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研究了光纤陀螺FOG(Fiber Optic Gyroscope)温度效应和标度因数非线性误差的复合建模及补偿方法.分析了热作用于光纤环引起光路非互易性的机理,针对由温度和标度因数非线性引起的严重非线性漂移误差,提出了一种改进的实用精确补偿FOG温度和标度因数漂移的分段复合建模方法.通过对VG951型FOG全温度和全角速率范围内实际测试数据进行建模及处理表明,经分段复合模型补偿后,陀螺漂移从4.4()°/h减小到0.1()°/h,较传统补偿方法的精度得到大幅度提高,实验验证了建模方法的精确性及补偿方法的有效性.
The complex modeling and compensation method of temperature effect and non-linearity error of scale factor in Fiber Optic Gyroscope (FOG) are studied.The mechanism of non-reciprocal optical path caused by thermal effect on fiber ring is analyzed, Nonlinearity caused by serious nonlinear drift error, an improved practical and accurate compensation FOG temperature and scale factor drift composite modeling method.Through the VG951 FOG full temperature and full rate range of the actual test data The modeling and processing show that the gyro drift decreases from 4.4 () ° / h to 0.1 () ° / h after the staged composite model is compensated, which is much more accurate than the traditional compensation method. The experimental results show that the modeling method The accuracy and effectiveness of the compensation method.