基于小波分析的FOG中1／f^γ噪声的去除方法研究  

Study on Eliminating 1/fγNoises From Fiber Optic Gyro Based on Wavelet Analysis

作　　者：张传斌[1] 王学孝[1] 邓正隆[1] 

机构地区：[1]哈尔滨工业大学航天学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2002年第4期64-66,共3页Systems Engineering and Electronics

摘　　要：在光纤陀螺中存在具有非平稳性、长程相关性、自相似性及具有 1/fγ 类型谱密度的分形噪声 ,采用传统的方法很难去除这类噪声。由于小波分析的多分辨分析特性 ,使之成为研究分形噪声的有力工具。在DJ小波非线性滤波的基础上 ,根据分形噪声在小波变换域的性质选择域值进行滤波。这种方法对去除光纤陀螺中的分形噪声简单有效 ,仿真结果进一步验证了这一点。In a fiber optic gyro, there exsit fractal noises characterized by nonstationarity, long term correlation, self similarity and 1/f*#\+γ *!spectral density with 1/f*#\+γ *!power law. It is difficult to eliminate fractal noises using traditional method. On account of the characteristics of the wavelet multi resolution analysis, wavelet analysis has become a powerful tool to study fractal noises. Based on the DJ nonliner filtering with wavelet, thresholds are chosen to perform filtering according to the properties of fractal noises in wavelet transform domain. This method is simple and efficient to eliminate fractal noises from a fiber optic gyro, which can be futher proven by simulation results.

关 键 词：小波分析 FOG 1/f^γ噪声 光纤陀螺 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]