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Contribution à l'évaluation de la sûreté de fonctionnement des Systèmes Instrumentés de Sécurité à Intelligence Distribuée

Abstract : The incorporation of intelligent instruments in safety loops leads towards the concept of intelligent safety and the systems become Intelligent Distributed Safety Instrumented Systems (IDSIS). The justification for using these instruments in safety applications is not fully proven and the dependability evaluation of such systems is a difficult task. Achieved work in this thesis deals with modelling and thus the performance evaluation relating to the dependability for structures which have intelligence in the instruments constituting the Safety Instrumented Systems (SIS). In the modelling of the system, the functional and dysfunctional aspects coexist and the dynamic approach using the Stochastic Activity Network (SAN) is proposed to overcome the difficulties mentioned above. The introduction of performance indicators highlight the effect of the integration of intelligence levels in safety applications. Monte-Carlo method is used to assess the dependability parameters in compliance with safety standards related to SIS (IEC 61508 & IEC 61511). We have proposed a method and associated tools to approach this evaluation by simulation and thus provide assistance in designing Safety Instrumented Systems (SIS) integrating some features of intelligent tools
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https://hal.univ-lorraine.fr/tel-01748701
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Abdelhak Mkhida. Contribution à l'évaluation de la sûreté de fonctionnement des Systèmes Instrumentés de Sécurité à Intelligence Distribuée. Autre [cs.OH]. Institut National Polytechnique de Lorraine, 2008. Français. ⟨NNT : 2008INPL083N⟩. ⟨tel-01748701⟩

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