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 .

1.3.1The realization principle of 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 simplified mechanical diagram of a four-axis vehicle (four-axis vehicle has two modes, here is one example) selected from four-axis aircraft Practical Tutorial University PA .

figure Span style= "line-height:1.5" >1.13   four-axis aircraft simplified mechanics diagram

Figure 1.13 in the F1 , F2 , F3 and the F4 the size 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.

1.3.2installation platform for four-axis aircraft-- rack

In the four-axis aircraft rack ( 1.14 equivalent to the body's skeleton, 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 Machine Frame

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

q provides a stable and robust platform for the whole. 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 provide 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