A Time-Frequency Filtering Method Based on Generalized S Transform and its Application in Machinery Fault Diagnosis
| Periodical | Applied Mechanics and Materials (Volumes 157 - 158) |
|---|---|
| Main Theme | Mechatronics and Applied Mechanics |
| Edited by | Jing Guo |
| Pages | 531-537 |
| DOI | 10.4028/www.scientific.net/AMM.157-158.531 |
| Citation | Xiu Wen Li et al., 2012, Applied Mechanics and Materials, 157-158, 531 |
| Online since | February, 2012 |
| Authors | Xiu Wen Li, Jian Hong Yang, Min Li, Jin Wu Xu |
| Keywords | Generalized S Transform, Machinery Fault Diagnosis, Time-Frequency Filtering |
| Price | US$ 28,- |
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 time-frequency 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.
