The Flapping Wing Flight Design And Aerodynamic Test Research

The flapping-wing micro vehicle(FLMAV) is a multidisciplinary comprehensive research project, it is integrated with microelectronics technology, flexible mechanism, the micro power systems and other cutting-edge technology, the future trend of FLMAV will be miniaturization and intelligent; we will face the problems of how to achieve the miniaturization of components and the meet the requirements of functions at the same time.I sorting the current research situation of the FLMAV in the first chapter of the paper, analysis the progressions and shortcomings of the current FLMAV, Summarize the difficulties and key technologies of the FLMAV, Looking forward to the future development trend of the FLMAV.In the second chapter of the paper, I Base on the research of bats flapping mode, and put forward a kind of bat-like flapping wing micro air vehicle scheme, this scheme can comfortably imitate bats’ peculiar way of flying and drive by a single motor, not only realize coordinated motion of flapping and folding, but also improve the factor of quality and power; the Symmetrical flapping wing mechanism can ensure the synchronous movement of left and right wings and provide the guarantee of smooth flight; we use the cam mechanism to control the wing’s extend and shrink, we can control the wings fold state by adjusting the cam contour and initial phase angle; coordinate the flapping mechanism and folding mechanism, we can programming the space track of wing; we construct the model of flapping and folding wings and compile the simulation program, we achieve the expected goal by the simulation results.In the third chapter of the paper, Optimization for the driving mechanism of the MFAV about wingspan400mm about the proposed FLMAV project, build a kind of mathematical mode of wings folding, establish the mathematical mode of wings flapping angular velocity use the method of Assur group, and establish the mathematical mode of aerodynamic force with the strip theory, and take this force as the objective function, the constraint condition are the limitation of bionics and mechanisms; the result shows that:the aerodynamic force of wings have increased by about73%after optimization, the transferring efficiency of mechanism has also greatly improved.In the forth chapter of the paper, We establish the dynamic equation of bat-like flapping wing air vehicle using the Lagrange equation, the influence of aerodynamic drag of wings and moment of inertia to the crank speed are analyzed in this paper. First, according to the knowledge of fluid mechanics, the mathematical model of aerodynamic of foldable wing is established; second, aiming at the equivalent dynamics model for the single degree of freedom planar linkage mechanism, we regard the planar linkage mechanism as a rigid body system consisted of particle system and plane hybrid system, the mathematical expressions of equivalent moment and equivalent moment of inertia are established under the condition of wings flapping and folding; finally, system’s equivalent dynamic model is established based on the Lagrange equation, to solve the real motion of system, lay the theoretical foundation for the accurate calculation the aerodynamic lift of the flapping wing air vehicle.