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Research on variational mode decomposition and its application in detecting rub-impact fault of the rotor system

机译：变模分解及其在转子系统碰摩故障检测中的应用

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摘要

Multi-component extraction is an available method for vibration signal analysis of rotary machinery, so a novel method of rubbing fault diagnosis based on variational mode decomposition (VMD) is proposed. VMD is a newly developed technique for adaptive signal decomposition, which can non-recursively decompose a multi-component signal into a number of quasi-orthogonal intrinsic mode functions. The equivalent filtering characteristics of VMD are investigated, and the behavior of wavelet packet-like expansion is first found based on fractional Gaussian noise via numerical simulations. VMD is then applied to detect multiple rubbing-caused signatures for rotor-stator fault diagnosis via numerical simulated response signal and practical vibration signal. A comparison has also been conducted to evaluate the effectiveness of identifying the rubbing-caused signatures by using VMD, empirical wavelet transform (EWT), EEMD and EMD. The analysis results of the rubbing signals show that the multiple features can be better extracted with the VMD, simultaneously.
机译：多分量提取是旋转机械振动信号分析的一种有效方法，因此提出了一种基于变模分解的摩擦故障诊断新方法。 VMD是用于自适应信号分解的新开发技术，它可以将多分量信号非递归地分解为多个准正交本征模式函数。研究了VMD的等效滤波特性，并通过数值模拟，首先基于分数高斯噪声发现了小波包状扩展的行为。然后，通过数值模拟响应信号和实际振动信号，将VMD应用于检测多个摩擦引起的特征，以进行转子定子故障诊断。还进行了比较，以评估使用VMD，经验小波变换（EWT），EEMD和EMD识别摩擦引起的签名的有效性。摩擦信号的分析结果表明，利用VMD可以更好地同时提取多个特征。

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  • 来源
    《Mechanical systems and signal processing》 |2015年第8期|243-251|共9页
  • 作者

    Yanxue Wang; Richard Markert; Jiawei Xiang; Weiguang Zheng;

  • 作者单位

    School of Mechanical Engineering, Guilin University of Electronic Technology, 541004 Guilin, PR China ,Strukturdynamik, Technische Universitaet Darmstadt, Otto-Bemdt-Strasse 2, 64287 Darmstadt, Germany;

    Strukturdynamik, Technische Universitaet Darmstadt, Otto-Bemdt-Strasse 2, 64287 Darmstadt, Germany;

    College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, PR China;

    School of Mechanical Engineering, Guilin University of Electronic Technology, 541004 Guilin, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Variational mode decomposition; Rubbing; Rotor; Demodulation; Impact;

    机译：变模分解;擦;转子解调;影响力;

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