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Zhuang, Jichao; Jia, Minping; Ding, Yifei; Ding, Peng
Reliability engineering & system safety, December 2021, 2021-12-00, 20211201, Volume: 216Journal Article
The novelty of this research is as follows:(1)A new transportable cross-domain adaptation method is developed.(2)A residual self-attention is proposed to fully consider the contextual degradation information.(3)The contrastive loss is introduced to improve the complex transformation invariance of MK-MMD mapping. Many data-driven models normally assume that the training and test data are independent and identically distributed to predict the remaining useful life (RUL) of industrial machines. However, different failure models caused by variable failure behaviors may lead to a domain shift. Meanwhile, conventional methods lack comprehensive attention to temporal information, resulting in a limitation. To handle the aforementioned challenges, a transferable cross-domain approach for RUL estimation is proposed. The hidden features are extracted adaptively by a temporal convolution network in which residual self-attention is able to fully consider the contextual degradation information. Furthermore, a new cross-domain adaption architecture with the contrastive loss and multi-kernel maximum mean discrepancy is designed to learn the domain invariant features. The effectiveness and superiority of the proposed method are proved by the case study on IEEE PHM challenge 2012 bearing dataset and the comparison with other methods.
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