干涉式光纤陀螺光纤环互易性温变漂移补偿方法

分析了干涉式光纤陀螺光纤环受温度影响产生零漂误差的机理,对于温变环境下的光纤陀螺输出,在传统线性分析手段的基础上,以互易性为主,把光纤环径向内外温度差以及温度变化率的差作为研究对象,建立了新的多项式零漂评估方法.通过对模型不同幂级次的探寻,寻找到变温情况下的最佳拟合系数并进行仿真补偿,实现了陀螺精度的大幅提高,使得最佳零漂降低为原始输出的20.6%.最后,对拟合系数进行陀螺变温实验验证,证实了该新型温度补偿方法的合理性.

Reciprocal Temperature Bias Drift Compensation Method for Fiber Coil of Interferometry Fiber Optical Gyroscope

The mechanism of drift caused by temperature of interferometry fiber optical gyroscope ( IFOG ) is analyzed. The new polynomial model based on the traditional method is connected with temperature difference and variety rate in radial direction of fiber coil and used to emulate the outputs of IFOG for two different temperature environments. Through the research on the mathematical laws of model series of power function, the ideal series of the new model for the two different environments are found. The new polynomial model improves the accuracy of IFOG substantially. It could make the bias drift of new polynomial reduce to 20. 6%. At the end, the new polynomial model is verified by testing the bi-as drift of IFOG in varying temperature environment and the model is reasonable.