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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0.681n mile/h,为进一步提高合成孔径雷达(SAR,Synthetic ApertureRadar)成像分辨率奠定基础.
Aiming at the problem of measurement error in the whole temperature dynamic environment of INS (Inertial Navigation System), this paper proposes a method of all-directional six-directional forward and reverse velocity calibration and piecewise linear interpolation compensation.According to the working environment to set the calibration temperature, The calibration scheme of six-directional forward and reverse velocities was designed at each constant temperature point, and the piecewise linear interpolation algorithm was used to compensate the temperature deviation of zero bias and scale factor in real time to improve the measurement accuracy of system temperature and dynamic environment.The experimental results show that, The mean RMS error of the vehicle-borne and the flight experiment was decreased from 1.501 n mile / h and 5.811 n mile / h to 0.393 n mile / h and 0.681 n mile / h, respectively. In order to further improve the synthetic aperture radar (SAR, Synthetic ApertureRadar) imaging resolution.