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Évaluation par simulation de la sûreté de fonctionnement de systèmes en contexte dynamique hybride

Abstract : The research of analytical solutions for reliability assessment in dynamic context is not solved in the general case. A state of the art presented in chapter 1 shows that partial approaches exist in the case of particular hypothesis. The Monte Carlo simulation would be the only recourse, but there were no tools allowing the simultaneous simulation of the discrete evolution of the system and its continuous evolution taking into account the probabilistic aspects. In this context, in chapter 2, we introduce the concept of hybrid stochastic automaton capable of taking into account all the problems posed by dynamic reliability and to accede to the assessment of dependability parameters by a Monte Carlo simulation implemented in Scicos-Scilab environment. In chapter 3, we show the effectiveness of our approach of simulation for dependability assessment in dynamic context through two test cases of which case one is a benchmark of dependability community. Our approach responds to the posed problems, notably the consideration of the influence of the discrete state, of the continuous state and their interaction, in the probabilistic assessment of the performances of a system in which besides, the reliability characteristics of components depend themselves of the continuous and discrete states. In chapter 4, we give an idea of the interest of control by supervision as a means of dependability. The concepts of observer automaton and of controller have been introduced and illustrated on our test case in order to show their potential
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Submitted on : Thursday, March 29, 2018 - 11:48:05 AM
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Gabriel Antonio Perez Castaneda. Évaluation par simulation de la sûreté de fonctionnement de systèmes en contexte dynamique hybride. Autre. Institut National Polytechnique de Lorraine, 2009. Français. ⟨NNT : 2009INPL016N⟩. ⟨tel-01748753⟩



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