A distance changing system and an unmanned aerial vehicle

Abstract

The invention discloses a pitch-changing system and an unmanned aerial vehicle. The torque-changing system includes a tilting mechanism and a pitch-changing mechanism. The tilting mechanism includes a tilting steering gear and a first transmission assembly. The tilting steering gear passes through the first A transmission assembly is connected with the pitch-changing mechanism; the tilting steering gear is used to control the pitch-changing mechanism to tilt relative to the tilting steering gear, and the pitch-changing mechanism is used to adjust the angle of attack of the rotor, through the pitch-changing system Drive the rotor to tilt and change the pitch, realize the rapid switching of the unmanned aerial vehicle rotor in different flight modes and the conversion of positive and negative angles of attack, and improve the efficiency of the motor and the flight time of the unmanned aerial vehicle.

Description

technical field [0001] The invention relates to the technical field of unmanned aerial vehicles, in particular to a range-changing system and an unmanned aerial vehicle. Background technique [0002] With the development of drone technology, especially the rapid development of flight control technology in recent years, the performance of drones has been continuously enhanced and the types have become more diversified. Multi-rotor drones have the advantages of simple operation, easy maintenance, vertical take-off and landing, and fixed-point hovering, but they are slow, inefficient, and short in flight time. Although fixed-wing UAVs have the advantages of fast speed, high efficiency, and long flight time, they cannot take off and land vertically. Both take-off and landing require a long runway, which restricts the use environment of fixed-wing UAVs. The vertical take-off and landing fixed-wing UAV combines the advantages of both multi-rotor and fixed-wing UAV. It has the adv...

AI Technical Summary

Problems solved by technology

However, there are still certain problems in the tilting-rotor drones in the prior art: the existing tilting-rotor drones use a power system, and the propellers with the same pitch are used to realize vertical take-off and landing and peaceful flight by tilting the power system.

Due to the big difference between the flight speed and the pulling force provided by the motor during the take-off and landing phases and the cruise phase, the response speed through variable speed adjustment is slow, the adjustment range is small, and the controllability is poor. It is easy to saturate the motor drive and affect a certain state. flight efficiency under

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