Principle and composition of four-axis aircraft

Principle and composition of four-axis aircraft

Before we actually start making four-axis aircraft (four-rotor), let's take a look at the basic composition and principle of the four-axis aircraft. In addition to understanding the necessary theoretical principles, it is also necessary to know the four parts of a four-axis aircraft-rack, flight control, sensor and motor and ESC this paper selected from the four-axis aircraft practice Tutorial University Bully .

Realization principle of 1.3.1 four-axis flying vehicle

A four-axis aircraft is an aircraft that flies in the air. In order to get cheap power, it can only use the aerodynamic force, can not fly like a rocket. Therefore, the power of the four-axis aircraft, yaw action can only rely on the role of air to achieve. 1.13 is a four-axis vehicle Mechanics Simplified diagram (four-axis vehicle has two modes, here is only one example) selected from the four-axis aircraft practice Tutorial University Bully .

Fig. 1.13 Simplified mechanics diagram of four-axis aircraft

The size of the F1, F2, F3, and F4 in Figure 1.13 is determined by the speed of the paddle. The greater the speed, the greater the speed, the smaller the force, so that by controlling the size of the four force changes can achieve the four-axis aircraft forward, backward, steering (yaw) and rotation.

1.3.2 Four-axis aircraft installation platform--rack

In a four-axis aircraft, the frame (1.14) corresponds to the body's skeleton, and the frame determines the main body structure of the aircraft. The frame is the basic platform of the aircraft, the motor, the electric and the Flight Control Board (flying controller) and other equipment should be installed on the rack. The main functions of the rack are as follows:

Figure 1.14 Rack

Q provides the installation interface. These interfaces include screw holes for mounting and securing motors, ESC, and flight control boards.

Q provides an overall stable and rugged platform. A stable and robust platform is required during flight, which allows the motor to be rotated without destroying other equipment and providing a stable platform for the sensor.

Q Landing gear and other cushioning equipment. These can be used to provide safe takeoff and landing conditions for the aircraft to avoid damage to other instruments.

Q Ensure a low enough mass (weight). This gives additional headroom to other control devices.

Q provides the appropriate protection device. The protective device is used to protect the aircraft itself and the operators that may be exposed to it. Because of the unpredictable circumstances during the flight, certain protective measures can protect the equipment and other personnel, and reduce unnecessary losses selected from the four-axis aircraft practice Tutorial University Bully .

Principle and composition of four-axis aircraft