Journal
MEASUREMENT SCIENCE AND TECHNOLOGY
Volume 30, Issue 5, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/1361-6501/ab0793
Keywords
fault diagnosis; transfer learning; convolutional neural network; 2D image representation; bearing
Funding
- National Science Foundation of China [51767022, 51575469]
- Outstanding Doctor Graduate Student Innovation Project ensemble [XJUBSCX-2016017]
- Graduate Student Innovation Project of Xinjiang Uygur Autonomous Region [XJGRI2017006]
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Traditional methods used for intelligent condition monitoring and diagnosis significantly depend on manual feature extraction and selection. To address this issue, a transfer learning-convolutional neural network (TLCNN) based on AlexNet is proposed for bearing fault diagnosis. Firstly, a 2D image representation method converts vibration signals to 2D timefrequency images. Secondly, the proposed TLCNN model extracts the features of the 2D time-frequency images and achieves the classification conditions of the bearing, which is faster to train and more accurate. Thirdly, t-distributed stochastic neighbor embedding (t-SNE) is applied to visualize the feature learning process to demonstrate the feature learning ability of the proposed model. The experimental results verify that the proposed fault diagnosis model has higher accuracy and has much better robustness against noise than other deep learning and traditional methods.
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