Detailed Features Modeling of Vibrating Wing’s Micro-Motion Characteristics

Wings of flying targets vibrate due to the influence of external factors. This phenomenon is more pronounced for large wings and there will be detailed features that affect the micro-motion characteristics. The electromagnetic scattering characteristic of this kind of micro-motion of wings in actual flight is of great significance to target recognition and identification. This paper focuses on the modeling and analysis of the micro-motion characteristics and detailed features due to vibration and deformation. Firstly, the mathematical geometric model of wing vibration was established. Then the according to scattering field is simulated, and a time-frequency analysis was performed on the results. Micro-Doppler features different from conventional results were observed in the result. Starting from the detailed feature in spanwise, chordwise, and airfoil, the vibration modeling study of wings was carried out. Eventually, it was found that the twist of the airfoil caused this phenomenon.