An improved prototype network method for small sample bearing fault diagnosis
ZHAO Zhihong1,2, ZHANG Ran2, LIU Kejian2, YANG Shaopu1
1.State Key Laboratory of Mechanical Behavior in Traffic Engineering Structure and System Safety, Shijiazhuang Tiedao University, Shijiazhuang 050043, China;
2.School of Computation and Informatics, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
Abstract:In the fault diagnosis of prototype network with small samples, the accuracy of the prototype is not very good because of the small number of fault samples and the influence of outliers. In order to improve the accuracy of fault prototype representation, a small sample fault diagnosis method based on improved prototype network is proposed in this paper. By introducing an auxiliary classification task to extract more robust features, the distinguishing ability of extracted features is improved. In addition, the query set sample is used to further optimize the class prototype to improve the representation ability of the class prototype to the fault bearing. To verify the effectiveness of the proposed method, set K to different values, and conduct C-way K-shot fault diagnosis experiments on the rolling bearing data set. The experimental results show that the prototype obtained by the improved prototype network has better discrimination and accuracy. In the 10 way 5-shot experiment, the accuracy of the proposed method is 5.1% higher than that of the traditional prototype network.
赵志宏1,2,张然2,刘克俭2,杨绍普1. 一种改进原型网络的小样本轴承故障诊断方法[J]. 振动与冲击, 2023, 42(20): 214-221.
ZHAO Zhihong1,2, ZHANG Ran2, LIU Kejian2, YANG Shaopu1. An improved prototype network method for small sample bearing fault diagnosis. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(20): 214-221.
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