为提高中、末制导交接班时导引头对目标的截获能力,对空空导弹采用高精度惯性/卫星组合导航系统时导引头的指向误差及其对目标截获性能的影响进行了研究。首先,对中、末制导交接班时雷达导引头的速度截获概率进行了分析;其次,分别建立了雷达测量误差、初始对准误差和惯性元器件误差与导弹位置、姿态测量误差和目标位置测量误差的关系,并得到了其误差影响的方差表达式;然后,对比分析了导弹位置、姿态测量误差和目标位置测量误差造成的导引头指向误差随导弹发射距离的变化;最后,通过蒙特卡罗仿真分析了捷联惯性导航系统和惯性/卫星组合导航系统对导引头截获概率的影响。结果表明:对于远程空空导弹,导弹位置测量误差是影响导引头截获概率最重要的因素;采用惯性/卫星组合导航系统可以减小导弹的位置测量误差,并将导引头截获概率的95%置信区间由(0.715 6,0.811 0)提高到(0.880 2,0.943 1)。

In order to improve the target acquisition ability of air-to-air missile guidance seeker at the time of handover,the pointing angle error of seeker and the effect of high precision INS/GPS integrated navigation system on air-to-air missile were studied.First, the velocity acquisition probability of seeker at the handover from intermediate to terminal guidance was analyzed.Then, a variance analysis method was used to analyze the seeker pointing angle error caused by airborne radar measurement noises,initial sensor errors and initial misalignment.Monte-Carlo method was used to study the effect of SINS navigation system and INS/GPS integrated navigation system on the target acquisition probability.The results showed that: 1) for a long-distance air-to-air missile, the measurement error of missile position is the most important ingredient that has effect on seekers target acquisition probability; and 2) the application of INS/GPS integrated navigation system can reduce the measurement error of missile position, and increases the 95% confidence interval of acquisition probability from (0.7156,0.811 0) to (0.880 2,0.943 1).