基于改进胶囊网络的轴承复合故障诊断研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (20) : 69-76.

论文

基于改进胶囊网络的轴承复合故障诊断研究

袁洪芳1，张晓宁1，王华庆2

作者信息 +

Compound fault diagnosis of bearings based on an improved capsule network

YUAN Hongfang1 , ZHANG Xiaoning1 , WANG Huaqing2

Author information +

文章历史 +

摘要

滚动轴承的工作环境复杂，各个部位经常同时发生故障并相互影响，产生复合故障。传统的方法往往将复合故障视为单独的一类，难以识别其中包含的具体故障。针对这一问题，提出了一种基于胶囊网络和多标签分类的智能复合故障诊断方法。首先，将原始振动信号作为输入，通过卷积层和挤压激励模块实现特征提取。其次，初级胶囊层将提取的特征转换为向量，通过自注意路由算法传递到高级胶囊层。最后，通过多标签分类器得到诊断结果。经实验室数据验证，该方法在不同转速数据集上的准确率分别达到了98.70%、98.04%和94.72%，有效识别了复合故障。

Abstract

Due to the working condition of rolling bearings being complex, various parts often break down simultaneously and influence each other, resulting in compound fault. Traditional methods often regard the compound fault as an independent category, which makes it difficult to identify specific faults contained therein. To solve this problem, an intelligent method on the basis of capsule network and multi-label classification is proposed. First, original vibration signals are taken as input, and feature extraction is achieved by convolutional layers and the squeeze-and-excitation block. Second, the extracted features are converted into vectors through the primary capsule layer and then passed to the advanced capsule layer by the self-attention routing. Finally, the diagnosis results are obtained by a multi-label classifier. Validated by laboratory data, the accuracy reached 98.70%, 98.04%, and 94.72% under different speed conditions, effectively identifying the compound fault.

导出引用

袁洪芳1，张晓宁1，王华庆2. 基于改进胶囊网络的轴承复合故障诊断研究[J]. 振动与冲击, 2023, 42(20): 69-76

YUAN Hongfang1,ZHANG Xiaoning1,WANG Huaqing2. Compound fault diagnosis of bearings based on an improved capsule network[J]. Journal of Vibration and Shock, 2023, 42(20): 69-76

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