欢迎访问机床与液压官方网站!

咨询热线:020-32385312 32385313 RSS EMAIL-ALERT
基于EEMD-增强因子自适应的液压泵微弱故障特征提取
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

国家自然科学基金资助项目(51275524)


Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对斜盘式轴向柱塞泵微弱故障特征难以提取的问题,提出了一种基于EEMD-增强因子自适应的液压泵微弱故障特征提取方法。对故障信号EEMD分解得到一组IMFs,采用增强因子作为各IMF权值合成信号以突出故障特征并抑制不相关成分;对合成信号EEMD分解,用敏感因子筛选出最能够表征故障信息的IMFs分量重构信号;对重构信号做Hilbert变换求得包络谱,分析包络谱诊断出具体故障。仿真信号和液压泵实测信号的分析结果均很好地验证了该方法的有效性和优越性。

    Abstract:

    Aimed at the problem of difficult to extract the faint fault feature of axial plunger piston pump of inclined disk type, a method based on adaptive EEMD-enhancement factor was presented. Fault signals were decomposed into a group of intrinsic mode functions (IMFs) with ensemble empirical mode decomposition (EEMD), as to highlight the fault characteristic and inhibit unrelated elements by using the enhancement factor of IMF as its weight to synthetic signal. The synthetic signal was decomposed with EEMD operation, and the sensitive component was constructed with the IMFs which were the best represents of fault information as they were selected according to their sensitive factor. The envelope spectral of reconstructed signal was obtained by executing Hilbert transform to it, and the actual fault was diagnosed by the analysis of the gained envelope spectral. The validity and superiority of the method are demonstrated by the analysis results of simulation signal and the engineering measured data of hydraulic pump.

    参考文献
    相似文献
    引证文献
引用本文

王余奎,李洪儒,许葆华.基于EEMD-增强因子自适应的液压泵微弱故障特征提取[J].机床与液压,2014,42(19):185-190.
.[J]. Machine Tool & Hydraulics,2014,42(19):185-190

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2015-01-28
  • 出版日期: