Research on fuzzy diagnosis method for air brake of diesel locomotive

ZHANG Zhonghai, OU Changjin, DING Jianbo
（Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,
Zhejiang University of Technology, Hangzhou 310014, China）

Abstract: In order to solve the problems of diagnosis method for air brake of diesel locomotive hysteresisfree, a diagnosis method to combine the wavelet analysis with the expression of fuzzy production rule was investigated.After the analysis of relationship between the brake of diesel locomotives varying rate of internal pipeline pressure and its fault cause, a method was presented to combine the wavelets multiscale edge detection for extracting the symptom of the failures with the expression of multiple symptom fuzzy diagnosis knowledge. The diagnosis methods for air brake of diesel locomotive were tested. The experimental results show that the diagnosis system can improve the realtime and veracity of the diagnosis for air brake of diesel locomotive effectively.
Key words: brake; varying rate of pressure ; wavelet transform; weighted fuzzy production rules