NEW STATISTICAL MOMENTS FOR DIAGNOSTICS OF ROLLING ELEMENT BEARINGS

Citation
F. Honarvar et Hr. Martin, NEW STATISTICAL MOMENTS FOR DIAGNOSTICS OF ROLLING ELEMENT BEARINGS, Journal of manufacturing science and engineering, 119(3), 1997, pp. 425-432
Citations number
31
Categorie Soggetti
Engineering, Mechanical","Engineering, Manufacturing
ISSN journal
10871357
Volume
119
Issue
3
Year of publication
1997
Pages
425 - 432
Database
ISI
SICI code
1087-1357(1997)119:3<425:NSMFDO>2.0.ZU;2-V
Abstract
Statistical moment analysis has proven to be a very effective techniqu e for diagnosis of rolling element bearings. The fourth normalized cen tral statistical moment, kurtosis, has been the major parameter in thi s method. In this paper it will be shown that the third normalized sta tistical moment can be as effective as kurtosis if the data is initial ly rectified. The advantage of this moment over the traditional kurtos is value is its lesser susceptibility to spurious vibrations, which is considered to be one of the shortcomings of higher statistical moment s including kurtosis. The sensitivity of this moment to changes of loa d and speed is also less than kurtosis. The proposed method can also b e applied to higher odd statistical moments.