海面舰船RCS起伏分布模型研究

RCS Fluctuation Distribution Models Research of Ship Target on Sea

为准确地描述海面舰船动态RCS起伏特性,评估舰船系统隐身效果,在获取海面船只外场动态360°全向RCS数据的基础上,采用χ2分布、对数正态分布对舰船RCS起伏分布进行拟合分析,并利用K-S检验开展拟合优度检验。结果表明在15GHz测量频率条件下,该海面舰船目标360°全向RCS测量数据同时服从对数正态分布和χ2分布,且χ2分布具有更高精度的拟合效果。文中的分布模型研究方法与结果可应用于对海面其它强散射特性目标RCS分布特性研究,从而为舰船散射性能和隐身评估设计提供理论支撑。

For describing the dynamic RCS fluctuant characteristics and radar scattering characteristics, evaluates the stealth effect of ship target on sea, on the basic of get outfield dynamic 360° omni-directional RCS data, uses χ 2 distribution model, log-normal distribution model to fit RCS fluctuations distribution characteristics of ship target, and the method of K-S is used for goodness-of-fit test.The results verify that under the 15GHz measurement frequency, 360° omni-directional RCS data of the ship deferred to the χ 2 distribution model, log-normal distribution model at the sometime, the fit effect of χ 2 distribution model has the better precision the further more.The research method and result of this article can be used for research RCS distribution characteristics of other electrically large objects on sea, afford theory brace for stealth design and evaluation to warship.