Study of RCS characteristics of tilt-rotor aircraft based on dynamic calculation approach  

作　　者：Zeyang ZHOU Jun HUANG 

机构地区：[1]School of Aeronautic Science and Engineering,Beihang University,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》2022年第4期426-437,共12页中国航空学报（英文版）

基　　金：supported by the Project funded by China Postdoctoral Science Foundation(Nos.BX20200035,2020M680005)。

摘　　要：To study the Radar Cross-Section(RCS) characteristics of the tilt-rotor aircraft, a dynamic calculation approach that takes into account rotor rotation and nacelle tilt is presented.Physical optics and physical theory of diffraction are used to deal with the instantaneous electromagnetic scattering of the target. The RCS of the aircraft in the helicopter mode, fixed-wing mode and transition mode is analyzed. The results show that in the fixed-wing mode, the blade has a weaker deflection effect on the head incident wave in the horizontal plane. The helicopter mode improves the scattering of the rotor in the horizontal plane, while it increases the scattering source on the surface of the nacelle. At a fixed tilt angle, the RCS of the aircraft under a given azimuth angle still shows obvious dynamic characteristics. Dynamic tilting significantly changes the scattering effects of blades, hubs, nacelles and wingtips. The proposed approach is shown to be feasible and effective to learn the electromagnetic scattering characteristics of the tilt rotor aircraft.

关 键 词：Dynamic electromagnetic scattering Nacelle tilt Radar cross-section(RCS) Tilt-rotor aircraft Transition mode 

分 类 号：V218[航空宇航科学与技术—航空宇航推进理论与工程]