利用差分光学观测量的脱靶量处理方法

为在导弹飞行试验中获得更高精度的光学脱靶量处理精度,提出了利用同步跟踪的差分光学观测量计算脱靶量的方法,使用同帧画幅测元差和历元差2种不同的差分法消除误差.根据导弹攻击靶机前所获光学图像的不同,将问题分为3种情况:同步同帧画幅观测量,无同画幅观测量,非同步而同画幅观测量,分别给出了不同的计算方法.按照试验场景进行仿真,对新方法做了评估,结果表明差分方法与传统方法相比精度提高可达分米量级.

A Method of Computing Miss Distance by Using Difference Optical Observations

To get higher-precision miss distance in the missile flight test,a method of computing miss distance was introduced by using difference observations from synchronized optical measurement equipment.Two kinds of difference observations,including measurement difference from the same film and epoch-wise difference between epoch sequences,were used to eliminate measurement errors.According to the observation data before the missile attacks its target,the problem was divided into three cases:synchronized same-frame film observations,the case without same film observations,and asynchrinous same-film observations.Different solutions were given for each case.Detailed simulation under the actual test scenario was performed to evaluate the new method.The results show that the differential method improves accuracy up to one decimeter than the traditional one.