Affiliation:
1. School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing, China
Abstract
With the promotion and enhancement of stealth technology of helicopter rotor components, the research on the dynamic radar cross section (RCS) of helicopter rotor is becoming more and more important and imminent. In order to facilitate the calculation and analysis of the electromagnetic scattering characteristics during rotor rotation, a dynamic scattering calculation (DSC) method based on quasi-static principle (QSP) and grid coordinate transformation is presented. After analyzing the advantages and disadvantages of QSP, the dynamic principle is used to describe the rotation process of the rotor. Combined with the grid coordinate transformation method, the RCS of the rotor is accurately calculated by physical optics (PO) and physical theory of diffraction (PTD). Then the influence of azimuth, elevator angle and observation distance on rotor dynamic RCS is analyzed. The results show RCS of the tail rotor is indeed dynamic and periodic and its main influencing factors include azimuth and elevation angle. The proposed DSC method is efficient and effective for studying the dynamic RCS of tail rotor.
Funder
the Excellence Foundation of BUAA for PhD
the National Natural Science Foundation of China
the project funded by China Postdoctoral Science Foundation
Subject
Mechanical Engineering,Aerospace Engineering
Cited by
3 articles.
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1. Investigations on electromagnetic scattering characteristics of aircraft rudder considering electromagnetic discontinuities;Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering;2023-09-29
2. W-type flying wing radar cross-section analysis;Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering;2022-08-04
3. Study of RCS characteristics of tilt-rotor aircraft based on dynamic calculation approach;Chinese Journal of Aeronautics;2022-04