干涉型光纤陀螺随机噪声的分析研究

Research on IFOG random noise

系统地分析了光纤陀螺所包含随机噪声的种类及其来源和特性,介绍了分析光纤陀螺随机噪声的工具———A llan方差法和国军标模型拟合法。对某型干涉型光纤陀螺的静态实验数据,分别应用上述2种分析方法,计算分析了光纤陀螺信号中的噪声分量。计算结果表明:试验所用的光纤陀螺输出的静态信号中含有量化噪声、角随机游走噪声、角速率随机游走噪声、零偏不稳定性和速率斜坡噪声,其中,角速率随机游走噪声、零偏不稳定性和速率斜坡噪声含量较大。该分析研究对光纤陀螺的研究有很好的应用价值。

The source and characteristic of fiber-optic gyroscope（FOG） random noise is analyzed in theory. Two methods of analyzing the FOG random noise, Allan cvariance method and model fitting method using in the military standard of PRC ,are introduced. And then the static data is used to calculate the noise contents in FOGg output by using these two methods. The result shows that the output signal contents quantization noise,angle random walk noise anglt,rate random walk noise, bias instability and rate ramp noise, among which the last three noises are more important. The mothod is very useful to research FOG.