雷达目标动态RCS特性对探测的影响研究

发布时间：2018-03-13 15:25

本文选题：雷达散射截面　切入点：气动建模　出处：《国防科学技术大学》2014年硕士论文　论文类型：学位论文

【摘要】：雷达散射截面(Radar Cross Section,RCS)是雷达目标特征信息中最重要、最基本的一个物理参数。当前普遍采用静态方法测量目标RCS,测量结果不能真实地反映目标的动态特性,采用静态数据作为雷达系统设计依据的可靠性不高,有必要研究雷达目标动态RCS特性对探测的影响。本文将F-117A作为研究对象,建模得到动静态RCS,通过建立的起伏目标检测性能评估方法对比动静态RCS对检测性能的影响。具体研究内容包括三个方面:在起伏目标检测性能评估方面,(1)全面梳理现有典型分布模型,介绍了模型各自特点及相互关系;(2)对拟合结果进行优度检验,指出非参数法等不适用于拟合优度检验的原因,说明了分段数的选取原则,并验证分段数对拟合效果的影响;(3)从理论推导和近似计算两方面对雷达目标检测概率求解方法进行详细介绍,在理论推导方面首次推导出脉冲积累后2?分布起伏目标的检测概率公式,在近似计算方面介绍了第一、二代起伏模型的检测概率近似快速算法。在RCS对雷达探测威力影响方面,(1)提出通过均值与起伏损耗来评估动静态RCS对雷达探测威力影响差异的方法;(2)系统性地对比了动静态RCS在雷达探测威力方面的差异,得出了具有借鉴意义的结论。在测量手段改善方面,提出了雷达目标姿态角兴趣区的概念及解算方法,使通过静态测量描述目标动态特性成为可能,在保证数据动态特性的同时降低了测量成本。本文利用仿真手段研究雷达目标动态RCS特性对探测的影响有助于评估雷达探测系统的真实作战性能,并对目标外形与雷达系统设计具有重要的指导意义。
[Abstract]:Radar Cross Security (RCS) is the most important and basic physical parameter in the feature information of radar target. At present, static method is widely used to measure the RCSs, and the measured results can not truly reflect the dynamic characteristics of the target. The reliability of radar system design based on static data is not high. It is necessary to study the influence of radar target dynamic RCS characteristics on detection. In this paper, F-117A is used as the research object. The dynamic and static RCSs are obtained by modeling, and the effect of dynamic and static RCS on the detection performance is compared by the established performance evaluation method of undulating target detection. The specific research contents include three aspects: evaluating the detection performance of undulating targets in a comprehensive way. The existing typical distribution model, This paper introduces the characteristics of the models and their relationship) to test the goodness of fitting results, points out the reasons why the non-parametric method is not suitable for the goodness of fitting test, and explains the principle of selecting the piecewise number. And verify the effect of segment number on the fitting effect.) from the theoretical derivation and approximate calculation of the radar target detection probability solution method is introduced in detail, in the theoretical derivation of the first derivation of the pulse accumulation after 2? The detection probability formula of distributed undulating target is introduced in the approximate calculation. The detection probability approximate fast algorithm of the second-generation undulation model. In the aspect of the influence of RCS on radar detection power, this paper proposes a method to evaluate the difference of dynamic and static RCS to radar detection power by means and fluctuation loss. Compared with the dynamic and static RCS in radar detection power difference, In the aspect of improving the measurement means, the concept and solution method of radar target attitude angle region of interest are put forward, which makes it possible to describe the dynamic characteristics of the target by static measurement. In this paper, the influence of dynamic RCS characteristics of radar targets on detection is studied by means of simulation, which is helpful to evaluate the real combat performance of radar detection system. And it has important guiding significance for the design of target shape and radar system.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51

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