Research On Carrier Longitudinal Landing Control Of The Flying-wing UAV Based On Model Predictive Control

Flying wing layout UAV aerodynamic characteristics are: flat shape,no flat tail and vertical tail,so the relative longitudinal layout of the UAV longitudinal stability is poor,while the longitudinal control of the rudder surface is relatively low efficiency.Modern aircraft carrier carrier has entered the intelligent unmanned,stealth era,flying wing layout UAV special pneumatic layout,so that it is very good to meet the modern aircraft carrier on the carrier aircraft combat platform tactical requirements.But the flying wing unmanned aircraft landing control more difficult than the conventional layout of the carrier-based aircraft,especially the vertical landing control.In this paper,we study the vertical shipboard control technology of the conventional layout carrier based on the aircraft carrier flight deck,and design the vertical guided guidance law of the flying wing unmanned aerial vehicle and the longitudinal landing control law based on the model predictive control theory.Man-machine in the aircraft carrier complex landing environment,the vertical landing control of the safety and accuracy issues.This paper analyzes the complex landing environment of the aircraft carrier,and uses the simulation results to verify the influence of the speed of the aircraft carrier sailing on the accuracy of the flying wing unmanned aerial vehicle on its deck.With reference to the carrier-based aircraft in the complex aircraft carrier landing environment in the landing track and control requirements,combined with flying wing UAV special aerodynamic layout and modal characteristics shown by the maneuverability and mobility,design flying wing UAV Landing down the track,including the approach of flying and down the guide.Based on the modeling of the flying wing unmanned aerial vehicle and the aircraft carrier landing environment,combined with the requirements of the control airspeed and altitude for each stage of the landing trajectory,considering the vertical landing control requirements of the flying wing unmanned aerial vehicle,The model predicts the theoretical design of a controller that meets the requirements of the flight landing trajectory.In this paper,the control strategy of the wingless UAV longitudinal control system is to increase the resistance of the left and right side of the cracked rudder by 60 °,and use the engine to control the airspeed.The elevator controls the height of the flying wing unmanned aerial vehicle.On this basis,the longitudinal airspeed and the height controller are designed based on the model predictive control theory respectively,and the dynamic tracing of the flying trajectory of the flying wing unmanned aerial vehicle and the ideal landing point of the carrier deck are realized.Finally,the application of flying wing unmanned aerial vehicle landing simulation environment,flying wing unmanned aircraft landing by a variety of disturbances,such as the ship flow wind farm,aircraft carrier deck simulation simulation.The simulation results show that the design of the vertical landing airspeed and the height controller satisfies the requirements of the flying trajectory control of the flying wing UAV.The vertical landing control system has certain robustness and accuracy.