INS全温六方位速率标定及分段线性插值补偿

针对捷联惯性导航系统(INS, Inertial Navigation System)全温动态环境下测量误差问题,提出一种全温六方位正反速率标定及分段线性插值补偿方法.根据工作环境设定标定温度点,在每个恒温点设计六方位正反速率标定方案;采用分段线性插值算法实时补偿系统零偏和标度因数温度误差,提高了系统温度及动态环境下的测量精度.实验结果表明:采用该方法系统的车载和飞行实验纯惯性导航误差均值分别由1.501 n mile/h和5.811 n mile/h减小到0.393 n mile/h和0.68 1n mile/h,为进一步提高合成孔径雷达(SAR,Synthetic Aperture Radar)成像分辨率奠定基础.

Six-position rotation rate calibration and piecewise linear interpolation compensation for INS in full temperatures

For decreasing measurement error of inertial navigation system(INS),a novel scheme was proposed in which a six-position rotation calibration and piecewise linear interpolation compensation in full temperatures.A six-position rotation rate calibration experiment was implemented in a series of constant temperature.Moreover,a piecewise linear interpolation algorithm was used to compensate for bias and scale factor temperature errors of gyroscopes and accelerometers,and to improve the measurement precision of INS.The experimental results show that the inertial navigation average errors are reduced to 0.393n mile/h and 0.681n mile/h from 1.501 n mile/h and 5.811n mile/h for vehicle and airborne experiments.The proposed method is helpful to further improving image resolution of synthetic aperture radar(SAR).