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Dynamic fault tree analysis method can be used to model and analyze reliability of complex engineering systems with dynamic failure characteristics. By incorporating the Bayesian Networks into dynamic fault tree method can alleviate the state space explosion problem involving in the latter. Based on Bayesian networks, a novel dynamic fault tree analysis method under fuzzy numbers is presented in this...
In this article, for the Linux operating system environment, with the characteristics of ambiguity and uncertainty for the occurrence probability of system failures, fuzzy theory is introduced into the fault tree analysis. The occurrence probability of basic events in the conventional fault tree is made fuzzy by introducing the concept of fuzzy sets. Using the upstream method for solving the minimum...
Fault tree analysis (FTA) is a top-down approach for failure analysis, starting with a potential undesirable event called a TOP event, and then determining all the ways it can happen. FTA is the most commonly used technique for causal analysis in risk and reliability studies. Mask stage an important part of lithography. In this paper, Fault Tree of the mask stage is built with “Mask stage doesn't...
At present, many large-scale mechanical system has complex structure, which makes the fault of it has characteristics of complexity, ambiguity and uncertainty. Based on the introduction of basic theory of the fuzzy fault tree analysis method and aim at the characteristics of ambiguity and uncertainty of the mechanical failure probability, the paper introduced fuzzy set theory into mechanical fault...
Due to the complicacy of the communication control system (CCS) structure and the variations in operating conditions, the occurrence of a fault inside CCS is uncertain and random. Aiming at limitations of the current fault diagnosis of CCS, the paper presents an approach to fault diagnosis of fuzzy fusion based on fuzzy fault tree. Elaborated method considers the characteristic of diagnostic object...
The concept of median value based on confidence level for fuzzy numbers is proposed, and itpsilas discussed with triangular fuzzy numbers. Compared with the concept defined before, the median value based on confidence level could improve the membership level manifestly, and enhance the credibility of median to replacing fuzzy number visibly. The effectiveness and usefulness of median value based on...
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