Method for drawing axis trajectory diagram by using variational mode decomposition reconstruction signal

A technology of variational mode decomposition and axis trajectory, which is applied in character and pattern recognition, instrumentation, geometric CAD, etc., can solve the problems of insignificant high-frequency signal effect, noise interference, and low resolution, so as to avoid modal Effects of overlapping, reducing interference, and improving resolution

Pending Publication Date: 2022-04-15
南京凯奥思数据技术有限公司
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Problems solved by technology

Due to the multiple vibration sources and serious noise interference of the on-site rotating equipment, the traditional time-frequency analysis method has low resolution and has great limitations; the wavelet transform (WT) has a better resolution and can distinguish the time-frequency characteristics of the signal. and improve the characteristics of time-frequency multi-resolution, but the wavelet transform only decomposes low-frequency signals, and the effect is not obvious for high-frequency signals; Empirical Mode Decomposition (EMD) is an adaptive signal analysis method tha

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  • Method for drawing axis trajectory diagram by using variational mode decomposition reconstruction signal
  • Method for drawing axis trajectory diagram by using variational mode decomposition reconstruction signal
  • Method for drawing axis trajectory diagram by using variational mode decomposition reconstruction signal

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[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] figure 1 It is a flow chart of the analysis method of the present invention, and the method for drawing the axis locus diagram using the variational mode decomposition reconstruction signal specifically includes the following steps:

[0026] S1. Obtain the original displacement signals of the rotating device in two mutually perpendicular directions (X direction and Y direction) perpendicular to the axis plane and passing through the axis;

[0027] S2. Setting the initial eigenmode function component layers K=2;

[0028] S3. Carry out variational mode decomposition (i.e. VMD decomposition) to the original displacement signal in the X direction, calculate the information entropy of each layer intrinsic mode function component (i.e. IMF), and furt

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Abstract

The invention relates to the technical field of fault diagnosis of rotating mechanical equipment, and discloses a method for drawing an axis trajectory diagram by using a variational mode decomposition reconstruction signal, which comprises the following steps: determining the number of layers of a variational mode decomposition model through an information entropy mean value of an intrinsic mode function component, and reconstructing the signal by using the magnitude of correlation to obtain an axis trajectory diagram; and finally, an axis trajectory diagram of the reconstructed signal is made. The axis trajectory diagram obtained by the method can effectively reduce the noise in the original axis trajectory diagram, and improves the accuracy of subsequent fault diagnosis.

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Claims

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Application Information

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Owner 南京凯奥思数据技术有限公司
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