null

 研究了雷达导引头的交班误差以及截获概率与交班时刻弹目几何位置的关系,提出了单个误差角的导引头天线指向角误差模型,它与两个误差角的导引头指向角误差模型相比可以更好地分析天线指向角误差,并得到使指向角误差最小的弹目几何位置;然后进一步得到使多普勒频率误差最小的弹目几何位置;给出了最终的截获概率的表达式,截获概率由目标处于导引头天线主波束的概率、目标回波多普勒频率落入接收机频带内的概率和目标的检测概率组成的;最后分析了一种典型的中末交班情况.

Research on the Relation Between the Seeker's Handover and the Geometrical Position of the Missile and the Target

A single error angle model of seeker's pointing angle is proposed first, which is different from two error angle model in that it's easy to analyzed the beam pointing error by just analyzing the single error angle. The optimal geometrical position between the missile and the target at handover is derived in order to minimizes the pointing error by applying linear transformation, and the optimal geometrical position at handover which minimize the Doppler frequency error is also obtained. The performance of handover is benchmarked by the probability of interception, which includes three parts, the probability of detection, the probability of the Doppler frequency falling in the bandwidth of Doppler filter and the probability of the target falling in the main lobe of the beam. The probability of interception is influenced by geometrical position between target and missile, including the range and the line of sight. Finally a simple but typical situation is analyzed to illustrate the relation between the geometrical position and the probability of interception.