Unmanned aerial vehicle flight control system having multisensor redundant backup

Abstract

The invention relates to an unmanned aerial vehicle flight control system having multisensor redundant backup. The unmanned aerial vehicle flight control system can be used for multi-rotor unmanned aerial vehicles, helicopters and fixed wing unmanned aerial vehicles. The system is formed by a main control unit, a coprocessor unit, a sensor redundancy unit, a data exchange unit, a data recording unit and a power supply unit. The sensor redundancy unit is formed by multi-group gyroscopes, an accelerometer, a magnetometer, a magnetometer, a barometer and a satellite positioning system. A sensor fusion technology is applied, and when failures occur to a random single sensor, the sensor can be identified and isolated without causing influence on normal work of the flight control system. According to the unmanned aerial vehicle flight control system, on the premise that the increase of the flight control weight and the cost can be ignored relative to a whole, the reliability of the flight control system is greatly improved.

Description

technical field [0001] The invention relates to the field of unmanned aerial vehicle control, in particular to a multi-sensor redundant backup unmanned aerial vehicle flight control system. Background technique [0002] The UAV flight control system obtains the attitude, altitude, speed and position information of the aircraft by collecting the information of the sensor and performing the combined navigation attitude calculation, so as to control the aircraft to achieve manual stabilization or automatic flight. The sensors include a three-axis gyroscope, a three-axis accelerometer, a three-axis magnetometer, a barometer, and a satellite positioning system. The three-axis gyroscope is used to measure the angular velocity information in the three-axis direction of the aircraft body; the three-axis accelerometer is used to measure the acceleration information in the three-axis direction of the aircraft body; the three-axis magnetometer is used to measure the magnetic flux infor...

AI Technical Summary

Problems solved by technology

[0004] High-reliability sensors such as mechanical gyroscopes and fiber optic gyroscopes are heavy, bulky, and expensive, which limits their use on small UAVs

[0005] Most of the sensors that can be used on small UAVs are MEMS sensors, which are small in size, light in weight and low in cost, but have poor reliability

When a single sensor of the aircraft fails in the sky, it will have a fatal impact on the normal flight of the aircraft, ranging from ending the mission to an immediate forced landing, to causing a tragic crash

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