跟踪控制器. 利用Lyapunov方法, 严格证明了所有闭环系统信号的收敛性. 最后将 所设计的控制方法应用于近空间飞行器姿态控制中, 仿真结果验证了该控制方法的有效性.<br>In this paper, a robust fault-tolerant attitude control scheme is investigated for the near space vehicles (NSVs) with actuator faults, input saturation and unknown external disturbances. Firstly, a super-twisting second order sliding mode disturbance observer is developed to estimate the unknown compound disturbances including system uncertainties, external disturbances and actuator faults. Then, based on the backstepping technology and an auxiliary system constructed to solve the input saturation problem, a attitude fault-tolerant controller is proposed. In addition, the convergence of all the closed-loop system signals under the designed controller is rigorously proved using Lyapunov method. Finally, the proposed control scheme is applied to the attitude control of the NSV, and the effectiveness of this proposed control scheme is demonstrated by the simulation results.
%K 近空间飞行器 干扰观测器 输入饱和 容错控制&lt
%K br&gt
%K near space vehicles disturbance observer input saturation fault-tolerant control
%U http://jcta.alljournals.ac.cn/cta_cn/ch/reader/view_abstract.aspx?file_no=CCTA160177&flag=1