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HIGHER ORDER SPECTRAL ANALYSIS IN FAULT DIAGNOSIS OF ROTORS

HIGHER ORDER SPECTRAL ANALYSIS IN FAULT DIAGNOSIS OF ROTORS

作     者:Yang Jiangtian Xu Jinwu School of Mechanical Engineering, Beijing University of Sicence and Technology 

作者机构:北京科技大学机械工程学院 北京 

出 版 物:《Chinese Journal of Mechanical Engineering》 (中国机械工程学报(英文版))

年 卷 期:2001年第14卷第1期

页      面:40-44页

核心收录:

学科分类:08[工学] 080203[工学-机械设计及理论] 0802[工学-机械工程] 

主  题:Rotor Fault diagnosis Quadratic phase coupling Higher order spectra Bicoherence spectrum 

摘      要:The nonlinear properties of rotating machinery vibration signals are presented. The relationship between faults and quadratic phase coupling is discussed. The mechanism that gives rise to quadratic phase coupling is analyzed, and the coupling models are summarized. As a result, higher order spectra analysis is introduced into fault diagnosis of rotors. A brief review of the properties of higher order spectra is presented. Furthermore, the bicoherence spectrum is employed to extract the features that signify the machinery condition. Experiments show that bicoherence spectrum patterns of different faults are quite different, so it is proposed to identify the faults in rotors.

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