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Nouvelle méthodologie de synthèse de lois de commande tolérante aux fautes garantissant la fiabilité des systèmes

Abstract : The works developed in this thesis deal with the active fault tolerant control design incorporating actuators reliability. This new methodology requires the adaptation of the reliability analysis tools with the system control field. The explicit integration of load in the actuators reliability models is considered. First, the reconfigurability analysis of fault tolerant control systems is treated. A reliable reconfigurability analysis based on the energy consumption with respect to overall system reliability is presented. A reconfigurability index which defines the functional limitation of the system is proposed based on fault severity and actuators reliability degradation. The second part of the developed works is devoted to control allocation and re-allocation. Two approaches of control re-allocation are proposed by taking into consideration actuator degradation health. The control inputs are applied to the system with respect to actuators reliability and faults. The third part contributes to a fault tolerant controller design incorporating actuator criticality. A sensitivity analysis of the overall system reliability and criticality indicator are proposed. A new method of active fault tolerant control is developed with Linear Matrix Inequality (LMI) formulation based on actuator criticality.
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https://tel.archives-ouvertes.fr/tel-01746195
Contributor : Ahmed Khelassi <>
Submitted on : Friday, September 2, 2011 - 2:38:21 PM
Last modification on : Friday, October 23, 2020 - 8:38:03 AM
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Ahmed Khelassi. Nouvelle méthodologie de synthèse de lois de commande tolérante aux fautes garantissant la fiabilité des systèmes. Automatique / Robotique. Université Henri Poincaré - Nancy 1, 2011. Français. ⟨NNT : 2011NAN10041⟩. ⟨tel-01746195v2⟩

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