Study on the Contrast between Local Characteristic-scale Decomposition and Local Mean Decomposition

Cui Weicheng; Li Wei; Meng Fanlei; Liu Linmi

doi:10.16578/j.issn.1004.2539.2017.04.003

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Study on the Contrast between Local Characteristic-scale Decomposition and Local Mean Decomposition

更新时间：2022-10-20

- Study on the Contrast between Local Characteristic-scale Decomposition and Local Mean Decomposition
- Vol. 41, Issue 4, Pages: 10-14(2017)
- 作者机构：
  
  1. 海军航空工程学院飞行器工程系
- 作者简介：
- 基金信息：
- DOI：10.16578/j.issn.1004.2539.2017.04.003
  CLC：
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[1]崔伟成,李伟,孟凡磊,刘林密.局部特征尺度分解与局部均值分解的对比研究[J].机械传动,2017,41(04):10-14+18.

Cui Weicheng, Li Wei, Meng Fanlei, et al. Study on the Contrast between Local Characteristic-scale Decomposition and Local Mean Decomposition. [J]. 41(4):10-14(2017)
[1]崔伟成,李伟,孟凡磊,刘林密.局部特征尺度分解与局部均值分解的对比研究[J].机械传动,2017,41(04):10-14+18. DOI： 10.16578/j.issn.1004.2539.2017.04.003.

Cui Weicheng, Li Wei, Meng Fanlei, et al. Study on the Contrast between Local Characteristic-scale Decomposition and Local Mean Decomposition. [J]. 41(4):10-14(2017) DOI： 10.16578/j.issn.1004.2539.2017.04.003.

摘要

局部特征尺度分解与局部均值分解是两种优异的自适应分解方法,在旋转机械故障诊断领域应用十分广泛,为了对比两者的计算流程及性能的差异,针对均值曲线的获取及分解的终止条件进行了对比研究;指出局部均值分解方法在均值点定义、插值方法及纯调频准则等方面存在不足。通过仿真信号和轴承内圈故障振动信号分析,验证了局部特征尺度分解较局部均值分解优越,但后者的部分思想也可以供前者借鉴。

Abstract

The Local Characteristic-scale Decomposition（ LCD） and the Local Mean Decomposition（ LMD） are two kinds of effective adaptive time-frequency analysis methods which widely used in the field of rotating machinery fault diagnosis. In order to compare the difference of calculation process and the performance of them,aiming at the acquiring of mean curve and decomposition termination conditions,the comparative research are carried out. The deficiencies of LMD in the mean point definition,interpolation method and pure frequency modulation standards are pointed out. Through the simulation signal and the bearing inner ring fault vibration signal analysis,the superiority of LCD is verified,but the part of the mind of LMD can also provide reference for the LCD.

关键词

局部特征尺度分解局部均值分解均值点均值曲线插值

Keywords

Local characteristic-scale decompositionLocal mean decompositionMean pointMean carveInterpolation

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