调制电压幅值及噪声对谐振式光纤陀螺零偏稳定性的影响研究  

Research on the influence of modulation voltage amplitude and noise on the resonator fiber optic gyroscope′s bias stability

作　　者：高天香 李俊[2] 蓝士祺 吴凡[2] 岳亚洲[2] 齐新元 GAO Tianxiang;LI Jun;LAN Shiqi;WU Fan;YUE Yazhou;QI Xinyuan(School of Physics,Northwest University,Xi'an,Shaanxi 710127,China;National Key Laboratory of Science and Technology on Aircraft Control,Flight Automatic Control Research Institute,Xi'an,Shaanxi 710076,China)

机构地区：[1]西北大学物理学院,陕西西安710127 [2]西安飞行自动控制研究所飞行器控制一体化技术国防科技重点实验室,陕西西安710076

出　　处：《光电子．激光》2023年第1期74-80,共7页Journal of Optoelectronics·Laser

基　　金：装备预研基金(61409230217)资助项目。

摘　　要：谐振环路背向散射噪声是谐振式光纤陀螺(resonator fiber optic gyroscope, RFOG)系统中的主要光学噪声之一。本文基于谐振环中背向散射噪声对陀螺输出误差影响的理论分析,对比不同调制波形和载波抑制路数的影响,得到最佳方案为三角波双路调制。基于该方案,建立陀螺零偏及零偏稳定性(bias stability, BS)误差与调制电压幅值及噪声关系的理论模型,结合直径0.1 m,光纤总长10 m,精细度24的陀螺参数,得到背向散射噪声导致的陀螺BS对调制电压变化范围与噪声幅值量化指标的需求,为特定精度的陀螺设计奠定误差分配和控制参数设计基础。The backscattering noise of the resonant loop is one of the main optical noises in the resonator fiber optic gyroscope(RFOG) system.Based on the theoretical analysis of the influence of the backscattering noise in the resonant ring on gyro output error, comparing the influence of different modulation waveforms and carrier suppression channels, the best solution is the triangular modulation with dual-channel.Based on this scheme, a theoretical model of the relationship between the gyro bias and bias stability(BS) error with the modulation voltage amplitude and noise is established.Combining the gyro parameters with a diameter of 0.1 m, total fiber length of 10 m and the fineness of 24,the requirements of the gyro zero-BS caused by backscattering noise on modulation voltage variation range and quantitative index of noise amplitude is obtained.It lays the foundation of error distribution and control parameter design for specific precision gyro.

关 键 词：谐振式光纤陀螺 背向散射 载波抑制 调制电压幅值 调制电压噪声 零偏稳定性 

分 类 号：V241.59[航空宇航科学与技术—飞行器设计]