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针对捷联成像寻的器,首先给出体视线和弹体姿态到惯性视线的映射关系,然后通过推导映射函数的雅克比矩阵,给出了从体视线和弹体姿态到惯性视线的误差传递公式。通过分析误差传递增益的范数,讨论了弹体姿态和弹目相对位置对惯性视线角计算的影响。由于体视线受到成像寻的器视场的约束,其角度测量值较小,合理简化了误差传递公式,给出了惯性视线误差的近似计算公式。最后应用蒙特卡洛实验,验证了近似计算公式的精度和结论。
For the strapdown imaging seekers, the relationship between the body sight line and the projectile attitude to the inertial line of sight is given firstly. Then, the error transfer from the body line of sight and the projectile attitude to the line of inertia is given by deducing the Jacobi ratio of the mapping function formula. By analyzing the norm of error propagation gain, the influence of projectile attitude and relative position of projectile on the calculation of inertial visual angle is discussed. Since the body line of sight is constrained by the field of view of the imaging seeker, the measured value of the angle is small, which reasonably simplifies the error transfer formula and gives the approximate formula of the inertial line-of-sight error. Finally, the Monte Carlo experiment is applied to verify the accuracy and conclusion of the approximate calculation formula.