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Contribution à un modèle d'évaluation quantitative des performances fiabilistes de fonctions électroniques et programmables dédiées à la sécurité

Abstract : The use of fault-tolerant EP architectures has induced growing constraints, whose influence on reliability-based performance metrics is no more negligible. To face up the growing influence of simultaneous failure, this thesis proposes, for safety-related functions, a new-trend assessment method of reliability, based on a better taking into account of time-aspect. This report introduces the concept of information and uses it to interprete the failure modes of safety-related function as the direct result of the initiation and propagation of erroneous information until the actuator-level. The main idea is to distinguish the apparition and disappearance of erroneous states, which could be defined as intrinsically dependent of HW-characteristic and maintenance policies, and their possible activation, constrainted through architectural choices, leading to the failure of safety-related function. This approach is based on a low level on deterministic SED models of the architecture and use non homogeneous Markov chains to depit the time-evolution of probabilities of errors.
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Submitted on : Tuesday, January 23, 2007 - 2:44:26 PM
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Karim Hamidi. Contribution à un modèle d'évaluation quantitative des performances fiabilistes de fonctions électroniques et programmables dédiées à la sécurité. Automatique / Robotique. Institut National Polytechnique de Lorraine - INPL, 2005. Français. ⟨tel-00126046⟩

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