An Improved Fault Diagnosis Method of Limit Learning Machine Based on Information Reconstruction

A technology of extreme learning machine and fault diagnosis, which is applied in computer parts, instruments, character and pattern recognition, etc.

Inactive Publication Date: 2019-02-01
LIAONING UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are many deficiencies that cannot be avoided in the training process of the model in the prior art

Method used

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  • An Improved Fault Diagnosis Method of Limit Learning Machine Based on Information Reconstruction
  • An Improved Fault Diagnosis Method of Limit Learning Machine Based on Information Reconstruction
  • An Improved Fault Diagnosis Method of Limit Learning Machine Based on Information Reconstruction

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Embodiment Construction

[0044] The improved extreme learning machine fault diagnosis method for information reconstruction is characterized in that the steps are as follows:

[0045] 1) Acquisition signal: collect bearing data, according to the inner ring, outer ring, ball and normal state (not very smooth, the meaning expression is not clear, and needs to be modified).

[0046] 2) Signal processing: Decompose the signal through the empirical mode decomposition method to decompose multiple intrinsic mode components, and each mode component is detected by the proposed weighted permutation entropy to filter out noise and reconstruct the original Some single-frequency signal sequences;

[0047] The calculation method of weighted permutation entropy is as follows:

[0048] The formula for weighted permutation entropy is as follows:

[0049]

[0050] In the formula: m ij Indicates the evaluation value of item i under the j index, and this formula calculates the weight of the entropy value i under th...

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Abstract

The invention relates to an improved fault diagnosis method of a limit learning machine based on information reconstruction, which comprises the following steps: 1) collecting signals; 2) signal processing; 3) feature extraction; 4) division of fault diagnosis; the invention is based on the permutation entropy (PE) thought, and proposes the weighted permutation entropy (WPE) thought. By weightingthe entropy characteristic of the common permutation entropy, the characteristic information becomes more sensitive, the change of the characteristic information can be well presented, and the foundation for the characteristic selection is provided. In addition, a new method based on Filter-Wrapper (filter-package) method discriminates the features effectively, minimizes the error by constantly adjusting the output weight of the network, minimizes the error of the output result of the limit learning machine, and compares the result with the result of the traditional limit learning machine, thereby verifying the effectiveness of the invention.

Description

technical field [0001] The invention relates to an improved extreme learning machine fault diagnosis method for information reconstruction, which belongs to the technical field of rolling bearing fault diagnosis and prevention. Background technique [0002] Bearings have always been a vital component in large mechanical equipment, and their operating status has a huge impact on the entire mechanical equipment. Moreover, the failure of rolling bearings often occurs in the failure of rotating machinery equipment. According to incomplete statistics, about 30% of all large-scale mechanical accidents and disasters are caused by mechanical failures. Among them, nearly 60% to 70% are caused by a series of various equipment damages due to bearing failure. The reason is that mechanical equipment is often affected by harsh working conditions, and mechanical equipment often has to undertake high-load work, so fault diagnosis for rolling bearings has always been a research hotspot in f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/214G06F18/24
Inventor 张利郭炜儒张皓博高欣邱存月周佳宁王军
Owner LIAONING UNIVERSITY
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