The Design Of A Ducted Coaxial Rotor Aircraft And Experimental Study

In recent years, the development of more and more of the UAV become a hot research topic in civil and military affairs, the conventional four rotor UAV technology has been nearly mature, but this kind of UAV in the structure is still not enough compact,safe operation, control is not simple. Ducted rotor UAV because of the ducted UAV,the layout is more compact,the lift is more concentrated,and play the role of safety protection,and the symmetry of the structure makes the UAV maneuver performance, hover efficiency. Based on the analysis of various types of ducted rotor UAV technology characteristics, design reference to the domestic and foreign existing several ducted rotor UAV,by reducing drag,lift,forming a coaxial dual rotor ducted UAV program, and the overall design technology for the related research.The outline of this thesis is as follows:The first chapter outlines the research background and significance of the subject,and introduces the history of the development of the UAV, and elaborates the situation of the research on the current situation of the uav.In the second chapter,the aerodynamic layout scheme of ducted UAV is analyzed,and the scheme of this subject is selected.In the third chapter, based on the overall scheme and parameters, the structure of the unmanned aerial vehicle (UAV) is designed, and the materials and the machining method are designed. The power system, the control system and the control system of the coaxial double rotor unmanned aerial vehicle are designed.In Chapter 4,the control system of the coaxial dual-rotor unmanned aerial vehicle(UAV) was designed. It mainly includes the system composition, the model establishment and the control scheme. The MATLAB was used to simulate and realize to control of the key part of the UAV.In Chapter 5 ,the experimental setup was built to study the effcts of parameters such as spacing and ducting on the lift of UAV. The prototype was designed and tested to analyze and draw conclusions.In Chapter 6, the research contents of this topic was summarized. The development of the channeled coaxial double rotor unmanned aerial vehicle was prospected.This paper finally completes the design of the overall scheme of the ducted coaxial double rotor unmanned aerial vehicle (UAV),and verifies the rationality and feasibility of the scheme through experiment and theoretical analysis. In addition, the design of the UAV aerodynamic analysis lays the foundation for further study in the future.