Four aircraft

Students: Chen-Jay Xu Zheng-Xian Hung Advisor: Ru-Li Lin

Outline• 1 What is Four aircraft • 2 Four aircraft structure• 3 Four aircraft control • 4 Four aircraft principle• 5 Four aircraft use • 6 Four aircraft worries• 7Comparison of multi-axis aircraft• 8Conclusion• 9Literature

1 What is Four aircraft• Four aircraft is a multi-axis aircraft with

four rotors to floating and propulsion flight. Fixed-wing aircraft and different, it by rotating rotor aircraft took off. Its four rotors the same size, distribution symmetrical position. By adjusting the relative speed between the different rotor to adjust torque, stability control aircraft flying, rotating or turning.

• Early aircraft design, four aircraft were used to solve the problem of torque rotorcraft. Main and auxiliary rotor torque design can solve the problem, but not the sub rotor to provide lift and low efficiency. So Four aircraft were the first batch of heavier than air VTOL aircraft. But the earlier model performance is poor, difficult to manipulate and larger.

• Four aircraft have recently gained a new life in the UAV field. The use of electronic control systems and electronic sensors, four aircraft flight stability, flexible manipulation. Can be used indoors and outdoors, four aircraft, small size, light weight, easy to carry.

2 Four aircraft structure

Propeller

The control circuit board

Battery

Brushless Motor

Stand

3 axis aircraft control

Four aircraft control flow chart

Androidcellphone

Remote system

Control system

Brushless Motor

Electronic transmission

Easy lifting mechanism

3 Four aircraft control (remote system)• 1 receiver (Bluetooth module, four groups

with R2004GF moving remote control receivers, etc ...)

3 Four aircraft control (control system)• The control circuit (APM2.5 flight control

board, Ardino UNO, etc. ...)

4 Four aircraft control (line)

• Electric Speed Controler, ESC • Require high current to start the motor, it

is not with the same power supply control circuit,

• Furthermore, the control circuit and the intermediate motor needs a "PWM digital signal and pure electric."

• Conversion bridge.

4 Four aircraft control (motor)

• Brushless Motor

4 Four aircraft principle

• There are four rotor aircraft in space six degrees of freedom (along the three axes respectively for translational and rotational motion), the six degrees of freedom can be controlled by adjusting the motor speed to achieve different. The basic state of motion are: (1) vertical movement; (2) pitching motion; (3) roll movement; (4) yaw movement; (5) before and after exercise; (6) lateral movement

• (1) vertical movement

• (2) pitching motion

• (3) roll movement

• (4) yaw movement

• (5) before and after exercise

• (6) lateral movement

5 Four aircraft use Ex1

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5 Four aircraft use Ex1

• 1 aerial photography (photography, investigation, etc. ...)

5 Four aircraft use Ex1

• Four aircraft empty filming

5 Four aircraft use Ex2

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5 Four aircraft use Ex2

• Cargo transport (commercial, emergency, etc. ...)

5 Four aircraft use Ex2

Amazon push UAV Courier

6 Four aircraft worries

• 1 Four aircraft flying (affecting flight)

6 Four aircraft worries

• 2 Four aircraft photographed (Privacy)

7 Comparison of multi-axis aircraftAxis Three aircraft Four aircraft

Picture

Compare

1. Each shaft has a rotational speed of each axis.

2. When side fly, subject to calculate the lateral force.

1. Shaft speed is symmetrical, a group of two.

2. When flying side, only one axis control motor speed.

8 Conclusion• Four aircraft is a product of modern science

and technology under the ...• Each product of demand generation are

being manufactured, It has a lot of room for improvement, but also a very wide use

• Many uses, to see how the needs of those who use Hello

• This highly functional products, is looking forward to the convenience it brings

9Literature• Wikipedia• http://zh.wikipedia.org/wiki/%E5%9B%9B%E8%BD

%B4%E9%A3%9E%E8%A1%8C%E5%99%A8#1• http://www.shs.edu.tw/works/essay/2013/11/2013

111419352712.pdf• http://goods.ruten.com.tw/item/show?

21301169449011• http://ardutwfans.blogspot.tw/2012/06/blog-

post.html