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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 5    May 2017

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Assessment of bearing performance degradation via extension and EEMD combined approach
LIU Yu-mei(刘玉梅)1, ZHAO Cong-cong(赵聪聪)2, XIONG Ming-ye(熊明烨)3, ZHAO Ying-hui(赵颖慧)4,QIAO Ning-guo(乔宁国)1, TIAN Guang-dong(田广东)1

1. Transportation College, Jilin University, Changchun 130022, China;
2. College of Engineering and Technology, Jilin Agricultural University, Changchun 130118, China;
3. University of Illinois at Urbana-Champaign, Illinois, Champaign-Urbana 61801, USA;
4. Engineering Department, Changchun Visteon Faway Automotive Electronics Co., Ltd., Changchun 130011, China

Abstract:As a key component in rotating machinery, the operating reliability of bearing influences the performance and service life of the equipment directly. In order to describe bearing performance degradation (BPD) process effectively, an assessment approach combining extension and ensemble empirical mode decomposition (EEMD) was proposed. First, the extension was utilized to construct the matter-element of bearing operating state, and the energy moment of intrinsic mode functions (IMFs) was used as characteristic parameter of the matter-element. Then, to determine classical domains of characteristic parameters, the mathematical statistics method was adopted. Finally, the BPD was analyzed qualitatively and quantitatively according to the comprehensive correlation degree of bearing current operating state related to its healthy state. The analytic results of bearing test-rig show that the proposed method indicates the incipient fault approximately occurring in the 81st hour, and the method also quantitatively presents the degree of BPD. By contrast, the BPD assessment based on time-domain features extraction method could not achieve the above two results effectively.

 

Key words: bearing; performance degradation assessment; extension; ensemble empirical mode decomposition; mathematical statistics

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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