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Observer based actuator fault tolerant control for nonlinear Takagi-Sugeno systems : an LMI approach

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4 Author(s)
Dalil Ichalal ; Centre de Recherche en Automatique de Nancy (CRAN), Nancy-Université, 2, avenue de la forêt de Haye 54516 Vandoeuvre-les-Nancy, France ; Benoît Marx ; José Ragot ; Didier Maquin

A new actuator fault tolerant control strategy is proposed for nonlinear Takagi-Sugeno (T-S) systems. The control law aims to compensate the actuator faults and allows the system states to track a reference corresponding to a fault free situation. The design of such a control law requires the knowledge of the faults, this task is achieved with a proportional integral observer (PIO). The robust stability of the system with the fault tolerant control law is analyzed with the Lyapunov theory and the ℒ2 optimization. Sufficient stability conditions are obtained in terms of linear matrix inequalities (LMIs). The gains of the FTC are obtained by solving these LMIs. A simulation example is finally proposed.

Published in:

Control & Automation (MED), 2010 18th Mediterranean Conference on

Date of Conference:

23-25 June 2010