The so-called flight control system is the flight control system, which is the core system of the whole flight process of the drone to complete take-off, air flight, mission execution and return-to-field recovery, including sensors, airborne computers and servo-operated devices. .
The flying friends who have played the drone know that there is a very important component in the flight control called the electronic compass (magnetic compass). The principle is similar to that of the compass. It can measure the current equipment in the north and southwest directions. The angle (causing the aircraft not to fly), many drones will prompt to calibrate the magnetic compass before take-off; and the magnetic compass-based directional navigation is susceptible to interference, the earth's magnetic field is too weak. UAVs are susceptible to magnetic interference caused by their own large currents, and external influences include high-voltage lines and underground metal mines. In theory, a geomagnetic compass error will not cause a crash, it will only cause the GPS to hover or the aircraft will fly further and further in the wrong direction.
In a slightly larger size drone, it can be solved. For example, in the plant protection drone, the dual RTK direction is not commonly used for the orientation of the magnetic compass. The dual RTK antenna is installed on the drone with a distance of 20 cm or more, based on the positioning coordinates. The difference can be oriented. It is believed that the manned aircraft in the flight control will be more sophisticated than other industrial drones.