基于固定频率激光器的低成本闭环谐振陀螺系统仿真  

Simulation Research on Low-cost Closed-loop Resonator Gyro System Based on Fixed Frequency Laser

作　　者：贺洋 张志鑫[1] 索鑫鑫 HE Yang;ZHANG Zhixin;SUO Xinxin(Beijing Institute of Aerospace Control Instruments,Beijing 100039,CHN;Beijing Aerospace Times Optoelectronics Technology Co.Ltd.,Beijing 100094,CHN)

机构地区：[1]北京航天控制仪器研究所,北京100039 [2]北京航天时代光电科技有限公司,北京100094

出　　处：《半导体光电》2021年第5期646-651,共6页Semiconductor Optoelectronics

摘　　要：提出了一种使用固定频率窄线宽激光器作为干涉光源的闭环谐振式光纤陀螺系统。该系统利用相位调制器对干涉光进行移频控制,完成对谐振腔逆时针方向谐振频率的跟踪和锁定。建立了陀螺系统Simulink模型并仿真研究了不同速率点下的陀螺输出特性,结果表明,±200(°)/s速率范围内逆时针谐振频率锁定时间小于15ms,陀螺标度因数非线性为2.41×10^(-4)。与采用传统频率可调谐窄线宽激光器的闭环谐振式光纤陀螺系统相比,两者锁频时间和标度因数非线性基本一致。该研究为低成本闭环谐振式光纤陀螺系统的实现提供了理论和数据支撑。A closed-loop resonant fiber optic gyroscope system using a fixed frequency narrow linewidth laser as the interference light source is proposed.The system uses a phase modulator to perform frequency shift control of the interference light to complete the tracking and locking of the resonant frequency in the counterclockwise direction of the resonant cavity.In this paper,a Simulink model of the gyro system was established and the output characteristics of the gyro were simulated at different speed points.The results show that the lock time of the counterclockwise resonance frequency in the range of±200(°)/s is less than 15 ms,and the gyro scale factor nonlinearity is 241 ppm.Compared with the closed-loop resonant fiber optic gyroscope system using traditional frequency tunable narrow linewidth lasers,the frequency lock time and scale factor nonlinearity of the two systems are basically the same.This research provides theoretical and data support for the realization of low-cost closed-loop resonant fiber optic gyroscope system.

关 键 词：固定频率激光器 谐振式光纤陀螺 相位调制器 SIMULINK仿真 锁定时间 标度因数非线性 

分 类 号：TN253[电子电信—物理电子学] V241.5[航空宇航科学与技术—飞行器设计]