Fuzzy grey fault tree analysis on diesel engine reliability

The minimal cut sets and structure importance of bottom event are achieved by top-down method on diesel engine system downtime failures. The method of combining grey relational analysis with fuzzy membership function is presented to solve the probability of failure modes. Fuzzy grey fault tree model is proposed. The fuzzy relational degree is calculated and diesel engine weak links are found. The disadvantages about various multi-parameter dimension and magnitude differences are overcome. Example analysis shows that the model is accurate and reasonable.