线圈隔热层对光纤陀螺温度误差的影响分析

针对温度变化所引起的光纤陀螺非互易相移误差,详细研究了隔热材料对减小热漂移误差的作用,并详细比较了使用不同厚度隔热层的光纤陀螺在相同变温历程下的热漂移误差大小以及达到热平衡状态所需的时间。仿真结果表明,当隔热层的厚度由0mm变化到4mm的过程中,热漂移误差的峰值由0.12(°)/h降低到了0.08(°)/h,同时达到热平衡的时间从2 520 s增加到了3 600 s。利用该仿真结果,可以在保证热启动时间满足条件的前提下找到一个最优的隔热层厚度,从而使热漂移误差的峰值最小。

Influence of thermal insulation layer of fiber coil on FOG thermal drift

To deal with the thermally induced nonreciprocal phase shift in fiber coil,the influence of thermal-insulation material on suppressing the thermal drift of fiber-optic gyroscope (FOG) is studied.The thermal drift errors and the thermal steady times of FOG with different thicknesses of thermal-insulation layer under the same temperature procedure are analyzed based on detailed comparison.Simulation results show that,with the thickness of thermal-insulation layer increased from 0 mm to 4 mm,the peak value of thermal drift is decreased from 0.12 (°)/h to 0.08 (°)/h,and the steady time is increased from 2520 s to 3600 s.According to this investigation,an optimal thickness of thermal-insulation layer could be achieved to minimize the thermal drift peak-value under the condition that the thermal start-up time is guaranteed.