基于局部光路温度控制的光纤陀螺温度误差抑制方法

Fiber optic gyroscope temperature error suppression method with local optical path temperature control

针对光纤陀螺光路在温变环境下非互易性发生变化,影响光纤陀螺精度的问题,提出一种基于局部光路温度控制的光纤陀螺温度误差抑制方法。根据光纤环温度性能获得光纤陀螺的对称调整长度,通过光纤陀螺的局部温控装置将对称调整段光纤进行恒温控制。实验结果显示:不采用温度补偿,全温零偏稳定性0.1038°/h(100 s,1σ)的光纤陀螺,将其对称调整段光纤-27 cm进行恒温控制后,光纤陀螺全温零偏稳定性为0.0096°/h(100 s,1σ),温度性能提升了1个数量级。可见,所提出方法能够改善温变环境下光纤陀螺光路的非互易性,有效地抑制光纤陀螺的温度误差。

Aiming at the problem that the variation of FOG optical path non-reciprocity affects FOG precision in variable temperature environment,a method based on local optical path temperature controlling is proposed,which can suppress FOG temperature error.The FOG symmetrical adjustment length is obtained according to fiber coil temperature performance,and the symmetrical adjustment section is controlled at a constant temperature with temperature controlling apparatus.Experimental results show that when symmetric adjustment length-27 cm is controlled at a constant temperature,the FOG full temperature bias stability without temperature compensation improved from 0.1038°/h(100 s,1σ)to 0.0096°/h(100 s,1σ).The FOG temperature performance is improved by an order of magnitude,showing that the proposed method can improve FOG optical path non-reciprocity and suppress FOG temperature error effectively.