Design And Research Of The Bionic Albatross Flapping-wing Aircraft

Flapping-wing flight mode is the main mode of most birds and insects in nature.Compared with fixed-wing flight and rotor-wing flight,this flight mode has the advantages of flexibility,efficiency and concealment.Therefore,it has great application potential in various civil and military fields.The bionic realization of flapping-wing aircraft is the concentrated embodiment of many advanced science and technology,and is the focus of research in the field of aircraft at present.At present,flapping-wing aircraft has the problems of low flight efficiency,poor aerodynamic performance,short flight time and short distance.In this paper,referring to bird flight,aiming at the above problems,we carry out targeted research and design an albatross flapping-wing aircraft with high flight efficiency.This paper first explains the background of the research topic and analyzes the practical significance of the research;By consulting relevant literature,the typical cases of flapping-wing aircraft design at home and abroad and the relevant aerodynamic theoretical research results are summarized,and the existing problems in the current flapping-wing aircraft research are clarified.After that,the flight mechanism of the albatross with excellent flight efficiency is analyzed,its body and wing structure are analyzed,and the two motion modes of flapping flight and gliding flight as well as the wing motion characteristics under these two flight modes are explored.Summarize and summarize the flight characteristics and laws,and abstract the key characteristics of the albatross movement.Learn flapping-wing flight principle and dynamics;The movement process of flapping-wing flight is analyzed,and the key design parameters are defined to provide reference for mechanical structure design.Carry out aircraft structure design,define aircraft design requirements,and estimate key parameters of flapping wing aircraft by using bionic design scale law;With the estimated values as reference,the parameters of aircraft flapping mechanism,motor,transmission system,tail-wing mechanism,gliding mechanism and other components are calculated,scheme selection and structural design are carried out.The wing of flapping wing aircraft is selected and different types of classical wing are analyzed.Select the most suitable scheme for the flying characteristics of the flapping wing aircraft in this paper;The above design modules are built into three-dimensional model and the assembly design is carried out.This paper analyzes the albatross flapping-wing aircraft designed in the previous article.The flapping mechanism and gliding locking mechanism of the bionic albatross flapping aircraft are analyzed in kinematics,the transmission relationship is calculated,and the end trajectory equation is determined.The dynamic analysis of flapping-wing aircraft under flapping-wing action mode is carried out to calculate the lift and thrust during the flapping-wing period.The main factors affecting the flapping-wing aerodynamic characteristics of the bionic albatross flapping-wing aircraft are analyzed.In order to improve the flight efficiency and extend the flight time of the aircraft,the main parameters related to the aerodynamic performance of the aircraft are analyzed,and the effects of Reynolds number,flutter frequency and flutter pitch angle on the aerodynamic performance of the aircraft are analyzed.At the end of this paper,the research content of the full text is summarized,and the future work of the designed flapping-wing aircraft is planned.