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目前弹载惯性测量组合测试标定精度受外界干扰影响较大,特别是光纤陀螺温度稳定性低,易受环境温度影响参数变化,导致误差补偿效果不好。针对该问题,提出设计一种光纤陀螺旋转惯性测量组合。在惯性测量组合外加旋转轴,在导弹飞行过程中使惯性测量组合绕旋转轴连续旋转,将射前补偿不完全误差调制为周期项,从而达到误差自补偿的效果。理论分析和仿真结果表明,通过旋转不仅能自动补偿与转轴垂直方向惯性仪表的常值误差和部分安装误差,而且能补偿加速度计部分一次项误差、二次项误差和部分交叉轴耦合项误差,选择合适的旋转方案还可以完全消除旋转速度与陀螺仪标度因数误差、安转误差的耦合误差。
At present, the calibration accuracy of the combination test of missile inertial measurement is greatly affected by external disturbances, especially the temperature stability of fiber optic gyroscope is low and the parameter variation is easily affected by ambient temperature, resulting in poor error compensation effect. In response to this problem, it is proposed to design a FOG rotational inertial measurement combination. Inertial measurement combined with the rotating shaft, the inertial measurement in the missile during the flight around the rotating shaft combination of continuous rotation, the incomplete compensation of the injection before the error is modulated periodic items, so as to achieve the effect of self-compensation error. Theoretical analysis and simulation results show that not only the constant error and part of the installation error of the inertial meter perpendicular to the rotation axis can be automatically compensated through rotation, but also the error of the first order term, the second order term and the part of the cross-axis coupling term of the accelerometer can be compensated. Select the appropriate rotation program can also completely eliminate the rotation speed and gyroscope scale factor error, the error of the coupling error.