Electromagnetic scattering characteristics of coaxial helicopter based on dynamic transformation method
| Autor: | Zeyang Zhou, Jinjun Wang, Jun Huang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Acoustics Coordinate system Aerospace Engineering 02 engineering and technology Radar stealth 01 natural sciences 010305 fluids & plasmas law.invention 020901 industrial engineering & automation law Rotor 0103 physical sciences Pitch angle Motor vehicles. Aeronautics. Astronautics Physics Scattering Mechanical Engineering Dynamic electromagnetic scattering TL1-4050 Radar cross section Physical optics Azimuth Coaxial rotors Fuselage Coaxial helicopter Physics::Accelerator Physics Coaxial |
| Zdroj: | Chinese Journal of Aeronautics, Vol 34, Iss 2, Pp 516-528 (2021) |
| ISSN: | 1000-9361 |
| Popis: | With the development of coaxial rotors and high-speed helicopters, the electromagnetic scattering characteristics of coaxial helicopters have gradually become a research hotspot. In order to deal with the Radar Cross-Section (RCS) of high-speed rotating rotors or coaxial main rotors, a Dynamic Scattering Method (DSM) based on dynamic process simulation and grid coordinate transformation is presented. Instantaneous electromagnetic scattering from rotors and helicopters is solved using Physical Optics (PO) and Physical Theory of Diffraction (PTD). Important factors are analyzed and discussed in detail, including individual rotor rotation, azimuth, elevation angle, fuselage, pitch angle, and roll angle. The results show that the electromagnetic scattering characteristics of rotor-type components are dynamic and periodic. The dynamic RCS period of a single rotor is related to the dynamic RCS period of the coaxial main rotor. Choosing different observation angles and attitude angles has a great impact on the static and dynamic RCS of the helicopter. The presented DSM is effective and efficient to analyze and determine the dynamic electromagnetic scattering characteristics of conventional helicopters or coaxial helicopters. |
| Databáze: | OpenAIRE |
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