Abstract
Feature extraction is of great significance in the traditional bearing fault diagnosis methods which detect incipient defects by identifying peaks at characteristic defect frequencies in the envelope power spectrum or by developing discriminative models for features extracted from the signals through time and frequency domain analysis. This issue not only requires expert knowledge to design discriminative features but also requires appropriate feature selection algorithms to eliminate irrelevant and redundant features that degrade the performance of the methods. In this paper, we present a convolutional neural networks (CNNs) based method to automatically derive optimal features which not require any feature extraction or feature selection. The proposed method identifies bearing defects efficiently by processing feature extraction and classification into a single learning machine and automatically extracts optimal features from these energy distribution maps to diagnose various single and compound bearing defects and yields better diagnostic performance compared to state-of-the-art AE-based methods.
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Acknowledgements
This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (Nos. 20162220100050, 20161120100350, 20172510102130). It was also funded in part by The Leading Human Resource Training Program of Regional Neo industry through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2016H1D5A1910564), and in part by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A3B03931927).
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Tra, V., Kim, J., Kim, JM. (2019). Fault Diagnosis of Bearings with Variable Rotational Speeds Using Convolutional Neural Networks. In: Bhatia, S., Tiwari, S., Mishra, K., Trivedi, M. (eds) Advances in Computer Communication and Computational Sciences. Advances in Intelligent Systems and Computing, vol 759. Springer, Singapore. https://doi.org/10.1007/978-981-13-0341-8_7
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DOI: https://doi.org/10.1007/978-981-13-0341-8_7
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