1. 西安交通大学现代设计及转子轴承系统教育部重点实验室,西安,710049
2. 西安交通大学陕西省机械产品质量保障与诊断重点实验室,西安,710049
: 2022-04-20。作者简介: 康涛(1998—),男,硕士生
廖与禾(通信作者),男,副教授,博士生导师。基金项目: 国家自然科学基金资助项目(51575424)
网络首发:2022-12-10,
纸质出版:2022
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康涛, 段蓉凯, 杨磊, 等. 融合多注意力机制的卷积神经网络轴承故障诊断方法[J]. 西安交通大学学报, 2022,56(12):68-77.
KANG Tao, DUAN Rongkai, YANG Lei, et al. Bearing Fault Diagnosis Using Convolutional Neural Network Based on a Multi-Attention Mechanism[J]. 2022, 56(12): 68-77.
康涛, 段蓉凯, 杨磊, 等. 融合多注意力机制的卷积神经网络轴承故障诊断方法[J]. 西安交通大学学报, 2022,56(12):68-77. DOI: 10.7652/xjtuxb202212007.
KANG Tao, DUAN Rongkai, YANG Lei, et al. Bearing Fault Diagnosis Using Convolutional Neural Network Based on a Multi-Attention Mechanism[J]. 2022, 56(12): 68-77. DOI: 10.7652/xjtuxb202212007.
针对卷积神经网络学习关键故障特征的能力不足从而影响轴承故障诊断准确率的问题
提出一种融合多注意力机制的卷积神经网络自适应抗噪模型(MACNN)。利用通道和时间的复合注意力机制优化学习机制
从不同角度抑制噪声及无关信号分量等干扰信息的影响
并自适应地增强故障特征的响应; 引入残差连接
防止网络性能退化。采用多尺度特征提取方法
通过通道注意力机制自适应融合不同尺度下提取的特征。使用分类器进行滚动轴承故障诊断。实验结果表明:与没有实施注意力机制的模型相比
轴承故障诊断准确率平均提升了22.12%; 所提方法在各噪声背景下的故障识别准确率均在98.5%以上
验证了其自适应抗噪能力; 在跨载荷实验中
模型故障诊断准确率保持在88%以上
相比其他方法
MACNN的抗噪性能和稳定性更优。
The convolutional neural network does not work well in learning the key fault characteristics affecting the accuracy of bearing fault diagnosis. To address this problem
this paper proposes an adaptive anti-noise model using the convolutional neural network based on a multi-attention mechanism(MACNN). The model uses the channel-time composite attention mechanism to optimize the learning mechanism so as to suppress the influence of noise and irrelevant signal components from different aspects and adaptively enhance the fault features. In addition
residual connection is introduced in this module to prevent network performance degradation. The multi-scale feature extraction method is used to extract the features from different scales and adaptively fuse them by the channel attention mechanism. Finally
a classifier is applied for rolling bearing fault diagnosis. According to the experimental results the accuracy of the proposed model is increased by 22.12% on average compared with the model without an attention mechanism. The recognition accuracy of the model is above 98.5% in all noise backgrounds
which verifies its adaptive anti-noise ability. In the cross-load experiment
the accuracy of the model is above 88%. Compared with other methods
MACNN has better anti-noise performance and stability.
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