谐振式光纤陀螺谐振腔传输模型仿真方法  

Simulation method for resonant cavity transmission model of resonant fiber optic gyroscope

作　　者：陈熙源[1,2] 沙梦梦 钟雨露 李启轩 张飞麟 CHEN Xiyuan;SHA Mengmeng;ZHONG Yuu;LI Qixuan;ZHANG Feilin(School of Instrument Science and Engineering,Southeast University,Nanjing 210096,China;Key Laboratory of Micro-Inertial Instrument and Advanced Navigation Technology,Nanjing 210096,China)

机构地区：[1]东南大学仪器科学与工程学院,南京210096 [2]微惯性仪表与先进导航技术教育部重点实验室,南京210096

出　　处：《中国惯性技术学报》2024年第7期707-714,共8页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金(61873064);国防预研基金(6922002230)。

摘　　要：谐振式光纤陀螺(RFOG)是一种以光纤环形谐振腔为核心敏感器件的惯性传感器。为提高仿真效率和适用性,提出了一种谐振式光纤陀螺快速运算仿真方法,搭建了谐振式光纤陀螺信号处理和闭环控制模型,其中模拟谐振腔多圈干涉耦合采用多核并行运算,包含光场叠加和传递函数两种形式。仿真结果表明所提方法仿真效率较高,平均在16s左右完成仿真,相比于原始模型的锁频程序运行效率提升了57.6%。同时两种仿真形式均适用于精度范围0.0001~1(°)/√h的谐振光纤陀螺仿真,有效适应不同仿真参数的测试要求。其中传递函数形式相较于光场叠加形式仿真效率提升了5.4倍,在±600(°)/s动态范围内标度因数非线性度降低了17%,而光场叠加形式的零偏不稳定性减小到0.652(°)/h,易于观察偏振波动误差特性。Resonant fiber optic gyroscope(RFOG)is a kind of inertial sensor with a fiber ring resonator as the core sensitive device.To improve the simulation efficiency and applicability of the simulation,a resonant fiber optic gyro fast operation simulation method is proposed,and a resonant fiber optic gyro signal processing and closed-loop control model is constructed,in which the simulation of the resonant cavity multi-turn interferometric coupling adopts multi-core parallel operation and contains two forms of optical field superposition and transfer function.The simulation results show that the proposed method has high simulation efficiency,and the simulation is completed in about 16 s on average,which improves the running efficiency of the frequency locking program by 57.6%compared with the original model.Simultaneously,both simulation forms are suitable for the resonant fiber gyro simulation with an accuracy range of 0.0001~1(°)/√h,which can effectively adapt to the testing requirements of different simulation parameters.The simulation efficiency of the transfer function form is improved by 5.4 times compared with that of the optical field superposition form,and the scale factor nonlinearity is reduced by 17%in the dynamic range of±600(°)/s.The zero-bias instability of the optical field superposition form is reduced to 0.652(°)/h,and the polarization fluctuation error characteristics are easily observed.

关 键 词：谐振式光纤陀螺 传递函数 光场叠加 并行计算 

分 类 号：TN253[电子电信—物理电子学]