光纤陀螺零偏温度误差补偿方法分析

Research of Bias Temperature Error Compensation Method in Fiber Optic Gyroscopes

根据光纤陀螺光纤环受温度效应影响的机理,分析了光纤陀螺零偏产生温度误差的原因,提出了光纤陀螺基于光纤环附近多点温度的误差补偿方法,建立光纤陀螺零偏随光纤环附近多点温度及温度变化率变化的数学补偿模型。根据全温温度实验,分析光纤陀螺零偏随温度变化的规律,确定补偿模型的补偿系数,对光纤陀螺零偏进行温度误差补偿。并将多点温度补偿方法与传统的基于单点温度补偿方案的补偿效果进行对比分析。结果表明,基于两点及以上温度的温度误差补偿模型能将全温零偏稳定性降低2个数量级,全温极差降低1个数量级,优于基于单点类的温度补偿方案,且具有很高的工程应用价值。

According to the mechanization that temperature influence the fiber ring,the reason of producing bias temperature error in fiber optic gyroscopes is analyzed,temperature error compensation method based on the multiple points'temperature of fiber ring is proposed,and temperature error compensation model is established,which relies on multiple points'temperature and the speed of temperature variation around the fiber ring.On the base of full temperature experiment,the rule that fiber optic gyroscopes'bias changes with temperature is analyzed,coefficient of compensation model is confirmed.So fiber optic gyroscopes'bias temperature error gets compensated.Meanwhile,the multiple points'temperature compensation method is analyzed and compared with traditional single point's temperature compensation scheme.The result shows that multiple points'temperature compensation method is better than single point's scheme,bias stability in the full temperature range reduces 2 orders of magnitude,range in the full temperature reduces 1 order of magnitude,and the multiple points'temperature compensation method has great engineering application value.