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TECHNICAL BRIEFS

Bearing Localized Defect Detection by Bicoherence Analysis of Vibrations

[+] Author and Article Information
C. James Li

Department of Mechanical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180

J. Ma

Department of Mechanical Engineering, New York Institute of Technology, Old Westbury, NY 11568

B. Hwang

Information Technology Office, Naval Surface Warfare Center, Bethesda, MD 20084

J. Eng. Ind 117(4), 625-629 (Nov 01, 1995) (5 pages) doi:10.1115/1.2803542 History: Received March 01, 1992; Revised September 01, 1994; Online January 17, 2008

Abstract

For automatic detection and diagnosis of localized defects in rolling element bearings, bicoherence spectra are used to derive features that signify the condition of a bearing. These features quantitatively describe the degree of phase correlation among any three harmonics of bearing characteristic defect frequencies. In this paper, theory of bicoherence is explored to establish its utilization in the detection of bearing localized defects. Experimental results show that the proposed method is effective in bearing defect detection and sensitive to incipient defects.

Copyright © 1995 by The American Society of Mechanical Engineers
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