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Vol. 158, Issue 11, November 2013, pp. 421-426




Railway Rolling Bearing Faults Diagnosis Based on Wavelet Packet and EKF Training RBF Neural Network
1 Xing WANG, 2 Yuan-Jing ZHAO

1 School of Computer Science and Technology, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China

2 Civil Engineering Department, Shanxi Institute of Economics and Business, Taiyuan Shanxi 030024, China

1 Tel.: 13994213969
E-mail: wangxing3969@126.com


Received: 19 August 2013   /Accepted: 25 October 2013   /Published: 30 November 2013

Digital Sensors and Sensor Sysstems


Abstract: Based on wavelet packet and extended Kalman filter (EKF) training RBF neural network method, a method for the fault diagnosis of railway rolling bearing is proposed in this paper. The wavelet packet and RBFNN are introduced. The wavelet packet is used to translate raw vibration signals of a railway rolling bearing into time-scale representation. Then, the wavelet packet energy eigenvector is constructed, next, those wavelet packet energy eigenvectors as fault samples for training RBF neural network. To ameliorate the algorithm, EKF is exploited to optimize the algorithm so as to determine the best values for "network connection weight", finally the fault patterns of the railway rolling bearings are identified. The results show that the proposed method is superior to the RBF neural network in extracting the fault characteristics of roller bearings. This method is effective and can be used for automotive recognition to rotary machine faults.


Keywords: Wavelet packet, Extended Kalman filter, RBF neural network, Railway rolling bearing, Fault diagnosis.


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