title: Adaptive sensor-fault tolerant control for a class of multivariable uncertain nonlinear systems.
abstract: This paper deals with the active fault tolerant control (AFTC) problem for a class of multiple-input multiple-output (MIMO) uncertain nonlinear systems subject to sensor faults and external disturbances. The proposed AFTC method can tolerate three additive (bias, drift and loss of accuracy) and one multiplicative (loss of effectiveness) sensor faults. By employing backstepping technique, a novel adaptive backstepping-based AFTC scheme is developed using the fact that sensor faults and system uncertainties (including external disturbances and unexpected nonlinear functions caused by sensor faults) can be on-line estimated and compensated via robust adaptive schemes. The stability analysis of the closed-loop system is rigorously proven using a Lyapunov approach. The effectiveness of the proposed controller is illustrated by two simulation examples.
authors.affiliation: LCP, Department of Automatic Control, National Polytechnic School (ENP), 10, Av. Hassen Badi, BP. 182, Algiers, Algeria. Electronic address: khebbachehicham@yahoo.fr.
authors.forename: Hicham
authors.initials: H
authors.lastname: Khebbache
authors.affiliation: LCP, Department of Automatic Control, National Polytechnic School (ENP), 10, Av. Hassen Badi, BP. 182, Algiers, Algeria. Electronic address: tadjine@yahoo.fr.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Tadjine
authors.affiliation: LAJ, Faculty of Science and Technology, University of Jijel, BP. 98 Ouled Aissa, 18000 Jijel, Algeria. Electronic address: labiod_salim@yahoo.fr.
authors.forename: Salim
authors.initials: S
authors.lastname: Labiod
authors.affiliation: LAJ, Faculty of Science and Technology, University of Jijel, BP. 98 Ouled Aissa, 18000 Jijel, Algeria. Electronic address: boulkroune2002@yahoo.fr.
authors.forename: Abdesselem
authors.initials: A
authors.lastname: Boulkroune
keywords: Adaptive control; Backstepping approach; Fault tolerant control; MIMO uncertain nonlinear systems; Sensor faults