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What is the principle of the UAV flight control system?

What is the composition of a drone? Do the little friends who are new to drones have a lot of questions? After summing up the following knowledge, let's take a look.

1. Flight control: the full name is the flight control system

The flight control system is commonly known as flight control, which can be used to ensure the stability and maneuverability of the aircraft, improve the ability to complete tasks and flight quality, enhance flight safety and reduce the burden on the pilot. The classification of flight control systems has different classification methods from different perspectives. According to the control command issued by the pilot, the other is the automatic flight control system, the control command is automatically generated by the system itself. The aircraft’s pitch, roll and yaw control, lift and drag control, manual trim, direct force control and other changes in aircraft configuration control (such as changing the wing sweep angle, horizontal stabilizer installation angle, etc.), it It is an integral part of the aircraft, so it also belongs to the flight control system.

2. Common drone flight sensors


Electronic compass (magnetometer)

GPS (Global Positioning System)



3. So what is their principle?


Based on the theory of conservation of angular momentum, a high-speed rotating body's momentum-sensitive shell is used to detect the angular movement of one or two axes orthogonal to the rotation axis relative to the inertial space. The gyroscope is very sensitive to tiny rotations, so it plays an important role in the control of the aircraft's flight attitude. The aircraft can automatically correct it with a little deflection. In simple terms, the gyroscope helps the aircraft maintain a stable attitude, so And the flight of the gyroscope is stable.

Electronic compass magnetometer

The electronic compass magnetometer is also called geomagnetism or magnetic sensor. It can be used to test the strength and direction of the magnetic field, and to locate the device's position. The principle of the magnetometer is similar to that of the compass.


GPS is the abbreviation of English Global Positioning System (Global Positioning System). GPS started as a project of the US military in 1958 and was put into use in 1964. In the 1970s, the United States Army, Navy and Air Force jointly developed a new generation of satellite positioning system GPS. The main purpose is to provide real-time, all-weather and global navigation services for the three major areas of land, sea and air, and for military purposes such as intelligence collection, nuclear explosion monitoring and emergency communications. After more than 20 years of research and experimentation, it cost 30 billion US dollars. By 1994 , 24 GPS satellite constellations with a global coverage rate of 98% have been deployed. Generally, a geomagnetic compass (three-axis magnetometer) is also included in the GPS module: to measure the current heading of the aircraft.


Acceleration sensor is a sensor that can measure acceleration. During acceleration, the sensor uses Newton's second law to obtain the acceleration value by measuring the inertial force received by the mass.


Barometer, a device that detects the current altitude based on atmospheric pressure.

To master the flying skills, you need to master the basic elements as the basis, and continue to practice, and finally realize your own control of the aircraft start, approach, take-off, route and landing. To reach this state, the model industry calls it "single flight." 

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