Reliability of the system with loops: Factor graph based approach

Young Ho Chae, Seung Geun Kim and Poong Hyun Seong

Reliability Engineering and System Safety, 2021, vol. 208, issue C

Abstract: Evaluating systems’ vulnerability is important in safety critical systems. For this reason, probabilistic safety assessments (PSAs) are widely conducted in the nuclear industry. To ensure efficient, and accurate reliability analyses, several reliability evaluation methods have been developed. The most familiar method is fault tree analysis. However, as the system becomes more complex, the fault tree structure becomes even more complicated. As an alternative, the graph-based reliability analysis method has been developed. However, conventional graph-based analyses have difficulty with considering a logical loop structure. Here, we suggest a factor graph and belief propagation algorithm based logical loop analysis method for intuitive logical loop consideration. To solve the problem efficiently we modified the belief propagation rules. The proposed methodology was successfully applied to 3-system-in-loop and 4-system- in-loop.

Keywords: Probabilistic safety assessment; Reliability analysis; Logical loop; Factor graph; Belief propagation (search for similar items in EconPapers)
Date: 2021
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:208:y:2021:i:c:s0951832020308930

DOI: 10.1016/j.ress.2020.107407

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