Title :
Fault-tolerant control for flight systems in the presence of severe actuator failures and input constraints
Author :
Wang Man ; Yang Jianying ; Yan Yingxin ; Jiang Zhichao
Author_Institution :
Dept. of Mech. & Aerosp. Eng., Peking Univ., Beijing, China
Abstract :
A novel fault-tolerant control scheme is proposed in this paper, in which model reference adaptive control (MRAC) strategy is incorporated with control allocation (CA) method to cope with severe actuator failures, under the assumption that actuator redundancy is no longer available in the fault system. The CA method can redistribute the control signal to the remaining actuators based on the fault information. Besides achieving CA, MRAC can guarantee the closed-loop stability of the system, reduce performance deterioration caused by the severe failure, and track the modified reference model well. The modified reference model is utilized to compensate for the input saturation error. Simulations of a satellite launch vehicle model are given to illustrate the effectiveness of the proposed scheme.
Keywords :
actuators; aerospace control; artificial satellites; closed loop systems; fault tolerance; model reference adaptive control systems; signal processing; stability; CA method; MRAC strategy; actuator failures; closed-loop stability; control allocation method; control signal; fault-tolerant control scheme; flight systems; input constraints; input saturation error; model reference adaptive control strategy; modified reference model tracking; performance deterioration reduction; satellite launch vehicle model; Actuators; Adaptation models; Fault tolerant systems; Redundancy; Resource management; Stability analysis; Fault-tolerant control; adaptive control; control allocation; flight system;
Conference_Titel :
Control Conference (CCC), 2013 32nd Chinese
Conference_Location :
Xi´an
