Fault Analysis of Wind Turbine Gearbox Based on Vague Set and Fault Tree

Abstract

Aiming at the high failure rate of gearbox-main components of wind turbine and the limitation of single diagnosis method, this paper proposes a fault diagnosis method based on the generalized set of the fuzzy set-the vague set, which combines the vague set and the fault tree. It is introduced into the fault tree model. The triangular Vague set defined on [0], [1] is used to describe the normal, failure and abnormal behavior of bottom events. Based on the fault tree model of the vague set, the qualitative and quantitative analysis of system faults is made. The vague fuzzy operator is used to calculate the importance of each bottom event and judge the weak links of the system. Finally, a wind power gearbox fault example is simulated. The simulation results show that the proposed method is more flexible and practical than the fuzzy fault tree model.