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研究复合制导的战术导弹中末制导交班的导引头预定精度问题．提出用小扰动法分析导引头预定参数对误差源的误差敏感性关系．以中远程防空导弹为例，结合导弹运动方程组和目标运动模型，计算了中末制导交班的导引头预定参数，并计算了在制导站雷达测量误差下的末制导导引头预定参数的计算精度．可知，导引头定位参数的计算误差随着弹目距离的接近而显著增大，得到中末制导交班不能太晚的重要结论．
The problem of the precision of the seeker’s guidance accuracy in the composite guided tactical missile is studied. A small perturbation method is proposed to analyze the error sensitivity of the seeker’s predetermined parameters to the error sources. Taking long-range and medium-range air defense missiles as an example, combined with the equations of motion of missiles and the target motion model, the parameters of the seeker in mid-end guidance and hand-over are calculated, and the parameters of the final guidance seeker in the guidance station radar measurement error are calculated calculation accuracy. It can be seen that the calculation error of seeker positioning parameters increases significantly with the closeness of the projectile distance, and an important conclusion that guidance missive shift can not be too late is obtained.