Reliability analysis of integrated transmission based on fuzzy multi-state fault tree

Integrated transmission is the key part of heavy vehicles, and its reliability could impact the performance of the vehicles directly. This paper proposes a fuzzy multi-state fault tree method for reliability analysis of the integrated transmission system. On the one hand, the multi-state logic tree can describe the complex failure states of the integrated transmission. On the other hand, most important empirical data and subjective information can be used with the help of the fuzzy theory, and it could avoid the waste of information in reliability analysis. The degradation performance of some parts in the integrated transmission is also considered in the reliability analysis. The multi-state fault tree is used to build the reliability model of the integrated transmission, and the fuzzy cut-set technique is used to calculate the reliability parameters of the fault tree. The application demonstrates that the method proposed in this paper could get good results in the integrated transmission reliability analysis.