光纤陀螺振动和变温条件下的DAVAR分析

李冀辰; 高凤岐; 王广龙; 高伟伟; 朱文杰; 汪明

doi:doi:10.3788/cjl201340.0908004

中国激光, 2013, 40 (9): 0908004, 网络出版: 2013-08-15

光纤陀螺振动和变温条件下的DAVAR分析

Analysis of Dynamic Allan Variance for Fiber Optic Gyro under Vibration and Variable Temperature Conditions

论文大纲

李冀辰 ^*高凤岐王广龙高伟伟朱文杰汪明

作者单位

军械工程学院纳米技术与微系统实验室, 河北石家庄 050003

测量动态Allan方差光纤陀螺振动温度 measurement dynamic Allan variance fiber optic gyro vibration temperature

摘要

为了更好地分析光纤陀螺在动态环境下的性能，提出了采用动态Allan方差(DAVAR)的方法全面表征光纤陀螺的动态特性。DAVAR是一种最新提出来分析非平稳信号的方法，是Allan方差法的扩展和完善。针对高精度光纤陀螺进行分析，分别在振动和变温条件下获得实测数据，采用DAVAR计算每个样本的Allan方差，并求得五个噪声系数的二维表示，用来细化和辨识信号动态特征。实验结果表明，DAVAR法可以量化地分析光纤陀螺输出信号中各项噪声系数在动态环境下的变化情况，准确地反映陀螺的动态特性。采用DAVAR分析光纤陀螺信号，可为之后的噪声滤除提供理论支撑和实验依据。

Abstract

Allan variance method is an effective tool for the analysis of the fiber optic gyro (FOG) static noise, but it only applies to stationary signals and can′t reflect the dynamic characteristics of FOG. In order to comprehensively study on FOG random error, dynamic Allan variance (DAVAR) is used to analyse the high precision FOG. The mathematical foundations of the DAVAR are presented and discussed, and the measured data under vibration and variable temperature conditions are obtained respectively, and the noise of which is calculated through DAVAR, its effectiveness is shown by performing extensive numerical analyses on simulated and experimental data. Experimental results show that the DAVAR analysis method can not only determine the proportion of the various noise factors, but also identify and refine the FOG noise in mutation environment, and the Allan variances are visually reflected in a 3D graph. The results prove the validity and the effectiveness of the proposed new tool.

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李冀辰, 高凤岐, 王广龙, 高伟伟, 朱文杰, 汪明. 光纤陀螺振动和变温条件下的DAVAR分析[J]. 中国激光, 2013, 40(9): 0908004. Li Jichen, Gao Fengqi, Wang Guanglong, Gao Weiwei, Zhu Wenjie, Wang Ming. Analysis of Dynamic Allan Variance for Fiber Optic Gyro under Vibration and Variable Temperature Conditions[J]. Chinese Journal of Lasers, 2013, 40(9): 0908004.

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