Restrain Boundary Effect of EMD Based on Least Square Fitting

Authors

Zhenpeng He, 1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, civil aviation university of China, Tianjin 300300, China;;2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Zhiqi Zhu, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Haichao Xie, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Yawen Wang, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Zongqiang Li, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
He Rui, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Chaoping Du, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;
Jinlan Li, 2.Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China;

Abstract

Abstract: To improve the accuracy of mechanical fault diagnosis, it’s meaningful to do research on the boundary effect of EMD. In this article, least squares linear method is applied to extend local extremum points at the end of a data series, which judges that whether the maximum value is within the wave fluctuation range of the original signal maximum points, whether the minimum value is within the wave fluctuation range of the original signal minimum points. It compares the extended extreme points and endpoint values, so the best signal endpoint is obtained. By calculating the value of similarity coefficient and decomposition error, the results of simulation analysis and tests of fault diagnosis of rolling bearings show that the developed EMD method can depress the boundary effect compared with parallel extending method, extrema shift method and mirror periodic.

Recommended Citation

He, Zhenpeng; Zhu, Zhiqi; Xie, Haichao; Wang, Yawen; Li, Zongqiang; Rui, He; Du, Chaoping; and Li, Jinlan (2019) "Restrain Boundary Effect of EMD Based on Least Square Fitting," Journal of System Simulation: Vol. 30: Iss. 9, Article 19.
DOI: 10.16182/j.issn1004731x.joss.201809019
Available at: https://dc-china-simulation.researchcommons.org/journal/vol30/iss9/19

First Page

3377

DOI Link

https://doi.org/10.16182/j.issn1004731x.joss.201809019

Last Page

3385

CLC

TK422

Recommended Citation

He Zhenpeng, Zhu Zhiqi, Xie Haichao, Wang Yawen, Li Zongqiang, He Rui, Du Chaoping, Li Jinlan. Restrain Boundary Effect of EMD Based on Least Square Fitting[J]. Journal of System Simulation, 2018, 30(9): 3377-3385.

DOI

10.16182/j.issn1004731x.joss.201809019