激光技术, 2011, 35 (3): 299, 网络出版: 2011-05-13
基于经验模态分解的激光干涉信号处理
Laser interferometer signal processing based on empirical mode decomposition
傅里叶光学与光信号处理 小波脊优化 经验模态分解 全光纤位移干涉系统 连续小波变换 Fourier optics and optical signal processing wavelet ridge optimization empirical mode decomposition all-fiber displacement interferometer system for a continuous wavelet transform
摘要
为了去除激光干涉测速系统提取的小波脊的大量高频噪声,提高系统测量精度,采用一种基于经验模态分解的小波脊优化的方法,对高频噪声强度进行了很好的抑制,测量误差为原来未优化误差的42.3%,较大幅度提高了激光干涉测速系统的测量精度。结果表明,该方法对经过时频分析的信号去噪有重要的实用价值。
Abstract
In order to suppress the high-frequency noise contained in the wavelet ridge obtained from the laser interference velocity measurement system and improve the system accuracy, a method based on empirical mode decomposition was proposed . Theoretical analysis and experimental results show that this method can significantly suppress the high-frequency noise. The measurement error is 42.3% of the original one before optimization. This method improves the system accuracy of the all-fiber displacement interferometer system for any reflector and it is applicable in signal denoising in time-frequency analysis.
蒲亮, 叶玉堂, 吴云峰, 王昱琳, 刘莉. 基于经验模态分解的激光干涉信号处理[J]. 激光技术, 2011, 35(3): 299. PU Liang, YE Yu-tang, WU Yun-feng, WANG Yu-lin, LIU Li. Laser interferometer signal processing based on empirical mode decomposition[J]. Laser Technology, 2011, 35(3): 299.