The Design Of Flapping-Wing Mechanism And Its Dynamic Simulation And Analysis For A Bionic Flapping-Wing Micro Air Vehicle

Because Flapping-Wing Micro Air Vehicle (FMAV) has broad prospective applications in the civil and military domain, more and more researchers have been attracted to it. In this thesis a flapping-wing mechanism is designed with its dynamic analysis and simulation. The primary purpose of this study is to design a highly effective, reliable and lighter flapping-wing mechanism and make some efforts to improve the flight performance and expand the application domain for a FMAV. The main content of this thesis is as follows:A new mechanism is proposed to mimic the motion of hawk moth's wing. The motion includes both flapping and rotation of the wing. The new mechanism consists of a geared five-bar mechanism and a shaper quick-return mechanism as well. The geared five-bar mechanism generates the path of figure eight and the shaper quick-return mechanism generates the rotation of the wing. Moreover, it is studied how the motion path changes while the parameters of the flapping-wing mechanism vary. Some patterns are gathered to provide the basis for the choosing of parameters.Optimization-Based Mechanism Synthesis (OBMS) method is employed to carry out the synthesis of the mechanism, and results in the parameters of the mechanism. Kinematic simulation and analysis of the flapping-wing mechanism is conducted by means of Pro/E. The simulation result is consistent with design requirement. It shows that the mechanism is feasible.By the foundation of the scaling laws, some parameters of bionic wing are determined. Combine Gambit, Fluent and C program language together, the unstable aerodynamics simulation of suspended bionic wing is conducted. The relationship between the flapping frequency and the lifting force is analyzed, and the flapping frequency at which the air vehicle will suspend in the air is determined.Utilizing Pro/E, the forces acting on each crucial kinematic pair are obtained. These forces should be provided for the choosing and designing of mechanical elements.