Model design and aerodynamic characteristic analysis of variable-amplitude flapping wing aircraft

At present, micro air vehicles (MAVs) are being popularized in both military and civilian fields and are playing an increasingly important role. The flapping wing organism shows its advantages of high aerodynamic efficiency, quick action, and stable hover during flight. In this paper, by studying flapping wing insects, a new type of flapping wing aircraft was proposed, and a mechanical structure model and control system with variable rotating orbit radius were designed. When the rotating radius changed, the chip controlled the rotation of the variable rail motor and then changed the position of the displacement slider from the rotation center, which was finally represented by the change in the flapping amplitude of the flapping wing through the transmission mechanism. According to the designed mechanical structure, the coordinate system was established, and the expression was derived. At the same time, XFlow was used to carry out fluid simulation tests. Through the benchmark experiment, the fluid simulation test of the variable amplitude of the two wings, and the fluid simulation test of the amplitude of the variable single wing, the corresponding conclusions were obtained, and the rationality and feasibility of the variable-amplitude flapping wing aircraft model were verified. It provided data support for follow-up research and prototype production.