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ISSN 2753-3239
CCC: 1
PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE
Edited by: J. Pombo
Paper 27.21

Hybrid Feature Selection and Fault Identification of Train Bearings Based on Integrated Learning

Y.X. Li1,2, S.C. Xie1,2 and R.D. Liu1,2

1Key Laboratory of Traffic Safety on Track, Ministry of Education, Central South University, Changsha, China
2Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, China

Full Bibliographic Reference for this paper
Y.X. Li, S.C. Xie, R.D. Liu, "Hybrid Feature Selection and Fault Identification of Train Bearings Based on Integrated Learning", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 27.21, 2022, doi:10.4203/ccc.1.27.21
Keywords: train bearing fault diagnosis, integrated learning, feature selection, XGBoost.

Abstract
This fast and accurate implementation of train bearing fault identification has been one of the key tasks of intelligent train health maintenance. In recent years, with the development of deep network technology, some bearing fault identification solutions based on deep learning have shown strong competitiveness. However, in the process of actual train application and maintenance, it has higher requirements for data volume and more complicated calculation. Therefore, an integrated learning-based bearing fault identification scheme is proposed. Overlapping sampling is performed considering the correlation before and after time series. Feature sets are constructed based on the characteristics of train fault signals and improved based on the XGBoost (Extreme Gradient Boosting) algorithm to achieve adaptive hybrid feature selection as well as fault identification. The effectiveness and superiority over the above method is verified by testing and evaluating two open-sources bearing datasets and laboratory bearing datasets.

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