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Contribution aux systèmes tolérants aux défauts : Synthèse de méthodes de reconfiguration et/ou de restructuration intégrant la fiabilité des composants

Abstract : The work presented in this document deals to fault tolerant control systems, more precisely the synthesis of a method of reconfiguration and/or restructuration using the reliability of the components. The reconfiguration strategy is a usual way to recover the nominal performances and preserve stability conditions. Under assumptions that there exist several structures (working mode) resulting from the disconnection of faulty subsystems, each structure imposes new operating conditions and consequently a new value of reliability and cost. The reconfiguration strategy proposed in this document tries to find from all possible structures the optimal structure that has the best control performance with the highest reliability and lowest cost. - The first proposed method treats only the static performances resulting in considering the reliability and the cost of the components. The determination of the optimal structure is based on an online estimate of the reliability and costs of the components. - A second method using the performances of the controllers is then developed. The Pseudo inverse method PIM is used for designing the controllers. Modifications of method PIM are proposed in order to ensure the stability of the system and to achieve defined dynamic performances. An index of dynamic performances is integrated in the selection criterion of the optimal structure. - The two developed methods are integrated in order to define a fault tolerant strategy. It is applied to a hydraulic and thermal system of 3 tanks.
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Theses
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http://docnum.univ-lorraine.fr/prive/SCD_T_2007_0006_GUENAB.pdf
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https://hal.univ-lorraine.fr/tel-01747003
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Submitted on : Thursday, March 29, 2018 - 10:49:20 AM
Last modification on : Saturday, October 16, 2021 - 11:14:14 AM

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  • HAL Id : tel-01747003, version 1

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Fateh Guenab. Contribution aux systèmes tolérants aux défauts : Synthèse de méthodes de reconfiguration et/ou de restructuration intégrant la fiabilité des composants. Autre. Université Henri Poincaré - Nancy 1, 2007. Français. ⟨NNT : 2007NAN10006⟩. ⟨tel-01747003⟩

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