Unmanned aerial vehicle with double engines, four shafts and four rotors

Abstract

The invention discloses a highly reliable unmanned aerial vehicle with double engines, four shafts and four rotors. The unmanned aerial vehicle is composed of aero-engines, a rotor machine body, a power distribution transmission system, a flying control system and four rotor assemblies, wherein the rotor machine rotors are pitch-variable rotors and each rotor comprises a rotor rotation driving part and a rotor blade angle adjusting part. According to the unmanned aerial vehicle, two aero-engines are used for driving four rotors; each engine drives a pair of blades on a symmetrical axis and a speed reducing mechanism is additionally arranged between the engine and the blades; the rotor blade angle adjusting mechanism drives the pitch-variable blade to change the pitch, so as to change lifting force; the engines work in a relatively high efficiency section; postures such as hovering, fly forwards and backwards are realized by adjusting the pitch; and the flying control system is composed of an ARM, GPS and a three-axis gyroscope and is accurate and reliable. By adopting the double-engine scheme, when one engine fails, the attitude of the vehicle can be maintained by improving the power of the other engine, so as to land safely; and the unmanned aerial vehicle has high reliability.

Description

technical field [0001] The invention relates to a rotor unmanned aerial vehicle, in particular to a twin-engine four-axis quadrotor unmanned aerial vehicle. Background technique [0002] Quadrotor is an aircraft with four propellers, and the four propellers are in a cross-shaped structure. The opposite rotors have the same rotation direction and are divided into two groups. The rotation directions of these two groups are different. Different from the traditional rotorcraft, the quadrotor achieves various actions by changing the speed of the propeller or changing the pitch. A quadrotor is a six-degree-of-freedom vertical take-off and landing machine, so it is very suitable for flying under static and quasi-static conditions; on the other hand, a quadrotor has four input forces and six outputs at the same time, so It is also an underactuated system (an underactuated system refers to a system with less input and more output). The usual single-rotor rotorcraft has a propeller ...

AI Technical Summary

Problems solved by technology

Existing quadrotors are generally driven by motors, but the energy density of batteries is low, so they face a series of problems such as short battery life and light load, which seriously limit their scope of use and curb their application promotion; A small number of engine-driven quadrotors cannot control the rotorcraft well to achieve various air attitudes due to the nonlinearity and large time lag of the engine, which also seriously affects its flight stability, balance and reliability , Practicality

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