An Auxiliary Branch Semisupervised Domain Generalization Network for Unseen Working Conditions Bearing Fault Diagnosis

IF 4.3 2区 综合性期刊 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Liang Zeng;Xinyu Chang;Jia Chen;Shanshan Wang
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引用次数: 0

Abstract

Deep learning-based methods have made remarkable achievements in rolling bearing fault diagnosis in recent years. Nevertheless, due to the diversity and complexity of rolling bearing working conditions, how to generalize deep learning models trained under limited conditions to unseen working conditions has become a popular issue in current research. The existing methods based on domain generalization usually need to train the model using a significant quantity of labeled data under multiple known working conditions to enhance its generalization capabilities under unseen working conditions. However, the acquisition of adequately labeled samples is a time-consuming and laborious task. Therefore, this article proposes an auxiliary branching semi-supervised domain generalization network (ABSDGN). ABSDGN employs a joint learning strategy of the auxiliary and main branches. The auxiliary branch generates high-confidence pseudolabels for the unlabeled source-domain data using the labeled source-domain data. The main branch leverages both real and pseudolabels to learn domain-invariant knowledge. Meanwhile, a quadratic neuron-based convolution (QConv) is introduced to take advantage of its powerful nonlinear and higher order feature representation capabilities in enhancing the performance and generalization of the model in complicated situations. In addition, a weight decomposition method based on domain labels is proposed to decompose the main branch classifier into a generic feature and feature-specific classifier to better explore the universal knowledge among different domains. The experimental results show that the proposed model has better diagnostic accuracy and stability than the most advanced semisupervised domain generalization method on two-bearing datasets.
一种辅助分支半监督域泛化网络在非可见工况轴承故障诊断中的应用
近年来,基于深度学习的方法在滚动轴承故障诊断中取得了显著的成果。然而,由于滚动轴承工作状态的多样性和复杂性,如何将有限条件下训练的深度学习模型推广到未知工况已成为当前研究的热点问题。现有的基于领域泛化的方法通常需要在多个已知工况下使用大量的标记数据对模型进行训练,以增强模型在未知工况下的泛化能力。然而,获得充分标记的样品是一项费时费力的任务。为此,本文提出了一种辅助分支半监督域泛化网络(ABSDGN)。ABSDGN采用辅助分支和主分支的联合学习策略。辅助分支使用已标记的源域数据为未标记的源域数据生成高置信度的伪标签。主分支利用真实和伪标签来学习领域不变的知识。同时,引入基于二次神经元的卷积(QConv),利用其强大的非线性和高阶特征表示能力,提高模型在复杂情况下的性能和泛化能力。此外,提出了一种基于领域标签的权重分解方法,将主分支分类器分解为通用特征和特定特征分类器,以更好地探索不同领域之间的通用知识。实验结果表明,该模型比目前最先进的半监督域泛化方法在双方位数据集上具有更好的诊断精度和稳定性。
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来源期刊
IEEE Sensors Journal
IEEE Sensors Journal 工程技术-工程:电子与电气
CiteScore
7.70
自引率
14.00%
发文量
2058
审稿时长
5.2 months
期刊介绍: The fields of interest of the IEEE Sensors Journal are the theory, design , fabrication, manufacturing and applications of devices for sensing and transducing physical, chemical and biological phenomena, with emphasis on the electronics and physics aspect of sensors and integrated sensors-actuators. IEEE Sensors Journal deals with the following: -Sensor Phenomenology, Modelling, and Evaluation -Sensor Materials, Processing, and Fabrication -Chemical and Gas Sensors -Microfluidics and Biosensors -Optical Sensors -Physical Sensors: Temperature, Mechanical, Magnetic, and others -Acoustic and Ultrasonic Sensors -Sensor Packaging -Sensor Networks -Sensor Applications -Sensor Systems: Signals, Processing, and Interfaces -Actuators and Sensor Power Systems -Sensor Signal Processing for high precision and stability (amplification, filtering, linearization, modulation/demodulation) and under harsh conditions (EMC, radiation, humidity, temperature); energy consumption/harvesting -Sensor Data Processing (soft computing with sensor data, e.g., pattern recognition, machine learning, evolutionary computation; sensor data fusion, processing of wave e.g., electromagnetic and acoustic; and non-wave, e.g., chemical, gravity, particle, thermal, radiative and non-radiative sensor data, detection, estimation and classification based on sensor data) -Sensors in Industrial Practice
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