China Mechanical Engineering ›› 2021, Vol. 32 ›› Issue (21): 2617-2624.DOI: 10.3969/j.issn.1004-132X.2021.21.011

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Rolling Bearing Fault Diagnosis Method Based on Enhanced Deep Auto-encoder Network

TONG Jinyu;LUO Jin;ZHENG Jinde   

  1. School of Mechanical Engineering,Anhui University of Technology,Maanshan,Anhui,243032
  • Online:2021-11-10 Published:2021-11-25

基于增强深度自编码网络的滚动轴承故障诊断方法

童靳于;罗金;郑近德   

  1. 安徽工业大学机械工程学院,马鞍山,243032
  • 通讯作者: 郑近德(通信作者),男,1986年生,副教授。研究方向为动态信号处理和机械故障诊断等。E-mail:lqdlzheng@126.com。
  • 作者简介:童靳于,女,1987年生,实验师。研究方向为设备状态监测与故障诊断、模式识别。E-mail:pantc2006@163.com。
  • 基金资助:
    国家重点研发计划(2017YFC0805100);
    国家自然科学基金(51975004);
    安徽省高校自然科学研究重点项目(KJ2019053, KJ2019092);
    安徽理工大学矿山智能装备与技术安徽省重点实验室开放基金(201902005)

Abstract: To improve the feature mining capabilities of deep auto-encoder networks and select the network hyperparameters adaptively, an enhanced deep auto-encoder network was proposed for rolling bearing fault diagnosis. Maximum correlation entropy was used to replace mean square error as the loss function of auto-encoder. Sparse penalty term and contractive penalty term embedded with non-negative constraints were added to further reduce the reconstruction errors. Key parameters of the network were adaptively selected through gray wolf optimization algorithm. After experimental analyses, results show that compared with the existing methods, the proposed method has stronger feature extraction ability and stability. For bearing vibration data under variable operating conditions, the proposed method may also achieve high recognition accuracy.

Key words: rolling bearing, fault diagnosis, auto-encoder network, deep learning

摘要: 为了提高深度自编码网络的特征挖掘能力,自适应地选取网络超参数,提出了一种增强深度自编码网络,并将其应用于滚动轴承故障诊断。采用最大相关熵代替均方误差作为自编码器的损失函数,加入稀疏惩罚项和嵌入非负约束因子的收缩惩罚项,进一步减小重构误差;通过灰狼优化算法自适应地选取网络关键参数。实验分析结果表明,与现有方法相比,该方法具有更强的特征提取能力与稳定性,对变工况下的轴承振动数据也能达到较高的识别精度。

关键词: 滚动轴承, 故障诊断, 自编码网络, 深度学习

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