摘要
介绍了Gabor变换的基本理论,提出了一种基于Gabor变换的降噪方法。该方法首先对信号进行Gabor变换,并选择合适的阈值对Gabor展开系数进行处理,然后对处理后的Gabor展开系数进行Gabor逆变换,从而实现降噪。仿真结果表明,该方法具有很好的降噪效果,为机械故障诊断提供了一种新的思路。
The theory of the Gabor transform is introduced and a de-noising method based on the Gabor transform is proposed. At first, the Gabor transform is applied to the signal and the Gabor expansion coefficients are processed by the appropriate threshold valve. Then the de-noised, signal is obtained by the Gabor inverse transform. The simulated results indicate that this method has good de-noising effect, and can provide a new means for mechanical diagnosis.
基金
国家自然科学基金(10602038)
教育部科学技术研究重点项目(209013)
