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Structure and operation method of multi-axis aircraft with different propellers

A multi-axis aircraft and flight controller technology, which is applied in the direction of aircraft, unmanned aircraft, aircraft parts, etc., can solve the problems of unfavorable downward penetration, interference with the falling direction of the nozzle, turbulence, etc.

Inactive Publication Date: 2019-06-07
韩振铎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the theory of propeller slices, also known as vortex theory, since a vortex is formed around the propeller during rotation, the adjacent propellers rotate in the opposite direction, and the vortex generated is also opposite, which will cause the problem of turbulence. Part of the water mist will be rolled up to the top of the aircraft, which is not conducive to penetrating downward
[0004] The nozzles of the plant protection UAVs in the prior art are usually installed under the propellers. For example, the authorized announcement number is CN204527638U, and the patent name is "Coaxial Reverse Propeller Multi-axis Plant Protection UAV". The nozzles are installed on the arms. , the whole is located under the propeller, so that during the flight of the aircraft, the propeller rotates. Since the propellers are the same size, the adjacent propellers rotate in opposite directions, and the reverse vortex generated will interfere with the downward spraying direction of the liquid from the nozzle. Not conducive to downward penetration

Method used

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  • Structure and operation method of multi-axis aircraft with different propellers
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Embodiment Construction

[0027] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The present invention discloses a structure and operation method of a multi-axis aircraft with different propellers. It should be pointed out that the power mechanism described in the following embodiments of the present invention is a brushless motor, and the brushless DC motor is composed of a motor body and a driver. A typical mechatronic product, the KV value of the motor is the no-load speed of the motor, which means that the output voltage increases by 1 volt, and the speed value of the idling speed of the brushless motor increases. From this definition, we can know that the input of the brushless motor voltage and the idling speed of the motor follow a strict linear proportional relationship. The higher the KV value of the motor, the smaller the torque provided, and the KV value is also closely related t...

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Abstract

The invention discloses a structure and an operation method of a different-propeller multi-axis aircraft, which includes two types of propellers, and corresponding power speeds also have two types. The specific principle is that the two symmetrical powers located on the nozzle are high-speed powers, and the propellers matched with them are small propellers with larger pitch and smaller size. The power and propellers of other shafts are large propellers with low speed power and small pitch and large size. The advantage is that a small propeller is matched with high-speed power, and a large propeller is matched with low-speed power. Under the same circumstances, high-speed power rotates faster, and the airflow velocity generated is also significantly faster than that produced by low-speed power. At the same time, the size of the propeller is reduced and the distance between it and other propellers is widened to reduce the mutual turbulence, which is more conducive to the downward movement of the droplets, so that the droplets ejected from the nozzle under the high-speed power are driven downward by the high-speed airflow Blow away for better penetration.

Description

technical field [0001] The technology relates to the technical field of aircraft power configuration, relates to a structure of a multi-axis aircraft with different propellers, and in particular relates to a mechanism and an operation method of a multi-rotor plant protection unmanned aerial vehicle. Background technique [0002] Multi-axis aircraft, that is, multi-rotor UAV, has multiple propellers, and multiple propellers are controlled by multiple power mechanisms to achieve flight. It is widely used in various fields such as aerial photography, monitoring, search and rescue, resource exploration, and agriculture. It has a small size , light weight, low cost, flexible operation and high safety. [0003] At present, the propellers used by all multi-rotor aircrafts have almost the same height and structure on the same machine. Therefore, the downward airflow speeds generated between the propellers are almost the same. For plant protection, the drone used to spray crops spra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D1/18B64C27/08B64C39/02
CPCB64C27/08B64C39/02B64D1/18B64U10/10B64U2101/00
Inventor 韩振铎
Owner 韩振铎
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