光纤陀螺温度误差模型研究

Temperature compensation model research on fiber optic gyroscope

对由Shupe效应引起的误差进行了理论分析,光纤环径向温阶会产生光纤陀螺零偏漂移。设计和完成了测量环境温度对光纤温度的影响试验,环境温度变化率与Shupe效应误差存在线性关系。在此基础上,设计和完成了在测量环境温度变化时光纤陀螺输出的试验,分别使用环境温度变化率的一阶、二阶和三阶项对陀螺输出的变化趋势进行建模,对模型的有效性进行了验证。结果表明:一阶模型与二阶、三阶模型相比,模型更简单、稳定性更高,能够准确地反映由Shupe效应引起的误差值,补偿效果好,与理论分析结果相符。

The error model of Shupe effect is analysed theoretically,the radial temperature levels of fiber coil will produce the zero bias drift of FOG.The experiment to measure the effect of the ambient temperature on the temperature of the fiber is designed and completed,there is a linear relationship between the change rate of ambient temperature and the error of Shupe effect.Based on the analysis,the experiment to measure the FOG output is designed under the conditions of temperature changing,the gyro output trend is modelled using the first-order、second-order and third-order.The raw data of the gyro output are compensated,the obtained temperature model is verified to set the different temperature curve under the same conditions.The result shows that using the first-order model of temperature changing the error value caused by Shupe effect can be most accurately reflected,comparing with the second-order and third-order model,it is more simple and more stable,and has good compensation effect,and this is also consistent with the conclusions of the theoretical analysis.