China Mechanical Engineering ›› 2013, Vol. 24 ›› Issue (4): 452-457.

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Application of Local Mean Decomposition and 1.5 Dimension Spectrum in Machinery Fault Diagnosis

  

  1. Zhong Xianyou1,2;Zeng Liangcai1;Zhao Chunhua2
    1.Education Ministry Key Laboratory of Metallurgical Equipment and Control,Wuhan University of Science and Technology,Wuhan,430081
    2.Hubei Key Laboratory of Hydroelectric Machinery Design & Maintenance,China Three Gorges University,Yichang,Hubei,443002
  • Online:2013-02-25 Published:2013-02-28
  • Supported by:
    National Natural Science Foundation of China(No. 51075234)

局域均值分解和1.5维谱在机械故障诊断中的应用

钟先友1,2;曾良才1;赵春华2   

  1. 1.武汉科技大学冶金装备及其控制教育部重点实验室,武汉,430081
    2.三峡大学水电机械设备设计与维护湖北省重点实验室,宜昌,443002
  • 基金资助:
    国家自然科学基金资助项目(51075234)
    National Natural Science Foundation of China(No. 51075234)

Abstract:

Aiming at nonlinear,non-stationary characteristics of a mechanical failure vibration signal,a mechanical fault diagnosis method combining  LMD and 1.5 dimensional spectrum was proposed.In this approach,LMD method was applied to decompose the original signals into a finite number of product functions(PFs),then the PFs containing fault information were analyzed with 1.5 dimension spectrum to extract the characteristics.This method was endowed with characteristics of suppressing Gaussian white noise,detecting the nonlinear coupling feature.The method was verified by simulation signals and engineering examples of mechanical fault diagnosis effectively.

Key words: local mean decomposition(LMD), 1.5 dimension spectrum, characteristic frequency, fault diagnosis

摘要:

针对机械故障振动信号的非线性、非平稳特征,提出了局域均值分解和1.5维谱相结合的机械故障诊断方法。该方法首先对信号进行局域均值分解,将其分解为若干个PF分量之和,然后运用1.5维谱方法对含有故障特征信息的PF分量进行特征提取。该方法具有抑制高斯白噪声、检测非线性耦合特征等特性。仿真信号与机械故障诊断工程实例的分析验证了该方法的有效性。

关键词: 局域均值分解, 1.5维谱, 特征频率, 故障诊断

CLC Number: