Compound helicopter multi-rotor dynamic radar cross section response analysis

With the advancement of helicopter stealth technology and the development of compound helicopters, dynamic electromagnetic scattering of rotor or multi-rotors has become a hot topic of research. In order to deal with the radar stealth problem of compound helicopter target non-coaxial multi-rotor, a multi-rotor dynamic scattering (MDS) calculation method based on dynamic simulation principle (DSP) and multi-axis rotation transformation (MRT) is presented. Single rotor, azimuth angle, elevation angle, rotor disc tilt and attitude angle are all calculated and analyzed in detail. The results show that the electromagnetic scattering of the rotor-like targets exhibits significant periodicity, and the disc tilt or attitude angle affects this periodic and full-machine dynamic scattering. The proposed MDS method is effective and efficient for the dynamic electromagnetic scattering of aircraft operating on individual rotor or multi-axis rotor-type targets.