隐身飞机米波段RCS的统计建模研究

Research on Statistical Modeling of Stealth Aircraft's RCS in VHF Band

采用米波雷达探测作为反隐身手段时,经典的RCS起伏模型无法精确描述隐身飞机的RCS统计特性。首先仿真分析了典型隐身飞机侧站盘旋时的动态RCS;其次采用经典起伏统计模型分析了头向RCS的统计特性,并通过分布检验方法比较了统计建模结果在VHF频段和L频段的差异;最后提出了采用高斯混合分布来实现米波段RCS的精确统计建模,将有助于提高反隐身效果。研究成果将为雷达总体设计和反隐身作战提供理论依据。

The statistical characteristic of stealth aircraft＇ s RCS cannot be described exactly by classical RCS fluctuation model in VHF band. The dynamic RCS characteristic of typical stealth aircraft＇ s spiral flying was obtained by simulation method in this paper firstly. The statistical characteristic of nose direction RCS is analyzed based on classical fluctuation models, and the difference of modeling results between VHF band and L band are compared through distribution verification method. The accurate statistical modeling of RCS in VHF band by Gaussian mixture is proposed, which can improve the anti-stealth ability. The research can provide a theoretic support to radar system design and anti-stealth battle.