|Table of Contents|

Gearbox fault diagnosis method based on convergent trend-guided variational mode decomposition(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2022年01期
Page:
177-189
Research Field:
载运工具运用工程
Publishing date:

Info

Title:
Gearbox fault diagnosis method based on convergent trend-guided variational mode decomposition
Author(s):
JIANG Xing-xing1; 2;  SONG Qiu-yu1;  ZHU Zhong-kui1;  HUANG Wei-guo1;  LIU Jie3
(1. School of Rail Transportation, Soochow University, Suzhou 215131, Jiangsu, China; 2. Key Laboratory of Transportation Industry for Transport Vehicle Detection, Diagnosis and Maintenance Technology,Shandong Jiaotong University, Jinan 250357, Shandong, China; 3. School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China)
Keywords:
gearbox;  fault diagnosis;  variational mode decomposition;  center frequency;  convergent trend;  sparse code shrinkage
PACS:
U270
DOI:
10.19818/j.cnki.1671-1637.2022.01.015
Abstract:
From the perspective of the center frequency, the decomposition characteristics of different initial center frequencies in the variational mode decomposition algorithm were deeply analyzed. Making use of the decomposition characteristics, the initial center frequencies used in the variational mode decomposition were reasonably updated, without the prior knowledge, the entire analysis frequency band of the signal was adaptively decomposed. According to the kurtosis criterion, the fault component with the most abundant fault information was selected from the decomposed sub-signals. Envelope analysis was performed on the optimal fault component which has been processed by the balance parameter optimization and sparse code shrinkage. Based on the decomposition characteristics of variational mode, a complete gearbox fault diagnosis method was constructed based on the convergent trend-guided variational mode decomposition, and the diagnosis method was applied to the early local damage fault identification of gears in automobile transmission gearboxes and fault diagnosis of gearboxes in contact fatigue testing machines. Research results show that there is a convergent trend phenomenon in the variational mode decomposition algorithm. With the gradual increase of the initial center frequency, the convergent center frequency of the extracted mode has a specific convergent relationship with its corresponding initial center frequency. The proposed method can decompose the vibration signal adaptively without the prior knowledge of parameters. In experiment 1, the kurtosis of the fault component obtained by the proposed method is 3.056, and the kurtosis of the fault component after optimization is 24.812. The maximum kurtosis of the fault component in the traditional variational mode decomposition with two different ways for initializing the center frequency is 2.830 and 2.421, respectively. The fast spectral kurtosis analysis method fails to extract the fault component. In experiment 2, the kurtosis of fault component obtained by the proposed method is 3.467, and the kurtosis of the fault component after optimization is 19.780. The maximum kurtosis of the fault component in the traditional variational mode decomposition with two different ways for initializing the center frequency is 3.231 and 3.361, respectively. The fast spectral kurtosis analysis method fails to extract the fault components. The proposed method can enhance the transient characteristics and fault characteristic frequencies, and is more accurate and superior in the gearbox fault diagnosis. 22 figs, 30 refs.

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Last Update: 2022-03-20