Method for Diagnosing Bearing Faults in Electromechanical Equipment Based on Improved Prototypical Networks

doi:10.3390/s23094485

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	Method for Diagnosing Bearing Faults in Electromechanical Equipment Based on Improved Prototypical Networks
	Z. Wang, H. Shen, W. Xiong, X. Zhang and J. Hou
	2023
发表期刊	Sensors
ISSN	14248220
卷号	23 期号:9
摘要	Due to the complexity of electromechanical equipment and the difficulties in obtaining large-scale health monitoring datasets, as well as the long-tailed distribution of data, existing methods ignore certain characteristics of health monitoring data. In order to solve these problems, this paper proposes a method for the fault diagnosis of rolling bearings in electromechanical equipment based on an improved prototypical network—the weight prototypical networks (WPorNet). The main contributions of this paper are as follows: (1) the prototypical networks, which perform well on small-sample classification tasks, were improved by calculating the different levels of influence of support sample distributions in order to achieve the prototypical calculation. The change in sample influence was calculated using the Kullback–Leibler divergence of the sample distribution. The influence change in a specific sample can be measured by assessing how much the distribution changes in the absence of that sample; and (2) The Gramian Angular Field (GAF) algorithm was used to transform one-dimensional time series into two-dimensional vibration images, which greatly improved the application effect of the 2D convolutional neural network (CNN). Through experiments on MAFAULDA and CWRU bearing datasets, it was shown that this network effectively solves the shortcomings of a small number of valid samples and a long-tail distribution in health monitoring data, it enhances the dependency between the samples and the global data, it improves the model’s feature extraction ability, and it enhances the accuracy of model classification. Compared with the prototypical network, the improved network model increased the performance of the 2-way 10-shot, 2-way 20-shot, and 2-way 50-shot classification tasks by 5.23%, 5.74%, and 4.37%, respectively, and it increased the performance of the 4-way 10-shot, 4-way 20-shot, and 4-way 50-shot classification tasks by 12.02%, 10.47%, and 4.66%, respectively. Experimental results show that the improved prototypical network model has higher sample classification accuracy and stronger anti-interference ability compared with traditional small-sample classification models. © 2023 by the authors.
DOI	10.3390/s23094485
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收录类别	sci ; ei
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/68002
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Z. Wang, H. Shen, W. Xiong, X. Zhang and J. Hou. Method for Diagnosing Bearing Faults in Electromechanical Equipment Based on Improved Prototypical Networks[J]. Sensors,2023,23(9).
APA	Z. Wang, H. Shen, W. Xiong, X. Zhang and J. Hou.(2023).Method for Diagnosing Bearing Faults in Electromechanical Equipment Based on Improved Prototypical Networks.Sensors,23(9).
MLA	Z. Wang, H. Shen, W. Xiong, X. Zhang and J. Hou."Method for Diagnosing Bearing Faults in Electromechanical Equipment Based on Improved Prototypical Networks".Sensors 23.9(2023).

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