RESEARCH PAPER
Multi-feature spatial distribution alignment enhanced domain adaptive method for tool condition monitoring
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1
College of mechanical and electrical engineering, Wenzhou University, China
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College of mechanical and electrical engineering, Jiaxing Nanhu University, China
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Wenzhou University, China
Submission date: 2023-06-13
Final revision date: 2023-07-15
Acceptance date: 2023-08-31
Online publication date: 2023-09-05
Corresponding author
Yongjian Lou
College of mechanical and electrical engineering, Jiaxing Nanhu University, China
Eksploatacja i Niezawodność – Maintenance and Reliability 2023;25(4):171750
HIGHLIGHTS
- A domain adaptive method for aligning multi feature spatial distributions is proposed.
- A ResNet18_BiLSTM feature extraction model is proposed to reduce signal fluctuations.
- A soft threshold technique based on attention mechanism is proposed for informativeness.
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ABSTRACT
Transfer learning (TL) has been successfully implemented in tool condition monitoring (TCM) to address the lack of labeled data in real industrial scenarios. In current TL models, the domain offset in the joint distribution of input feature and output label still exists after the feature distribution of the two domains is aligned, resulting in performance degradation. A multiple feature spatial distribution alignment (MSDA) method is proposed, Including Correlation alignment for deep domain adaptation (Deep CORAL) and Joint maximum mean difference (JMMD). Deep CORAL is employed to learn nonlinear transformations, align source and target domains at the feature level through the second-order statistical correlations. JMMD is applied to improve domain alignment by aligning the joint distribution of input features and output labels. ResNet18 combining with bidirectional short-term memory network and attention mechanism is developed to extract the invariant features. TCM experiments with four transfer tasks were conducted and demonstrated the effectiveness of the proposed method.
ABBREVIATIONS
This project was supported by
the National Natural Science Foundation of China (No. 52275125), the Zhejiang Natural Science
Foundation of China (No. the General Project of the Department of Education of Zhejiang Province (No.
Y202249011 ), the Science and Technology Plan Project of Jiaxing city (Grant. 2023AY11013), and the Science and Technology Plan
Project of Wenzhou city (Grant. G20220006).
CITATIONS (1):
1.
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