外挂设备对飞行器电磁散射特性的影响  

Influence of External Store on Electromagnetic Scattering Characteristics of Aircraft

作　　者：刘战合 王菁 姬金祖[2] 王晓璐 杨永攀 Liu Zhanhe;Wang Jing;Ji Jinzu;Wang Xiaolu;Yang Yongpan(School of Aeronautic Engineering,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]郑州航空工业管理学院航空工程学院,郑州450046 [2]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《航空工程进展》2018年第2期252-258,共7页Advances in Aeronautical Science and Engineering

基　　金：国家重点基础研究计划(973计划)(61320);航空科学基金(2016ZA55001;2015ZD55005);河南省科技攻关计划(182102210444;152102210137);郑州航空工业管理学院青年骨干教师资助计划(2017-12)

摘　　要：外挂设备会造成飞机外形的变化,从而影响隐身性能,为了研究其带来的不同角度、频率时的电磁散射特性变化趋势和规律,以有、无外挂设备飞行器电磁模型为基础,采用物理光学法,数值模拟不同频率、不同俯仰角下的RCS曲线,分析两种模型RCS曲线分布特性、俯仰角特性,其中引入RCS相对增量概念分析外挂设备影响。结果表明:头向角域,不同俯仰角下有外挂模型算术均值呈"W"型分布,而无外挂模型为倒"V"分布;周向角域,有外挂模型呈倒"V"分布;头向角域相对增量呈"W"分布,相对增量为10~25dB;周向震荡分布,为7~17dB。The aircraft shape could be changed by external equipment,thus the stealth performance could be also influenced.In order to study the variation trend and law of electromagnetic scattering characteristics with different angles and frequency,based on the electromagnetic models of aircraft with and without external equipment,the RCS curves of different frequencies and different pitch angles are simulated by the physical optics method.And RCS curves’ distribution characteristics and pitch angle characteristics of the two models are analyzed.The definition of RCS relative increment is proposed to analyze the influence of external equipment.The results show that,in the angle domain on nose direction,the arithmetic mean values of the model with external store in different pitch angles appears＂W＂type distribution,and the model without external store appears inverted ＂V＂distribution.The model with external store appears inverted＂V＂type distribution on the circumferential direction.The relative increments appear＂W＂type distribution in angular domain on nose direction,and their values are about 10~25 dB.And the circumferential distribution of relative increments appears oscillation,and the values are about 7~17 dB.

关 键 词：外挂 电磁散射 隐身 飞行器 RCS 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程] TN011[电子电信—物理电子学]