Application of Higher-Order Cumulant in Fault Diagnosis of Rolling Bearing

4th Symposium on the Mechanics of Slender Structures

物理学;力学

Shen, Yongjun^1 ; Yang, Shaopu^1 ; Wang, Junfeng^1

Department of Mechanical Engineering, Shijiazhuang Railway Institute, Shijiazhuang 050043, China^1

关键词: Analytical signals;    Envelope analysis;    Fourth-order cumulants;    Freight locomotives;    Higher order cumulants;    Rolling bearings;    Second orders;    Vibration signal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/448/1/012008/pdf
DOI  :  10.1088/1742-6596/448/1/012008

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In this paper a new method of pattern recognition based on higher-order cumulant and envelope analysis is presented. The core of this new method is to construct analytical signals from the given signals and obtain the envelope signals firstly, then compute and compare the higher-order cumulants of the envelope signals. The higher-order cumulants could be used as a characteristic quantity to distinguish these given signals. As an example, this method is applied in fault diagnosis for 197726 rolling bearing of freight locomotive. The comparisons of the second-order, third-order and fourth-order cumulants of the envelope signals from different vibration signals of rolling bearing show this new method could discriminate the normal and two fault signals distinctly.