Multi-rotor unmanned aerial vehicle

Abstract

The invention discloses a multi-rotor unmanned aerial vehicle which comprises a vehicle body, a plurality of lifting rotors and a forward rotor, and the lifting rotors are configured to generate a lifting driving force for overcoming gravity in a lifting or level flight process of the multi-rotor unmanned aerial vehicle; the forward rotor is configured to generate a horizontal driving force for pushing or pulling the multi-rotor unmanned aerial vehicle to advance; the plurality of lifting rotors are respectively connected with the vehicle body and are distributed on the peripheral side of thevehicle body; the forward rotor is connected with the vehicle body and arranged at the head part or the tail part of the vehicle body; the multi-rotor unmanned aerial vehicle is provided with flappingconnecting mechanisms used for enabling each lifting rotor to be connected with the vehicle body in a flapping mode. The multi-rotor unmanned aerial vehicle can fly under the condition that the rotating plane/propeller disc plane of the lifting rotor is a negative rake angle by means of cooperation of the lifting rotors, the forward rotor and the flapping connecting mechanisms; power consumptionis reduced, and meanwhile, the maximum forward flight speed of the multi-rotor unmanned aerial vehicle is increased.

Description

technical field [0001] The invention relates to the technical field of aircraft, in particular to a multi-rotor unmanned aerial vehicle. Background technique [0002] When the existing quadrotor aircraft is flying forward, the plane of the paddle disc needs to bow forward to form a certain forward angle (greater than 0°) in order to generate the thrust required for horizontal flight. However, according to the calculation results of forward flight power consumption and forward flight speed, it shows that the forward flight power consumption increases with the increase of the propeller disc plane forward tilt angle. In addition, the larger the forward tilt angle, the smaller the vertical component of the aerodynamic resultant force on the rotor, so power consumption must be increased in order to overcome gravity. In addition, if the maximum power of the aircraft engine is constant, the greater the forward tilt angle of the paddle disc plane, the lower the maximum forward flig...

AI Technical Summary

Problems solved by technology

That is to say, the greater the forward tilt angle, the greater the horizontal thrust. However, the power consumption increases and the maximum forward flight speed becomes smaller, which cannot meet the current people's increasingly high performance requirements for multi-rotor drones.

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