Multi-modal adaptive feature extraction for early-stage weak fault diagnosis in bearings

We present a novel multi-modal adaptive feature extraction algorithm considering both time-domain and frequency-domain modalities (AFETF), coupled with a Bidirectional Long Short-Term Memory (Bi-LSTM) network based on the Grey Wolf Optimizer (GWO) for early-stage weak fault diagnosis in bearings. Si...

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Bibliographic Details
Published inElectronic research archive Vol. 32; no. 6; pp. 4074 - 4095
Main Authors Xu, Zhenzhong, Chen, Xu, Yang, Linchao, Xu, Jiangtao, Zhou, Shenghan
Format Journal Article
LanguageEnglish
Published AIMS Press 01.01.2024
Subjects
afetf
bearings
frequency domain
time domain
weak fault
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Summary:We present a novel multi-modal adaptive feature extraction algorithm considering both time-domain and frequency-domain modalities (AFETF), coupled with a Bidirectional Long Short-Term Memory (Bi-LSTM) network based on the Grey Wolf Optimizer (GWO) for early-stage weak fault diagnosis in bearings. Singular Value Decomposition (SVD) was employed for noise reduction, while Complete Ensemble Empirical Mode Decomposition with Adaptive Noise (CEEMDAN) was utilized for signal decomposition, facilitating further signal processing. AFETF algorithm proposed in this paper was employed to extract weak fault features. The adaptive diagnostic process was further enhanced using Bi-LSTM network optimized with GWO, ensuring objectivity in the hyperparameter optimization. The proposed method was validated for datasets containing weak faults with a 0.2 mm crack and strong faults with a 0.4 mm crack, demonstrating its effectiveness in early-stage fault detection.
ISSN:2688-1594
2688-1594
DOI:10.3934/era.2024183