关键词: BP网络, 故障诊断, D-S证据理论

Abstract:

In order to avoid inherent defect of single information in the fault diagnosis,and to improve the diagnostic accuracy,the improved BP neural network is combined with the D-S evidence theory.For the three gauge points of gear-box,the improved BP neural network is used for independent and local fault diagnosis,and then the neural network output results of them is fused by D-S evidence theory rules,and the whole gear-box fault diagnosis is obtained.Through the analysis,one can see that the fused diagnosis result is more accurate,and the trust is higher.

Key words: BP network;Fault diagnosis;D-S evidence theory