Reliability Analysis of Air Conditioning System of Multiple Unit Based on Triangular Intuitionistic Fuzzy Fault Tree
An analysis method based on triangular intuitionistic fuzzy fault tree is proposed to address the problem of fuzzy logical relationships between various components in the air conditioning system of multiple unit due to certain hesitation factors in the uncertainty of fault data.Based on the statistics of the fault data of the air conditioning system of CRH5 EMU and the experience of multiple experts,a multi-objective decision-making method based on the intuitionistic fuzzy set of triangular fuzzy numbers is used to correct the fuzzy probability of the bottom event evaluated by experts.Secondly,the T-S fuzzy gates are used instead of conventional logic gates to describe the connections between events,reflecting the fuzziness of the system fault mechanisms and the event connections,and a T-S fuzzy fault tree model for air conditioning system is built.Finally,the reliability index of the air conditioning system of multiple unit is calculated based on the triangular intuitionistic fuzzy fault tree.Through analysis and verification,the study result shows that this method can better reflect the fuzziness of the logic relationships between components of a complex system so as to more effectively represent the polymorphism of the air conditioning system with the T-S fault tree,providing a reference for the maintenance of the air conditioning system of multiple unit.
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