基于Faraday效应的光纤陀螺频率特性评估方法  

Evaluation method of frequency characteristic of fiber optic gyroscope based on magneto-optic Faraday effect

作　　者：王夏霄[1] 张猛[1] 李传生[1] 杨慧[1] 于佳[1] 王爱民 彭志强 

机构地区：[1]北京航空航天大学仪器科学与光电工程学院,北京100191 [2]湖北三江航天洪峰控制有限公司,孝感432000

出　　处：《中国惯性技术学报》2014年第1期120-124,共5页Journal of Chinese Inertial Technology

基　　金：航空科学资金资助(20120851011)

摘　　要：由于角振动台的振动频率有限,无法实现光纤陀螺的高带宽测试。提出了基于Faraday效应的光纤陀螺频率特性评估方法,采用正弦电流激励下的Faraday相位差等效Sagnac相位差,解决了激励信号输出频率有限的问题。根据光纤中的Faraday效应原理,分析了该评估方法与光纤陀螺角振动台测试方法的等效性;搭建了评估系统,使用该评估系统来模拟某型号光纤陀螺的信号处理过程,进行等效评估实验,得到了等效评估的光纤陀螺闭环带宽为9 kHz,实现了高带宽光纤陀螺的频率特性评估测试,为改善光纤陀螺的动态特性提供了有效的验证平台。The frequency response scale in the dynamic performance test of the fiber optical gyroscope＇s （FOG） is limited by the output frequency of the turntable. In this paper, a novel evaluation method to evaluate frequency characteristic of the FOG is presented based on the magneto-optic Faraday effect to eliminate the limitation. The Sagnac phase diffidence induced by rate is substituted by the Faraday phase diffidence induced by a current. Then the validly of the proposed method to evaluate frequency characteristic of fiber optic gyroscope is analyzed and theoretically verified. The evaluation system is implemented based on the proposed evaluation method, and it can imitate the signal process of FOG. The experimental result shows that the evaluated FOG has a bandwidth of 9 kHz. The proposed evaluation method is capable of test the high dynamic performance of the FOG, which benefits study of the dynamic performance of the FOG..

关 键 词：法拉第效应 光纤陀螺 频率特性 评估方法 

分 类 号：U666.1[交通运输工程—船舶及航道工程]