A Multi-Scale Attention Mechanism Based Domain Adversarial Neural Network Strategy for Bearing Fault Diagnosis

被引:9
作者
Zhang, Quanling [1 ]
Tang, Ningze [1 ]
Fu, Xing [1 ]
Peng, Hao [2 ]
Bo, Cuimei [3 ]
Wang, Cunsong [1 ]
机构
[1] Nanjing Tech Univ, Inst Intelligent Mfg, Nanjing 210009, Peoples R China
[2] Nanjing Tech Univ, Coll Mech & Power Engn, Nanjing 211816, Peoples R China
[3] Nanjing Tech Univ, Coll Elect Engn & Control Sci, Nanjing, Peoples R China
基金
中国国家自然科学基金;
关键词
bearing; multi-scale feature extractor; attention mechanism; domain adversarial; fault diagnosis;
D O I
10.3390/act12050188
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
There are a large number of bearings in aircraft engines that are subjected to extreme operating conditions, such as high temperature, high speed, and heavy load, and their fatigue, wear, and other failure problems seriously affect the reliability of the engine. The complex and variable bearing operating conditions can lead to differences in the distribution of data between the source and target operating conditions, as well as insufficient labels. To solve the above challenges, a multi-scale attention mechanism-based domain adversarial neural network strategy for bearing fault diagnosis (MADANN) is proposed and verified using Case Western Reserve University bearing data and PT500mini mechanical bearing data in this paper. First, a multi-scale feature extractor with an attention mechanism is proposed to extract more discriminative multi-scale features of the input signal. Subsequently, the maximum mean discrepancy (MMD) is introduced to measure the difference between the distribution of the target domain and the source domain. Finally, the fault diagnosis process of the rolling is realized by minimizing the loss of the feature classifier, the loss of the MMD distance, and maximizing the loss of the domain discriminator. The verification results indicate that the proposed strategy has stronger learning ability and better diagnosis performance than shallow network, deep network, and commonly used domain adaptive models.
引用
收藏
页数:20
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