Développement d'une méthodologie conjointe d'analyse structurelle et de sûreté de fonctionnement des propriétés d'un système complexe

Abstract : This thesis concerns the development of analysis of structural properties in interaction with indicators of reliability. Our study focuses on (linear, bilinear or switching) structured systems, they must verify some important properties for the accomplishment of their mission. Properties depend on the structure of the system, hence the term "structural properties". The structure of the system can be represented by a graph consisting of vertices and edges. Verification of structural properties depends mainly on four basic conditions of connectivity, link distance and complete linkage. We have developed algorithms to express the form of Boolean expressions based on the edges of the graph representing the system. We consider that each edge is linked to the system components. A failure at the component level can cause changes in the structure of the system, and therefore can make a structural property unsatisfied. Thus, the structural properties are written as boolean expressions based on the operating state of the components. Using boolean expressions associated to the structural properties, reliability and / or availability can be calculated knowing the characteristics of the system components. Through this study, we can check if during the mission time of the system, a structural property remain satisfied and / or comply with a level of performance required by the specifications
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Manal Dakil. Développement d'une méthodologie conjointe d'analyse structurelle et de sûreté de fonctionnement des propriétés d'un système complexe. Autre. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0133⟩. ⟨tel-01750979⟩

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