数字闭环光纤陀螺仪的随机噪声分析  

Analyzing random noise of digital closed-loop fiber optic gyroscope

作　　者：崔艳[1] 栾婧文 顾宏[1] 

机构地区：[1]天津工业大学理学院,天津300387

出　　处：《天津工业大学学报》2015年第5期81-84,共4页Journal of Tiangong University

基　　金：国家自然科学基金资助项目(61304252)

摘　　要：分别对影响陀螺仪性能的各种噪声进行了分析.利用闭环传递函数,建立了随机噪声模型,系统地研究了探测器接收光功率、偏置点和探测器跨阻抗与光纤陀螺仪随机游走系数(RWC)之间的关系.根据对随机游走系数模型的分析,选择了光学组件,组装成陀螺仪并对陀螺仪的参数进行了优化设计.得出陀螺仪的主要参数:探测器跨阻抗Rf为80 kΩ;光功率I0为100μW;相对偏置点准b为4π/5.将计算出的RWC理论值与利用Allan方差法得到的实际测量值进行了比较,验证了随机游走系数模型的正确性.A variety of noise affecting gyro was analyzed. In addition, by using the closed-loop transfer function, the ran- dom noise model was established to systematically investigate the relationship between the detector receiving light intensity, bias operating point, the detector trans-impedance and fiber optic gyro random walk coefficient （RWC）. Furthermore, the characters of the gyro was optimized. It is found that the main parameters of gyro are Rf = 80 kΩ, I0 = 100 μW, φb=4π/5. By comparing the theoretical values calculated by RWC with the actual measured values obtained by Allan variance, the correctness of the random walk coefficient model was verified.

关 键 词：光纤陀螺仪 随机噪声 随机游走系数 闭环传递函数 

分 类 号：TN966[电子电信—信号与信息处理] V241.5[电子电信—信息与通信工程]