期刊
MEASUREMENT
卷 93, 期 -, 页码 490-502出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2016.07.054
关键词
Fault diagnosis; Feature extraction; Adaptive learning rate; Deep convolution network; Hierarchical structure
资金
- National Natural Science Foundation of China [51505311]
- Natural Science Foundation of Jiangsu Province [BK20150339]
- China Postdoctoral Science Foundation [2015M580457, 2016T90490]
Traditional artificial methods and intelligence-based methods of classifying and diagnosing various mechanical faults with high accuracy by extracting effective features from vibration data, such as support vector machines and back propagation neural networks, have been widely investigated. However, the problems of extracting features automatically without significantly increasing the demand for machinery expertise and maximizing accuracy without overcomplicating machine structure have to date remained unsolved. Therefore, a novel hierarchical learning rate adaptive deep convolution neural network based on an improved algorithm was proposed in this study, and its use to diagnose bearing faults and determine their severity was investigated. To test the effectiveness of the proposed method, an experiment was conducted with bearing-fault data samples obtained from a test rig. The method achieved a satisfactory performance in terms of both fault-pattern recognition and fault-size evaluation. In addition, comparison revealed that the improved algorithm is well suited to the fault-diagnosis model, and that the proposed method is superior to other existing methods. (C) 2016 Elsevier Ltd. All rights reserved.
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