Fault-tolerant attitude control for near space vehicles with input saturation
YANG Qing-yun
CHEN Mou
WU Qing-xian
Abstract：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.
Keywords：near space vehiclesdisturbance observerinput saturationfault-tolerant control
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 1449-1456 )