基于Allan方差的激光陀螺信号分析

Analysis of laser gyroscope signal based on Allan variance

本文分析了激光陀螺的随机噪声的产生来源,同时分析了噪声里的量化噪声、角度随机游走、零偏不稳定性、速率随机游走、速率斜坡噪声。在利用Allan方差对激光陀螺仪输出信号进行分析基础之上,设计了IIR滤波系统对陀螺信号进行处理,并对滤波前后的陀螺测试数据进行了对比,结果表明,该滤波技术能有效提高激光陀螺的精度。

The source of random errors of laser gyro is analyzed in this paper.For 5 main noise,the Allan variance method is used to make a characteristic analysis and calculation of the signal of laser gyro.Gyro signal is filtered by IIR digital filter,and the gyro data before and after filtering are analysed by Allan variance.The result indicates that this method can effectively improve the accuracy laser gyro.