Fuzzy Fault Tree Analysis of Railway Traffic Safety
Нечеткий анализ дерева отказов безопасности железнодорожного движения
2000-07-12
SCID: 54.1/vgbnmxra
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extension principlefuzzy fault treepossibility of failurerailway traffic safety
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Abstract (AI)
The safety analysis of railway traffic system is presented in this paper. Fuzzy fault tree technique has been adopted in safety analysis. The main traffic accidents—top events of fault trees—have been analyzed down to the level of human errors and hardware failures. In the fuzzy fault-tree model, the possibility of failure, i.e. a fuzzy set defined in probability space, is proposed to replace the probability of failures. The maximum possibility of railway traffic system failure is determined from the possibility of failure of each unit within the system according to the extension principle. An example is given to illustrate the method.
Key Findings
1
A fuzzy fault tree technique is applied to railway traffic safety analysis, modeling main accidents down to human errors and hardware failures.
2
An illustrative example demonstrates the proposed fuzzy fault-tree method on a railway traffic system.
3
Failure likelihoods are represented as fuzzy sets in probability space, replacing traditional probabilities with possibilities.
4
The maximum possibility of system failure is computed from unit failure possibilities using the extension principle.
Research Object
Railway traffic system
Research Subject
Safety (failure) analysis using fuzzy fault tree method, i.e., assessing possibility of system-level failures from human errors and hardware failures via fuzzy possibility measures and extension principle
Publication Details
Publication Date
2000-07-12
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