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Six-DOM (degree of freedom) full-control eight-rotor aircraft based on variable pitch

An eight-rotor aircraft and variable-pitch propeller technology, which is applied in the field of unmanned aircraft and can solve the problem that the quad-rotor cannot change the angle of the aircraft itself.

Pending Publication Date: 2018-08-07
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, when the UAV is flying automatically, the traditional quadrotor cannot change the angle of the aircraft itself to adapt to the special path and avoid obstacles.

Method used

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  • Six-DOM (degree of freedom) full-control eight-rotor aircraft based on variable pitch
  • Six-DOM (degree of freedom) full-control eight-rotor aircraft based on variable pitch
  • Six-DOM (degree of freedom) full-control eight-rotor aircraft based on variable pitch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] High propeller efficiency moves horizontally, and the attitude control power structure provides lift that can offset the gravity of the aircraft, that is, the first elevator propeller 13 and the third elevator propeller 15 are equipped with positive blades, and the motor speeds of the second elevator propeller 14 and the fourth elevator propeller 16 are equal. Elevating propeller one 13 and elevating propeller three 15 have the same direction of rotation and are equal in size, and elevating propeller two 14 and elevating propeller four 16 have the same direction of rotation and are equal in size, and the resultant force of the torque produced by each group of paddles is zero, so that the aircraft is suspended in the air. Stop, and then provide the thrust in the horizontal direction through the variable pitch propeller, so as to realize the horizontal movement in any direction. The pitch can be adjusted during flight to adapt to different environments, so that the motors ...

Embodiment 2

[0045] Constant attitude movement, when the attitude control power structure is like the traditional four-rotor control aircraft attitude, due to the coupling relationship between attitude and position, there will be a corresponding position movement. At this time, the opposite horizontal force is provided by the variable pitch propeller. When the opposite force is just right When offsetting the horizontal component force generated by the attitude control power structure, the aircraft does not move and maintains the current attitude. When the force generated by the variable pitch propeller is greater than the horizontal component force generated by the attitude adjustment, the aircraft can maintain this attitude and move freely.

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Abstract

The invention discloses a six-DOM (degree of freedom) full-control eight-rotor aircraft based on variable pitch. Variable pitch propellers can perfectly change the direction of push. Four variable pitch propellers are added in the horizontal direction; the pitch can be changed optionally as required; changing the speed of motors is not required, and instead, two motors may rotate in the same direction to generate push through blades; in addition, maximum blade efficiency can be guaranteed; the pitch can be changed according to different flight tasks; the pitch can be automatically changed through feedback during flight; a fixed pitch can also be set such that the aircraft attains maximum flight efficiency during a flight task. Under the action of variable pitch, the aircraft can complete the tasks better, such as optional-direction takeoff, target tracking, stunts, in-situ posture adjusting, fixed point landing, and special slope landing and has high application value.

Description

technical field [0001] The patent of the present invention relates to the technical field of unmanned aerial vehicles, especially to provide a six-degree-of-freedom full-control eight-rotor aircraft based on variable-pitch propellers for decoupling control of position and attitude and maximizing paddle efficiency. Background technique [0002] The traditional quadrotor controls the rotation speed of four motors to simultaneously control the position and angle of the quadrotor, which cannot be realized due to the limitation of the number of control inputs. The invention patent solves the underactuation problem of the aircraft by adding four variable pitch propellers perpendicular to the splint surface. The variable pitch propeller can automatically (or manually) change the propeller blade angle during flight according to the flight speed and height. The traditional propeller The blade cannot change the pitch, and the blade can only be customized according to the power of the ...

Claims

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Application Information

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IPC IPC(8): B64C27/08B64C27/59
CPCB64C27/08B64C27/59B64U10/10B64U30/20B64U50/19
Inventor 肖冰全凯史博傅振洲杨佳魏一然
Owner BOHAI UNIV