锥柱体弹道目标遮挡效应分析

针对锥柱体弹道目标观测过程中存在的遮挡效应,探究遮挡区与可视区分界线在弹道目标上的具体位置,提出一种判断散射中心是否处于遮挡状态的方法。在窄带雷达观测的条件下,建立锥柱体弹道目标滑动散射中心模型,分析各散射中心的微多普勒特性。通过对目标遮挡成因进行研究,分析遮挡区与可视区分界线的具体位置,并提出一种判断散射中心是否处于遮挡状态的方法。仿真结果表明:理想散射中心与滑动散射中心微多普勒存在一定差异,遮挡效应会导致微多普勒出现截断现象且不同观测视角下遮挡效应对散射中心的影响不同。

Analysis on Shielding Effects of Cone Cylinder Ballistic Target

Aimed at the problems that the shielding effects of cone cylinder ballistic target exists in the process of observation, the concrete location of the boundary between the shielding area and the visible area can be made a thorough inquiry, and a novel algorithm is proposed to judge whether the scatter is shielded or not. First, a mathematic model of echo based on the observation in narrow band radar is built. Then, a model of sliding scatters of the cone cylinder ballistic target is built, and the characteristic of each scatter is analyzed. Finally, this paper looks into the causes of the shielding effects, analyzes the location of the boundary between the shielding area and the visible area, and proposes a novel algorithm to judge if the scatter is shielded. The simulation shows that the micro Doppler curves of ideal scatters and sliding scaffers are different and shielding effects will result in the francation phenomenon of the micro Doppler curves with the change of observation angles, which proves that the conclusion of this article is right and the algorithm is effective. And this provides a reference for the feature analysis of ballistic target being shielded.