A time-frequency filtering method based on generalized S transform and its application in machinery fault diagnosis

摘要：

Aimed at the problem of low resolution and cross term interference of the traditional time-frequency analysis methods, a new time-frequency filtering method based on generalized S transform is proposed. The method is extended under the premise of the linearity, lossless invertibility, high timefrequency resolution of S transform. On the basis, a coefficient which is direct to the signal energy distribution is introduced. In this way, the resolution of the S transform can be adjust adaptively. Eventually, this method is applied to the time-frequency filtering. The results of simulation and faulty bearing show that the proposed methodology can achieve good effect of noise reduction, and be more suitable for the non-stationary characteristics of vibration signals.

关键词： machinery fault diagnosis time-frequency filtering generalized S transform

作者: Xiuwen Li Jianhong Yang Min Li Jinwu Xu

作者单位: School of Mechanical Engineering, University of Science and Technology Beijing,Beijing 100083, China

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Applied Mechanics(2011年机电一体化与应用力学国际会议 ICMAM 2011)

会议地点: 香港

会议语种:英文

页码: 531-537

在线出版日期: 2011-12-27（万方平台首次上网日期，不代表论文的发表时间）