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Feature extraction and recognition for rolling element bearing fault utilizing short-time Fourier transform and non-negative matrix factorization

Abstract

Due to the non-stationary characteristics of vibration signals acquired from rolling element bearing fault, the time-frequency analysis is often applied to describe the local information of these unstable signals smartly. However, it is difficult to classify the high dimensional feature matrix directly because of too large dimensions for many classifiers. This paper combines the concepts of time-frequency distribution(TFD) with non-negative matrix factorization(NMF), and proposes a novel TFD matrix factorization method to enhance representation and identification of bearing fault. Throughout this method, the TFD of a vibration signal is firstly accomplished to describe the localized faults with short-time Fourier transform(STFT). Then, the supervised NMF mapping is adopted to extract the fault features from TFD. Meanwhile, the fault samples can be clustered and recognized automatically by using the clustering property of NMF. The proposed method takes advantages of the NMF in the parts-based representation and the adaptive clustering. The localized fault features of interest can be extracted as well. To evaluate the performance of the proposed method, the 9 kinds of the bearing fault on a test bench is performed. The proposed method can effectively identify the fault severity and different fault types. Moreover, in comparison with the artificial neural network(ANN), NMF yields 99.3% mean accuracy which is much superior to ANN. This research presents a simple and practical resolution for the fault diagnosis problem of rolling element bearing in high dimensional feature space.

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Corresponding author

Correspondence to Lin Liang.

Additional information

Supported by Shaanxi Provincial Overall Innovation Project of Science and Technology, China(Grant No. 2013KTCQ01-06)

GAO Huizhong, born in 1989, is currently an associate engineer at The 705 Research Institute, China Shipbuilding Industry Corporation, China. He received his master degree from Xi’an Jiaotong University, China, in 2014. His research interests concentrate on intelligent signal processing.

LIANG Lin, born in 1973, is currently working at Xi’an Jiaotong University, China. He received his PhD degree from Xi’an Jiaotong University, China, in 2007. His research interests include fault diagnosis and measurement.

CHEN Xiaoguang, born in 1988, is currently a PhD candidate at School of Mechanical Engineering, Xi’an Jiaotong University, China. He received his bachelor degree from Xi’an Jiaotong University, China, in 2010. His research interests include signal process and intelligent fault diagnosis.

XU Guanghua, born in 1964, is currently professor at Xi’an Jiaotong University, China. He received his PhD degree from Xi’an Jiaotong University, China, in 1995. His research interests include fault diagnosis and brain-computer interface.

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Gao, H., Liang, L., Chen, X. et al. Feature extraction and recognition for rolling element bearing fault utilizing short-time Fourier transform and non-negative matrix factorization. Chin. J. Mech. Eng. 28, 96–105 (2015). https://doi.org/10.3901/CJME.2014.1103.166

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  • DOI: https://doi.org/10.3901/CJME.2014.1103.166

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