吉林大学学报(工学版) ›› 2026, Vol. 56 ›› Issue (1): 96-108.doi: 10.13229/j.cnki.jdxbgxb.20240710

• 车辆工程·机械工程 • 上一篇    下一篇

基于多频带特征图和改进SqueezeNet的滚动轴承故障诊断

冯志刚1(),任梦媛1,董冰2,于明月1   

  1. 1.沈阳航空航天大学 自动化学院,沈阳 110136
    2.沈阳飞机工业(集团)有限公司,沈阳 110000
  • 收稿日期:2024-06-25 出版日期:2026-01-01 发布日期:2026-02-03
  • 作者简介:冯志刚(1980-),男,教授,博士.研究方向:自确认传感器技术,故障诊断.E-mail: fzg1023@yeah.net
  • 基金资助:
    国家自然科学基金项目(51605309)

Rolling bearing fault diagnosis based on multi-band feature map and improved SqueezeNet

Zhi-gang FENG1(),Meng-yuan REN1,Bing DONG2,Ming-yue YU1   

  1. 1.School of Automation,Shenyang Aerospace University,Shenyang 110136,China
    2.Aircraft Industry(Group) Co. ,Ltd. ,Shenyang 110000,China
  • Received:2024-06-25 Online:2026-01-01 Published:2026-02-03

摘要:

针对目前基于深度学习的故障诊断方法普遍存在模型参数量大和诊断时间长、在噪声环境下诊断性能也会大打折扣的问题,提出了一种快速、轻量的智能化诊断模型进行滚动轴承故障诊断。首先,利用鱼鹰优化算法(OOA)优化变分模态分解(VMD)的参数,进而基于固有模态函数(IMF)分量设计一种多频带灰度特征图;然后,基于有效注意力通道(ECA)模块设计一种残差注意力机制(RAM)模块,并集成到SqueezeNet模型中;最后,使用K最近邻(KNN)代替Softmax函数对故障进行识别与分类,建立了RSqueezeNet-KNN模型。两组实验结果表明:在噪声环境下,该模型对比其他方法能够实现轻量化应用,具有优秀的诊断性能。

关键词: 轴承故障诊断, 灰度特征图, SqueezeNet模型, 注意力机制, 轻量化

Abstract:

At present, fault diagnosis methods based on deep learning generally have the problems of large model parameters and long diagnosis times, and the diagnostic performance will be greatly reduced in noisy environments. This paper proposes a fast and lightweight intelligent diagnosis model for rolling bearing fault diagnosis. Firstly, the parameters of the variational mode decomposition (VMD) are optimized using the osprey optimization algorithm (OOA) to design a unique multi-frequency band grayscale feature map based on the intrinsic mode function (IMF) component. Then a residual attention mechanism module (RAM) is designed based on the efficient channel attention (ECA) module, which is integrated into the SqueezeNet model, and the K-nearest neighbor (KNN) method is used instead of the Softmax function to identify and classify the faults, and the RSqueezeNet-KNN model is established. Experimental results on two bearing datasets show that the model is able to achieve lightweight applications with excellent diagnostic performance compared to other methods in noisy environments.

Key words: bearing fault diagnosis, grayscale feature map, SqueezeNet model, attention mechanism, light-weighting

中图分类号: 

  • TH17

图1

SqueezeNet模型结构图"

图2

Fire模型结构图"

图3

ECA模块结构图"

图4

OOA-VMD灰度特征构造图"

图5

RAM模型结构图"

图6

RSqueezeNet-KNN模型的结构图"

图7

本文方法的流程图"

图8

CWRU实验装置原理图"

表1

CWRU轴承状态数据说明"

轴承状态直径/英寸标签数据类型样本数
正常Nor1 024200
滚动体故障0.007Ba11 024200
0.014Ba21 024200
0.021Ba31 024200
内圈故障0.007In11 024200
0.014In21 024200
0.021In31 024200
外圈故障0.007Ou11 024200
0.014Ou21 024200
0.021Ou31 024200

图9

OOA优化VMD迭代曲线"

图10

VMD 参数优化对比图"

表2

实验一中[K,α]最佳参数组合"

标签Kα
No172 000
Ba171 994
Ba261 999
Ba361 845
In171 991
In271 998
In371 996
Ou161 940
Ou272 000
Ou371 995

图11

VMD和OOA-VMD处理后Ba1的时域波形与频谱对比"

图12

实验一中10种状态类型的灰度特征图像"

表3

不同超参数组实验的正确率与训练时间"

超参数组合正确率/%训练时间/s
A99.01145.6
B99.15101.5
C99.0892.8
D99.43150.6
E99.7085.6
F99.5890.5
G96.02149.5
H95.10105.1
I88.7889.0

表4

不同比例的噪声标签的模型诊断结果"

模型标签噪声率(Label noisy rate, LNR)
0%2%5%10%
RSqueezeNet-KNN

100

±0

99.60

±0.27

99.35

±0.40

99.13

±0.4

RSqueezeNet

99.70

±0.21

99.20

±0.32

99.03

±0.41

98.80

±0.51

SqueezeNet

99.35

±0.4

99.13

±0.4

98.93

±0.53

98.80

±0.53

AlexNet

99.35

±0.49

99.16

±0.61

98.75

±0.88

96.53

±1.97

ResNet

98.70

±0.55

98.45

±0.47

98.33

±0.39

97.50

±0.77

WT-IResNet22

100

±0

99.59

±0.33

99.30

±0.32

98.66

±0.35

WT-ResNet22

99.23

±0.35

98.77

±0.32

97.74

±0.35

95.50

±0.33

表5

模型大小以及训练时间对比"

模型参数/MB训练时间/s
RSqueezeNet-KNN0.01585.849
RSqueezeNet0.01585.6
SqueezeNet0.03195.2
AlexNet24.723143.2
ResNet0.041121.7
WT-IResNet220.132661
WT-ResNet220.148278

图13

不同噪声标签下预测结果的混淆矩阵"

图14

实验一中噪声环境中诊断模型的性能比较"

图15

实验二中航空发动机转压气机转子试验装置实物图"

表6

航空发动机压气机转子测试仪轴承状态数据说明"

轴承状态标签数据长度样本数转速/(r·min-1
正常Norm1 0248001 500
滚动体故障Ball1 0248001 500
内圈故障Inner1 0248001 500
外圈故障Outer1 0248001 500

表7

实验二中[K,α]的最佳参数组合"

标签Kα
Norm71 999
Ball71 934
Inner71 991
Outer7945

图16

实验二中OOA-VMD处理后Ba1的时域波形与频谱"

图17

实验二中4种状态类型的灰度特征图像"

表8

实验二中不同比例的噪声标签的模型诊断结果"

模型标签噪声率/LNR
0%2%5%10%
RSqueezeNet-KNN

100

±0

99.97

±0.06

99.91

±0.12

99.89

±0.12

RSqueezeNet

99.95

±0.07

99.87

±0.14

99.84

±0.21

99.75

±0.27

SqueezeNet

99.94

±0.1

99.87

±0.09

98.83

±0.13

99.67

±0.32

AlexNet

99.94

±0.14

99.62

±0.14

99.47

±0.12

99.38

±0.21

ResNet

99.86

±0.08

99.72

±0.13

99.72

±0.13

99.63

±0.17

WT-IResNet22

100

±0

99.91

±0.08

99.91

±0.08

99.87

±0.13

WT-ResNet22

100

±0

99.89

±0.10

99.89

±0.10

99.82

±0.24

图18

实验二中噪声环境中诊断模型的性能比较"

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