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A Feature Extraction Method for Early Damage State of Rolling Bearings

A rolling bearing and feature extraction technology is applied in the field of feature extraction of the early damage state of rolling bearings, which can solve the problems of difficult bearing early damage state diagnosis, inability to effectively extract bearing early damage vibration signal feature information, etc., and achieve reliable judgment basis, algorithm and program. Easy, accurate and effective effects

Active Publication Date: 2021-11-09
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0003] Aiming at the deficiencies pointed out in the above-mentioned background technology, the present invention provides a feature extraction method for the early damage state of rolling bearings, which aims to solve the problem that the existing rolling bearing damage diagnosis methods in the above-mentioned background technology cannot effectively extract the feature information in the early damage vibration signal of the bearing , it is difficult to timely diagnose the early damage state of the bearing

Method used

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  • A Feature Extraction Method for Early Damage State of Rolling Bearings
  • A Feature Extraction Method for Early Damage State of Rolling Bearings
  • A Feature Extraction Method for Early Damage State of Rolling Bearings

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Embodiment Construction

[0059] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0060] The device of the present invention for feature extraction of early damage state of rolling bearings is as follows: figure 1 As shown, it includes the motor 1 set on the base 3 and the support base for installing the chemical centrifugal pump 6. The output shaft of the motor 1 is connected to the rotating shaft 5 through the coupling 2, and the rotating shaft 5 is set on the support base through the rolling bearing 4. Above, a chemical centrifugal pump 6 is installed on the rotating shaft 5, a vibration acceleration sensor 7 is arranged on the rolling bearing 4, the vibration acceleration se...

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Abstract

The invention discloses a feature extraction method for the early damage state of a rolling bearing. Firstly, the bias amount of the early damage signal of the rolling bearing is removed, and the variational mode decomposition method is used to perform adaptive decomposition processing on the vibration signal of the early damage state of the rolling bearing without bias. The eigenmode components are obtained, and then two time-domain characteristics of vibration energy and vibration kurtosis are calculated for each eigenmode component, and the initial characteristic data set of the early damage state of the rolling bearing is constructed using the time-domain characteristics, and then through the principal component analysis method The feature dimensionality reduction is performed on the initial feature set, and then a low-dimensional and efficient feature vector is obtained, which realizes the effective extraction of the feature information of the early damage state of the rolling bearing. The algorithm and program of the feature extraction method of the early damage state of the rolling bearing provided by the present invention are easy to implement, the whole process does not require manual participation, the degree of automation and intelligence is high, the cost is low, the accuracy is high, and it is easy to operate and implement, which is the safe operation of the bearing and equipment. Provides a reliable basis for judgment.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis and signal processing and analysis, and in particular relates to a feature extraction method for the early damage state of a rolling bearing. Background technique [0002] Rolling bearings are widely used in mechanical equipment in many fields such as electric power, metallurgy, petrochemical, transportation, etc. due to their advantages of high running accuracy, small friction coefficient, easy lubrication, easy assembly and mass production. Rolling bearings play a very important role in the stability, safety and reliability of mechanical equipment. Therefore, monitoring and diagnosing its damage state, especially the early damage state, can effectively reduce the probability of equipment failure, which will improve the production efficiency of enterprises and ensure Production safety is of great significance. At present, the monitoring and diagnosis of the damage state of rolling bearin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/045G06K9/62G06K9/00G06F17/11
CPCG01M13/045G06F17/11G06F2218/02G06F18/2135
Inventor 邓林峰张爱华郑玉巧赵荣珍
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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