大量程高精度光纤陀螺的设计与实现

Design and Implementation of High Precision I-FOG with Wide Dynamic Range

采用增强Sagnac效应的方式提高干涉式光纤陀螺精度时，往往会减小陀螺的量程。从理论角度分析了高精度光纤陀螺实现量程扩展的可能性，完成了相关的算法设计，实现了跨条纹工作的平滑过渡，搭建了实验平台，成功将高精度光纤陀螺的量程从Ω-π～Ω-π扩展到Ω-7π～Ω7π。通过对量程扩展前后陀螺标度因数、零偏稳定性等参数的对比，得到了陀螺在量程扩展后不影响其基本参数的结论，进一步验证了高精度光纤陀螺的大量程设计的正确性和可靠性。

An ideal way to achieve high precision of I-FOG is to enhance Sagnac effect. Lengthing the fiber and enlarging the diameter of fiber coil are the major two methods. However, they bring sharp decrease on the dynamic range of I- FOG. An algorithm attempting to make the I-FOG work on higher interference fringe is presented and designed. The ex- periment platform to verify the algorithm is also established. Experiment results show that the dynamic range of I-FOG is successfully enlarged from Ω-π- Ω-πtoΩ-7π- Ω7π. The bias and scalar factor tests show that the dynamic-range-ex- tended I-FOG is at the same precision as the original I-FOG, which give a further evidence to prove the correctness and reliability of the dynamic-range-extended algorithm.