第18卷
第10期
2010年10月
文章编号
1004-924X(2010)10-2171-07
光学精密工程
Optics and Precision Engineering
微小型光纤陀螺组合分时复用技术
马东营，宋凝芳，金靖，宋镜明
（北京航空航天大学仪器科学与光电工程学院，北京100191）
Vol.18
No.10 Oct,2010
捕要：为了有效减小多轴光纤陀螺组合的功耗、体积和重量，实现光纤陀螺组合的微小型化，应用分时复用技术，提出了一种基于3×3耦合器，工作在850nm短波长的光纤陀螺分时复用组合结构。分析了陀螺输出数据处理方法，得到了分时复用光纤陀螺组合的相对极限零偏稳定性。建立了分时复用光纤陀螺切换模型，揭示了分时复用导致光纤陀螺轴向切换必然存在一个过渡过程，分析了过渡过程对陀螺组合静态、动态特性的影响。结果显示，光纤陀螺组合的相对零偏稳定性是传感方法的2.1倍，最大输人信号检测带宽为1.1kHz，标度因数的不对称性和非线性度均小于50X10-"，最
后，通过仿真进行了实验验证，结果表明，该技术可以用于中低精度微小型多轴光纤陀螺组合中。关键词：光纤陀螺；激小型化；分时复用；过渡过程；零偏稳定性
中图分类号：TN253：V241.5
文献标识码：A
doi;10.3788/OPE.20101810.2171
Time-divisionmultiplexingfor
micro-miniaturefiber-optic gyroscopes MA Dong-ying, SONG Ning-fang, Jin Jing,SONG Jing-ming(School of InstrumentScienceand Opto-electronicsEngineering,
BeihangUniversity,Beijing 100191,China)
Abstract: To reduce the power consumption, volume and the weight of a fiber optic gyroscope, the structure of a time division multiplexing fiber-optic gyroscopic system worked at 850 nm was presen-ted based on a 3X3 coupler. The data processing method of gyroscopic output was analyzed, and the relative bias stability of the time division multiplexing system was obtained. A switching model of the time division multiplexing fiber-optic gyroscope was established, which pointed out that there is a transient process in axis switching. The effects of the transient process on the static and dynamic characteristics of the gyroscopic system were analyzed, which shows that the relative bias stability is about 2. 1 times that of the traditional method, the maximum bandwidth is about 1. 1 kHz and both the nonlinearity and uniformity of the real scale factor are less than 5o X 1o. Finally, the results were tested and verified by simulations and experiments, and results indicate that the time division
multiplexing can satisfy the requirements of applications to micro-miniature fiber-optic gyroscopes. Key words: fiber-optic gyroscope; microminiaturization; time division multiplexing; transient process;
zero bias stability
收稿日期：2009-10-15：修订日期：2009-12-28
基金项目：国家863高技术研究发展计划资助项目（No.2007AA04Z436)