Electric Double Coaxial Tilt-rotor Aircraft Design

At present,the research of conventional helicopters and fixed wing aircraft has been relatively mature.But in terms of performance,the cruising speed of conventional helicopter is far slower than fixed wing aircraft.At the same time,fixed wing aircraft do not have the ability of vertical taking off and landing.The structure of the tilt-rotor aircraft is unique.It has the dual characteristics of the ordinary helicopter and propeller aircraft.In helicopter mode,the tilt-rotor aircraft can take-off and landing vertically like a helicopter;in the aircraft model,the tilt-rotor aircraft can cruise with high speed.The research of tilt-rotor aircraft has been a hot topic in aviation field.An integrated scheme of a 100 kg class electric double coaxial tilt-rotor UAV was put forward in this paper.Firstly,the integrated scheme and main parameters of the aircraft has been determined according to the design requirements of the tilt-rotor UAV.Secondly,the detail design scheme and parameters of each system and components of the tilt-rotor UAV was presented according to the design requirements.Then the aerodynamic characteristics of the tilt-rotor UAV using the CFD method was analyzed.The rationality of the design of the tilt-rotor UAV was verified by calculating the aerodynamic performance of the rotor and the aircraft.Then the flight performance of the aircraft was analyzed under various flight condition.Finally the strength of the main components of the tilt-rotor UAV especially the strength of tilt-rotor hub and fuselage was analyzed.Using the topology optimization function of ANSYS Workbench,optimum design of the hub under fixed load was obtained.Under the condition to satisfy the statics intensity,the hub weight was reduced by 29.9% compared to the original one.Through the analysis of the design of electric tilt-rotor UAV,the integrated scheme and the method has been proved feasibly and the tilt-rotor UAV model proposed in this paper is reasonable.The proposal is good and potential for further development.