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Li, Zhixuan; Zhang, Kai; Liu, Yongzhi; Zou, Yisheng; Ding, Guofu
IEEE transactions on instrumentation and measurement, 2022, Volume: 71Journal Article
The transfer learning method represented by domain adaptation (DA) can effectively improve the prediction accuracy of rolling bearings' remaining useful life (RUL) under different working conditions. However, the difference in the bearing degradation process under the same working conditions limits the reliability and generalization of the transfer RUL prediction model. Owing to the aforementioned problems, this study proposed an RUL transfer predicting method for rolling bearings based on working conditions' common benchmark. An attention mechanism autoencoder is proposed to extract the common benchmark under each working condition and improve the commonness between deep features. The dynamic benchmark constraint under the same working conditions was proposed to ensure the reliability of a common benchmark and improve the prediction accuracy in the process of benchmark transfer under different working conditions. Verified by XJTU-SY bearing datasets, the proposed method can effectively obtain a common benchmark that can be used for DA under various working conditions. In the experimental design of six sets of RUL prediction tests under different working conditions, more than 50% of the experimental tasks have better prediction results using the proposed method. The proposed approach increases the overall prediction accuracy to 11.74% compared with the method without DA. Experimental results show that the proposed method can better meet the needs of intelligent operation and maintenance in practical engineering.
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