Abstract:In consideration of the flapping wing plane mechanism motion asymmetry faults,the double wings spatial four-bar flapping wing mechanisms imitating a Dragonfly Flapping-Wing air Vehicles is designed, and the kinematics analysis and motion simulation are applied to the prototype. Since its movement symmetry could strengthen stability of flight,therefore, the prototype could be used as flapping wing mechanism of imitation insect flapping wing flight vehicle. The dynamic model was established by applying the Lagrange equation, since the system speed cyclical fluctuations would directly affect the efficiency and aerodynamic characteristics of drive, the virtual prototype of this mechanism was established through ADAMS, in order to even more accurately analyze the dynamics characteristics of mechanism. Under the effect of aerodynamic load and moment of inertia, crank could not keep his uniform rotation and speed has obvious fluctuation, there is adverse effect on the stability and efficiency of Vehicles.