Heavy-load low-structure-complexity double-coaxial-twin-rotor unmanned aerial vehicle

Abstract

The invention discloses a heavy-load low-structure-complexity double-coaxial-twin-rotor unmanned aerial vehicle, wherein rotor transmission mechanisms are arranged at the left side and the right side of a vehicle body of an unmanned aerial vehicle body; through transmission mechanisms arranged on the unmanned aerial vehicle body, power is transmitted to the rotor transmission mechanisms arranged at the two sides of the unmanned aerial vehicle body through driving shafts; the rotor transmission mechanisms transmit the power to an upper rotor and a lower rotor through an upper rotor transmission rod and a lower rotor transmission rod via the transmission among four mutually engaged bevel gears; and the identical-rotating-speed and opposite-direction rotation of the upper rotor and the lower rotor is realized. A total variable-pitch mechanism is arranged between the upper rotor transmission rod and the upper rotor, and the regulation of the pitch angle and the roll angle of the unmanned aerial vehicle is realized; a variable-total-pitch mechanism is arranged between the lower rotor transmission rod and the lower rotor, the regulation of the total pitch of the unmanned aerial vehicle is realized; and the yaw angle and the total lift of the unmanned aerial vehicle are controlled. The heavy-load low-structure-complexity double-coaxial-twin-rotor unmanned aerial vehicle has the advantages that the characteristics of heavy effective load and high output power are realized; and a redundancy design method is adopted, and the flight stability of the unmanned aerial vehicle is improved through the design of multiple rotors and multiple sets of variable-pitch mechanisms.

Description

technical field [0001] The invention belongs to the field of coaxial double-rotor aircraft and multi-axis multi-rotor unmanned aircraft, in particular, it is a double-coaxial dual-rotor unmanned aircraft with large load and low structural complexity. Background technique [0002] With the vigorous development of UAV technology, users' requirements for the performance of UAVs are also constantly improving. The large load and easy control of UAVs have become the focus and focus of current research. [0003] The most common unmanned helicopter has a single-rotor and tail rotor layout. Compared with the coaxial dual-rotor helicopter, the payload is larger, the structure is more compact, and the hovering efficiency in the air is increased by 17% to 30%. The characteristics of high efficiency and low power consumption that other aircraft of the same magnitude cannot surpass. Many scientific research institutions at home and abroad have carried out relevant research on coaxial dua...

AI Technical Summary

Problems solved by technology

[0004] Nevertheless, the traditional coaxial dual-rotor control mechanism is complicated, the design is difficult, the research and development cost is high, and the coupling between control variables is serious, which restricts the development of unmanned coaxial dual-rotor aircraft; Due to the limitations of many factors such as motor efficiency, blade structural strength, design size, etc., the payload and ease of control are difficult to meet the needs of users.

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