Dynamic Modeling And Flight Simulation Of Flapping Wing Aerocraft

Flapping wing aircraft is inspired by the bionics,it is a kind of aircraft that have a function of self-adaptive according to the environment and missions.Flapping wing aircraft,compared to fixed wing aircraft,shows obvious advantages and application value in national defense military and civil aviation.This paper put a lot of effort into nonlinear multi-body dynamics modeling using quasicoordinates Lagrange equations and flight simulation of flapping wing aircraft.Referring to the basic mode of birds flying which is flapping wing/glide/flapping wing/glide,this paper build multi-body dynamics model of flapping wing aircraft.First,research the characteristics of flapping flight and glide of birds and insects,and abstract and simplify the motion characteristics in order to build multi-body dynamics model.On the basis of the motion characteristics model and physical model,this text estimate the aerodynamic characteristics of the two flight model of flapping wing aircraft using Vortex-Lattice method.Second,the physical model is turned into a multi-body model,and build nonlinear multi-body dynamics model using quasicoordinates Lagrange equations.Last,simulate the aerodynamic characteristics base on nonlinear multi-body dynamics modeling and aerodynamic characteristics data which is obtained earlier.The result of flight simulation shows that flapping wing aircraft have better aerodynamic characteristics.The flapping wing aircraft can keep moving forward and climb or descent through the basic mode of birds flying.For one thing,it prove the effectiveness of nonlinear multi-body dynamics modeling,for another,it shows that it is viable to research flapping wing aircraft.This paper build multi-body dynamics model and motion characteristics model of the flapping wing aircraft,and analyze the flight simulation.Flapping wing aircraft,compared to fixed wing aircraft,shows obvious advantages and application value in national defense military and civil aviation.There is great application value of the method of multi-body dynamics modeling that this paper used which can apply to other morphing aircraft.