基于温度激励的光纤陀螺光纤环瞬态特性检测  

Transient Characteristic Testing of Fiber Optic Gyro Fiber Coil Based on Temperature Excitation

作　　者：李茂春[1] 刘铁根[1] 江俊峰[1] 姚晓天[1] 周友伟[1] 侯丽丽[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室光偏振研究中心,天津300072

出　　处：《光学学报》2008年第3期435-441,共7页Acta Optica Sinica

基　　金：天津市应用基础重点项目(06YFJZJC00400)资助课题

摘　　要：光纤陀螺基于萨尼亚克效应测量垂直于光纤环平面的敏感轴方向上的旋转分量。光纤环是光纤陀螺的核心部件,光纤环的缠绕质量直接影响着光纤陀螺的整体性能,对光纤环的缠绕质量全面检测十分必要。针对目前光纤环检测手段的局限性,提出了一种基于温度激励的光纤陀螺光纤环瞬态特性检测方法,全面表征了光纤环的缠绕质量。建立了光纤环柱面坐标三维计算模型,采用有限元方法定量分析光纤环不对称度和局部温度激励位置精度对光纤环瞬态响应的影响,同时开展了光纤环温度激励相应实验,实验结果与光纤环三维物理模型数值计算结果相一致,在理论和实验上验证了光纤环瞬态特性检测方法的可行性。A fiber optic gyro （FOG） uses Sagnac effect in fiber coil to detect rotation component about a sensing axis that is perpendicular to the plane of the fiber coil. The fiber coil is the key component of FOG, and its winding quality affects the integrated performance of FOG directly, so it is necessary to roundly test the fiber coil winding quality. In view of the limitation of present testing methods of FOG fiber coil, a transient characteristic testing method of FOG fiber coil based on temperature excitation was proposed, which could completely represent the winding quality of fiber coil. A computational three-dimensional fiber coil model was established. With finite element analysis technique, numerical simulations were carried out to quantitatively analyze the influence of fiber coil unsymmetry and sectional temperature excitation position accuracy on the transient response of fiber coil. At the meantime, the corresponding temperature excitation experiments were made. The experimental results are in good agreement with numerical simulation results. Finally, the transient characteristic testing method is identified feasible and acceptable by theory and experiment.

关 键 词：光纤陀螺 瞬态特性 Shupe效应 光纤环 有限元 

分 类 号：V241.533[航空宇航科学与技术—飞行器设计]