基于逐步回归分析的激光惯导温度补偿研究

Research on Temperature Compensation of Ring Laser Gyroscope Strapdown Inertial Navigation System based on Stepwise Regression Analysis

针对激光陀螺惯导的温度补偿,将影响激光陀螺零偏的各种可能的变量作为零偏补偿的状态变量,利用逐步回归分析方法,挑选出对零偏贡献较大的显著变量,建立精准的数学物理模型,并对实测的激光陀螺进行温度补偿建模。结果表明,温度变化率以及与温度的交叉积对温度补偿模型的影响不显著,得到的温度补偿模型可以对陀螺的零偏进行实时补偿,提高了陀螺的精度。

A method is proposed for laser gyro temperature compensation. All kinds of related variables of laser gyro bias are used as the state variables of error compensation. By using the method of stepwise regression analysis, variables of signifi- cantly correlated with bias are preserved. A precise mathematical physical model is also established. The temperature com- pensation model of laser gyroscope has been validated by real-time experiment. The investigated result shows that bias is not related well to temperature＇s grads and rate. The temperature compensating model can compensate Laser gyro bias real time and improve precision of the Laser gyro inertial navigation.