Hybrid power tail sitting type vertical takeoff and landing long-endurance unmanned aerial vehicle and flight control method thereof

Abstract

The invention provides a hybrid power tail sitting type vertical takeoff and landing long-endurance unmanned aerial vehicle and a flight control method thereof. The unmanned aerial vehicle comprises a fuselage, wings, a main driving motor, propellers, a piston power ducted propeller and tail wings mounted on a duct. According to the invention, two sets of power systems, namely a motor and a piston engine, are adopted; in a vertical takeoff and landing stage which is short in time and requires large power, the motor serves as driving power, the advantage of high power-weight ratio of the motor can be fully exerted, and thus the weight of the power systems is reduced; in a cruising flight stage, the tail piston engine and the ducted propeller system driven by the tail piston engine drive the unmanned aerial vehicle to fly forward, and the piston power and the ducted propeller system can be selected and designed according to the optimal cruising state without considering the vertical takeoff and landing state, so that the fuel consumption rate of the cruising state can be effectively reduced; in combination with high-aspect-ratio wings, long-time flight of the unmanned aerial vehicle can be ensured; and meanwhile, because the weight of the power systems is reduced, the empty weight ratio of the unmanned aerial vehicle can be reduced, and the loading capacity of the unmanned aerial vehicle can be effectively improved.

Description

technical field [0001] The invention relates to the field of aviation technology, in particular to a hybrid tail-sitting vertical take-off and landing long-endurance unmanned aerial vehicle and a flight control method thereof. Background technique [0002] Based on the development situation at home and abroad, there are many forms of vertical take-off and landing fixed-wing UAVs, one of which is the tilting power type, which uses the thrust and pull generated by the power to support the weight of the aircraft during vertical take-off and landing. The power tilt is used as the driving force for forward flight, and the power is generally a rotor, a propeller or a ducted fan. These can be subdivided into three categories: one is to install the power on the fuselage or wing, and simply tilt the power, such as the American unmanned tilt-rotor UAV "Hawkeye", the Israeli Aircraft Industry Company's "Hawkeye" Panther" tilting propeller UAV, etc.; one type is to install the power on...

AI Technical Summary

Problems solved by technology

For the tilting power UAV, since a set of power system is used to provide vertical take-off and landing lift and horizontal flight pulling force respectively, the power required for vertical take-off and landing is usually the largest, while the power required for fixed-wing cruise flight is the largest. Smaller, so the power and weight of its power plant are much larger than those of fixed-wing aircraft without vertical take-off and landing functions, and there is too much power power surplus during cruising flight, which does not work in the best state, and the fuel consumption rate increases , which brings problems such as high empty weight ratio, small load capacity and short endurance time of tail-sit UAV

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