Flight control system and method for ship-borne unmanned aerial vehicle autonomous landing

Abstract

The invention discloses a flight control system and method for ship-borne unmanned aerial vehicle autonomous landing. The method comprises the steps that the precise height of an unmanned aerial vehicle can be obtained through data fusion of a laser height sensor and an atmospheric pressure altimeter, the relative positions of the unmanned aerial vehicle and a ship-borne platform can be obtained through a differential GPS, the ship-borne flight control system can work out the size of a flapped foil, the size of an elevator, the size of an accelerator and the size of a rudder according to the information and the expected flight path of the unmanned aerial vehicle, and the unmanned aerial vehicle is controlled to land according to the preset track. According to the control scheme, the height of the unmanned aerial vehicle can be obtained through data fusion of the laser height sensor and the atmospheric pressure altimeter; compared with a traditional atmospheric pressure altimeter, the height is measured more rapidly and more accurately; compared with a traditional single-input and single-output controller, a total energy control system with pitch angle negative feedback is adopted for the flight control law, and the height and the speed are more precisely controlled; compared with a total energy control system with no pitch angle negative feedback, the flight control system has the advantages that the glide and landing attitudes of the unmanned aerial vehicle can be controlled, and the flight safety of the unmanned aerial vehicle is ensured.

Description

technical field [0001] The invention relates to the field of flight control, in particular to a flight control system and method for autonomous landing of a ship-borne unmanned aerial vehicle. Background technique [0002] The successful landing of a UAV on an aircraft carrier is a very complex control task. Among them, the control of altitude and speed is the key to successful landing. Since the aircraft carrier has been moving forward and the speed is not fixed, the trajectory of the UAV's descent has been changing. In addition, unlike road-based aircraft, carrier-based aircraft keep the throttle at the maximum during the descent phase and the moment they touch the ship, the flight speed is faster, and the altitude drop rate is also larger. Therefore, the altitude control of the drone must be fast and accurate. In addition, in order to ensure that the main landing gear touches the ship first, the shipborne UAV needs to maintain a pitch angle greater than zero during the ...

AI Technical Summary

Problems solved by technology

In the existing documents that can be consulted, some use altitude to control the elevator, airspeed to control the throttle, some use altitude to control the throttle, and airspeed to control the elevator, and some introduce visual control, but these materials do not comprehensively consider altitude, airspeed As well as the pitching attitude of the aircraft, it cannot control the autonomous landing of the carrier-based drone very well.

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