光纤陀螺静态温度特性的分析及实验研究

Analysis and experiments on static temperature characteristic of FOG

温度是影响光纤陀螺(FOG)精度的重要因素之一。对于中高精度的FOG,温度效应将不可再忽略。在缓慢温变环境中工作的FOG,应主要考虑其静态温度特性。首先从理论上分析了FOG静态温度效应的主要成因,继而分析了实验设计的原理及实际应用中的补偿方法,最后设计了实验方案并进行测试。测试数据表明FOG的标度因数和零偏与静态温度之间呈近似线性的关系。使用最小二乘法对数据建立1～7次模型,比较模型之间的特点并选择较优的一个,用于补偿陀螺的输出。输出补偿结果显示,新的方案可使FOG可以工作在高温或低温的缓慢温变环境中,而不会影响其输出精度。

This paper tries to use models to reduce the static temperature effects for FOGs working in slow temperature-variation environment.First,the main causes of FOG＇s static temperature effects are analyzed,and the experiment principle and its compensate method are given.Then the experiment schemes are designed and tested.The testing data shows that the bias and the scale factor of FOG are both approximately linear to the static temperature.From the 1st to 7th order models constructed by the least squares method,the third order model is selected and used to compensate the output of FOG.The comparison results show that the proposed method could significantly improve the precision of FOG in relatively stable temperature field,which is value in engineering for medium-and high-precision FOG.