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Contribution aux systèmes tolérants aux défauts : Synthèse
d'une méthode 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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https://tel.archives-ouvertes.fr/tel-00164822
Contributor : Didier Theilliol <>
Submitted on : Monday, July 23, 2007 - 9:15:15 PM
Last modification on : Friday, October 23, 2020 - 8:38:04 AM
Long-term archiving on: : Thursday, April 8, 2010 - 11:51:27 PM

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Fateh Guenab. Contribution aux systèmes tolérants aux défauts : Synthèse
d'une méthode de reconfiguration et/ou de restructuration
intégrant la fiabilité des composants. Automatique / Robotique. Université Henri Poincaré - Nancy I, 2007. Français. ⟨tel-00164822⟩

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