Abstract:Aiming at the problems of inconsistent distribution of bearing vibration data under different working conditions, under-adaptation and over-adaptation in the adaptive process of the source domain and target domain, a fault diagnosis method based on substructure optimal transport for bearings under different working conditions is proposed. First, the fault features in the bearing vibration data are extracted through wavelet transform, and the fault sample set is constructed. Then cluster the bearing fault sample sets in the source domain and the target domain to generate a substructure of the source domain and target domain fault sample data. And adaptively assign different weights to the data substructure of the source domain, and assign the same weight to the data substructure of the target domain to complete the mapping of the data substructure of the source domain. Finally, using the mapped source domain data substructure and its corresponding labels, the support vector machine model is trained and the fault diagnosis of the bearing under the target working condition is realized through the trained model. The proposed method is verified on the mechanical comprehensive fault simulation experimental platform and the bearing dataset of Case Western Reserve University, and compared with traditional machine learning and other transfer learning methods. The experimental results show the effectiveness and superiority of the method.
朱良玉,崔倩文,胡超凡,何水龙. 基于子结构最优传输的跨工况轴承故障诊断方法[J]. 振动与冲击, 2023, 42(7): 273-280.
ZHU Liangyu, CUI Qianwen, HU Chaofan, HE Shuilong. Fault diagnosis method of bearing under cross working conditions based on substructure optimal transmission. JOURNAL OF VIBRATION AND SHOCK, 2023, 42(7): 273-280.
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