关键词: 液压系统;模糊故障树分析;T-S模型;故障概率;故障程度

Abstract:

In order to solve the three disadvantages of insufficient fault probabilities and difficulties to determine events’ relationships and describe fault degrees during fault tree analysis on hydraulic systems, T-S model was presented to fuzzy fault tree analysis, where fault probabilities were described as fuzzy possibilities; and events’ relationships were described by T-S gates instead of conventional logic gates; then fault degrees were described as fuzzy numbers.Example of fault tree analysis of oil supply system of hydraulic press was given for illustration, where fuzzy fault possibilities of top event and fault degrees are achieved.

Key words: hydraulic system, fuzzy fault tree analysis, T-S model, fault probability, fault degree