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Existing single-channel networks have poor noise immunity during fault diagnosis of rotating machinery due to the many noises associated with the operation of rotating machinery. To address this problem, a two-channel input LetNet-5 convolutional neural network model incorporating a parallel mechanism was proposed. Case Western Reserve University bearing dataset was used for the model plausibility check process, based on which Gaussian white noise with a signal-to-noise ratio of -10 dB was added to simulate the real noise situation. The short-time Fourier transform was used to process the motor fan-side and drive-side vibration data, and the resulting time-frequency images were passed to a two-channel input LetNet-5 convolutional neural network for training and learning. The results show that, the dual-channel input LetNet-5 convolutional neural network model is able to capture the fault features in a strong noise environment well, it has higher efficiency and accuracy than the multi-scale feature fusion residual model, the multimodal coupled input neural network model, the conventional K-nearest neighbour and decision tree model and the single-channel input LetNet-5 convolutional neural network model.

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针对旋转机械运行过程中伴随着诸多噪声,现有单通道网络在旋转机械故障诊断过程中抗噪性较差的问题,提出了一种加入并联机制的双通道输入LetNet-5卷积神经网络模型。模型合理性检验过程采用了凯斯西储大学轴承数据集,在此基础上,添加信噪比为–10 dB的高斯白噪声模拟真实噪声情形;采用短时傅里叶变换将电机风扇端和驱动端振动数据进行处理,获得的时频图像传递至双通道输入的LetNet-5卷积神经网络进行训练学习。研究结果表明:双通道输入LetNet-5卷积神经网络模型能够良好捕捉到强噪声环境下的故障特征;相比于多尺度特征融合残差模型、多模态耦合输入神经网络模型、传统的K近邻与决策树模型及单通道输入LetNet-5卷积神经网络模型,双通道输入LetNet-5卷积神经网络具有更高的效率和精度。

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付忠广(1963),男,博士,教授,主要研究方向为电站机组运行优化及复杂热力系统建模、大数据与人工智能、旋转机械故障诊断等,

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付忠广(1963),男,博士,教授,主要研究方向为电站机组运行优化及复杂热力系统建模、大数据与人工智能、旋转机械故障诊断等,

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付忠广(1963),男,博士,教授,主要研究方向为电站机组运行优化及复杂热力系统建模、大数据与人工智能、旋转机械故障诊断等,

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双通道输入LetNet-5卷积神经网络旋转机械故障诊断模型研究
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付忠广 , 王诗云 , 高玉才 , 周湘淇
热力发电 | 风电系统故障诊断及状态监测技术 2023,52(3): 81-87
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热力发电 | 风电系统故障诊断及状态监测技术 2023, 52(3): 81-87
双通道输入LetNet-5卷积神经网络旋转机械故障诊断模型研究
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付忠广 , 王诗云, 高玉才, 周湘淇
作者信息
  • 华北电力大学电站能量传递转化与系统教育部重点实验室,北京 102206
  • 付忠广(1963),男,博士,教授,主要研究方向为电站机组运行优化及复杂热力系统建模、大数据与人工智能、旋转机械故障诊断等,

Research on fault diagnosis model of rotating machinery based on two-channel input LetNet-5 convolution neural network
Zhongguang FU , Shiyun WANG, Yucai GAO, Xiangqi ZHOU
Affiliations
  • Key Laboratory of Power Station Energy Transfer, Transformation And System, Ministry of Education, North China Electric Power University, Beijing 102206, China
出版时间: 2023-03-25 doi: 10.19666/j.rlfd.202210240
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针对旋转机械运行过程中伴随着诸多噪声,现有单通道网络在旋转机械故障诊断过程中抗噪性较差的问题,提出了一种加入并联机制的双通道输入LetNet-5卷积神经网络模型。模型合理性检验过程采用了凯斯西储大学轴承数据集,在此基础上,添加信噪比为–10 dB的高斯白噪声模拟真实噪声情形;采用短时傅里叶变换将电机风扇端和驱动端振动数据进行处理,获得的时频图像传递至双通道输入的LetNet-5卷积神经网络进行训练学习。研究结果表明:双通道输入LetNet-5卷积神经网络模型能够良好捕捉到强噪声环境下的故障特征;相比于多尺度特征融合残差模型、多模态耦合输入神经网络模型、传统的K近邻与决策树模型及单通道输入LetNet-5卷积神经网络模型,双通道输入LetNet-5卷积神经网络具有更高的效率和精度。

故障诊断  /  振动  /  深度学习  /  双通道  /  噪声

Existing single-channel networks have poor noise immunity during fault diagnosis of rotating machinery due to the many noises associated with the operation of rotating machinery. To address this problem, a two-channel input LetNet-5 convolutional neural network model incorporating a parallel mechanism was proposed. Case Western Reserve University bearing dataset was used for the model plausibility check process, based on which Gaussian white noise with a signal-to-noise ratio of -10 dB was added to simulate the real noise situation. The short-time Fourier transform was used to process the motor fan-side and drive-side vibration data, and the resulting time-frequency images were passed to a two-channel input LetNet-5 convolutional neural network for training and learning. The results show that, the dual-channel input LetNet-5 convolutional neural network model is able to capture the fault features in a strong noise environment well, it has higher efficiency and accuracy than the multi-scale feature fusion residual model, the multimodal coupled input neural network model, the conventional K-nearest neighbour and decision tree model and the single-channel input LetNet-5 convolutional neural network model.

fault diagnosis  /  vibration  /  deep learning  /  dual-channel  /  noise
付忠广, 王诗云, 高玉才, 周湘淇. 双通道输入LetNet-5卷积神经网络旋转机械故障诊断模型研究. 热力发电, 2023 , 52 (3) : 81 -87 . DOI: 10.19666/j.rlfd.202210240
Zhongguang FU, Shiyun WANG, Yucai GAO, Xiangqi ZHOU. Research on fault diagnosis model of rotating machinery based on two-channel input LetNet-5 convolution neural network[J]. Thermal Power Generation, 2023 , 52 (3) : 81 -87 . DOI: 10.19666/j.rlfd.202210240
  • 北京市自然科学基金项目(3162030)
2023年第52卷第3期
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doi: 10.19666/j.rlfd.202210240
  • 接收时间:2022-10-24
  • 首发时间:2026-01-23
  • 出版时间:2023-03-25
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  • 收稿日期:2022-10-24
基金
Natural Science Foundation of Beijing(3162030)
北京市自然科学基金项目(3162030)
作者信息
    华北电力大学电站能量传递转化与系统教育部重点实验室,北京 102206
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2种不同金属材料的力学参数

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Genus
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Number of
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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