Restricted accessResearch articleFirst published online 2026
Hybrid temporal convolutional network with feature enhancement and adaptive threshold for the prediction of bearing remaining useful life under noise interference
Due to its broad receptive field and ability to eliminate future information leakage, the temporal convolutional network (TCN) has been widely used in the remaining useful life (RUL) estimation of bearings. However, the predictive capability of TCN is constrained by the distortion during degraded feature acquisition and the loss during feature extraction. To address these issues, a hybrid TCN with feature enhancement and adaptive threshold (HTCN-FA) is proposed. Firstly, a plug-and-play resilient nonlinear blind deconvolution (RNBD)-net subnetwork without reliance on prior knowledge is designed to enhance the representation of degraded features. Secondly, a theoretically rigorous and interpretable metric, harmonic distribution clarity, is introduced to monitor the operational condition of bearings. Thirdly, TCN blocks with adaptive thresholds and hybrid branches are employed to avoid the loss of degraded characteristics. Finally, datasets from twelve bearings under three working conditions are employed to validate the prediction and generalization performance of the proposed HTCN-FA. The results demonstrate that the proposed HTCN-FA outperforms existing methods in fault monitoring and RUL prediction while exhibiting superior noise adaptability.
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