Variable-pitch quadrotor unmanned aerial vehicle

Abstract

The invention provides a variable-pitch quadrotor unmanned aerial vehicle. The variable-pitch quadrotor unmanned aerial vehicle provided by the invention comprises a variable-pitch module and a vehicle body module. The variable-pitch module comprises a top connecting block, a variable-pitch propeller, a bearing, a loading frame, a connecting column, a hollow shaft brushless motor, an anti-collision net, a transmission shaft, a gear and a steering engine; and the vehicle body module comprises a central holder and vehicle arms. Compared with most quadrotor unmanned aerial vehicles, by using thevariable-pitch quadrotor unmanned aerial vehicle of the invention, a variable pitch device is additionally arranged, the flight attitude of the unmanned aerial vehicle can be adjusted by changing a propeller pitch and the motor rotating speed at the same time, the expected tension of a user is achieved by adjusting the propeller pitch and the motor rotating speed, meanwhile, the power consumptionof the unmanned aerial vehicle is reduced, and when a certain wing of the unmanned aerial vehicle fails, the pitch of a pair of diagonal propellers can be changed to ensure the balance of a momentum moment so that the unmanned aerial vehicle can continuously and normally fly, the reliability of the unmanned aerial vehicle is improved, more complex tasks can be executed, the maneuvering characteristics of the unmanned aerial vehicle are enhanced, and the practical value of the unmanned aerial vehicle is greatly enhanced.

Description

technical field [0001] The invention relates to the field of UAV manufacturing, in particular to a variable-pitch four-rotor UAV. Background technique [0002] Quadrotor drone is an unmanned aerial vehicle with four propellers. According to the sensing state, the drone outputs 4 PWM waves through the flight control board to control the electronic governor, and then control the rotation of the hollow shaft brushless motor. state, to achieve the purpose of flight. Due to its small size and convenient use, quadrotor drones have been widely used in military, photography, transportation, medical assistance, investigation, monitoring and other fields in recent years. [0003] However, the quadrotor UAV currently adopts a fixed-pitch structure, which has the disadvantages of short battery life and poor maneuverability, making it unable to be used in some specific fields, such as long-distance reconnaissance and smooth landing after wing failure. , resulting in that it may not be ...

AI Technical Summary

Problems solved by technology

[0003] However, the four-rotor UAV currently adopts a fixed-pitch structure, which has the disadvantages of short battery life and poor maneuverability, making it unable to be used in some specific fields, such as long-distance reconnaissance and smooth landing after wing failure. , resulting in it may not be able to meet the user's requirements when performing tasks such as photography and reconnaissance. The flight attitude of the drone can improve the endurance of the drone and ensure the normal flight of the drone in the flipped state; and when a wing of the drone fails, it can adjust the remaining propeller pitch and motor speed to ensure its momentum moment balance , so that it can continue to fly safely and achieve a smooth landing. This innovative design improves the reliability of the UAV, enabling it to achieve long-endurance and high-stable flight in complex environments, and greatly enhances the practical value of the UAV.

Images