摘要
针对实际捷联系统中三轴干涉式光纤陀螺仪各轴之间的精度及稳定性不对称问题,提出将Loyt消偏器引入到三轴陀螺光路系统中,新光路结构使每轴陀螺均输入相同的极低偏振度自然光,保证了各轴陀螺的对称性。利用琼斯矩阵与干涉矩阵建立了该结构光纤陀螺的系统模型,并应用此模型对该陀螺的输出及零点偏移情况进行了仿真分析。结果表明,该光路在保持各轴光路高度对称的同时还提高了陀螺系统的精度与稳定性,并在一定程度上降低了对光源偏振度的要求。
Aiming at the accuracy and stability problems of the tri-axial interferometric fiber optic gyroscope （IF- OG） in the strap down system, Fiber Lyot Depolarizer was introduced in the light path system. Thus each of the ax- is gyroscopes in the new structure obtained the same polarization natural light to ensure the symmetry of axis gyro- scopes. Using Jones matrix and coherence matrix, the model of interferometric fiber optic gyroscope system was es- tablished for the simulation analysis of the zero drift＇s output. It was obvious that the light path system could main- tain high degree symmetry to improve the accuracy and the stability of the gyroscope system with the lower request to the polarization of the light.
出处
《压电与声光》
CAS
CSCD
北大核心
2010年第2期219-222,225,共5页
Piezoelectrics & Acoustooptics
基金
国防科工委基础研究基金资助项目(51409040103CB0106)
关键词
三轴光纤陀螺
消偏
对称性
零漂
triaxial fiber optic gyroscope
depolarization
symmetry
zero drift
