基于小波分析的激光陀螺信号处理

RLG Signal Processing Based on Wavelet Analysis

随机噪声是影响激光陀螺精度的一个重要因素,其中随机噪声主要是白噪声。利用小波变换理论对激光陀螺数据进行消噪处理是小波的一个最基本的应用。选用Daubechies小波函数作为小波基,采用软阀值方法去除噪声。对某型号的激光陀螺的滤波结果表明了该方法的有效性。

Stochastic noises in ring laser gyro have poor effects on its' precision.Stochastic noises mainly contain white noises.In order to filter stochastic noise in ring laser gyro, two step are adopted. First, utilizing special properties of fractal noises in wavelet transform domain,parameter estimation technology in wavelet transform domain is applied to obtain parameters of noises.Second,wavelet soft-threshold denoising method is employed to eliminate noise.Filtering results of a certain type of ring laser gyro show that parameter estimation and filtering based on wavelet analysis are efficient.