A SINGULAR INTERVAL RECONSTRUCTION LOCAL MEAN DECOMPOSITION AND ITS APPLICATION IN BEARING FAULT DIAGNOSIS OF RECIPROCATING COMPRESSOR (MT)

ZHAO HaiYang; LI Xue; LIU ZuJian; WANG JinDong; FENG Shuai

doi:10.16579/j.issn.1001.9669.2023.03.003

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A SINGULAR INTERVAL RECONSTRUCTION LOCAL MEAN DECOMPOSITION AND ITS APPLICATION IN BEARING FAULT DIAGNOSIS OF RECIPROCATING COMPRESSOR (MT)

更新时间：2023-08-01

- A SINGULAR INTERVAL RECONSTRUCTION LOCAL MEAN DECOMPOSITION AND ITS APPLICATION IN BEARING FAULT DIAGNOSIS OF RECIPROCATING COMPRESSOR (MT)
- Journal of Mechanical Strength Issue 3, Pages: 527-533(2023)
- 作者机构：
  
  1. 东北石油大学机械科学与工程学院
  2. 山东丰汇设备技术有限公司
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2023.03.003
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ZHAO HaiYang, LI Xue, LIU ZuJian, et al. A SINGULAR INTERVAL RECONSTRUCTION LOCAL MEAN DECOMPOSITION AND ITS APPLICATION IN BEARING FAULT DIAGNOSIS OF RECIPROCATING COMPRESSOR (MT). [J]. Journal of Mechanical Strength (3):527-533(2023)
DOI：

ZHAO HaiYang, LI Xue, LIU ZuJian, et al. A SINGULAR INTERVAL RECONSTRUCTION LOCAL MEAN DECOMPOSITION AND ITS APPLICATION IN BEARING FAULT DIAGNOSIS OF RECIPROCATING COMPRESSOR (MT). [J]. Journal of Mechanical Strength (3):527-533(2023) DOI： 10.16579/j.issn.1001.9669.2023.03.003.

摘要

针对包络估计函数解调时出现的突变问题，提出奇异区间包络重构局部均值分解(Singular Interval Reconstruction Local Mean Decomposition, SIRLMD)方法。确定包络估计函数解调突变原因为包络线存在交叉，为此定义交叉局部区域为奇异区间，结合极值对称理论增广该区间插值点，应用三次埃尔米特插值进行局部重构，形成奇异区间包络重构算法。仿真信号和往复压缩机轴承故障诊断应用证明，该算法解决了包络线交叉问题，抑制了解调突变现象，分解结果故障特征更显著。

Abstract

Aiming at the mutation in demodulation of the envelope estimation function, a local mean decomposition method for singular interval envelope reconstruction is proposed. This method determines that the reason for the sudden change in the demodulation of the envelope estimation function is the intersection of the envelopes, and defines the local area where the intersection exists as a singular interval. Combined with the extreme value symmetry theory, the interpolation points in this interval are expanded, and the cubic Hermitian interpolation is used to perform local reconstruction. A singular interval envelope reconstruction algorithm is formed. The simulation signal and the application of fault diagnosis of reciprocating compressor bearing prove that the proposed method solves the envelope crossing problem, suppresses the demodulation mutation phenomenon, and the decomposition result has more obvious fault characteristics.

关键词

LMD包络重构解调突变往复式压缩机故障诊断

Keywords

LMD envelope reconstructionMutation in demodulationReciprocating compressorFault diagnosis

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