The Study On Control Of Unmanned Air Vehicle Automatic Rendezvous In Aerial Refueling

For the load of unmanned aerial vehicle is small, the oil is little, foreign developed countriesbegan study the uav aerial refueling related technology. Autonomous rendezvous is one of the keytechnologies.This paper for the uav aerial refueling autonomous rendezvous guidance law and thereceiver aircraft flight control problem in-depth researching.First of all, according to data compiled structure and aerodynamic parameters of unmanned aerialvehicle (uav) to establish a six degrees of freedom nonlinear model of uav, and verified the horizontallateral movement of the natural characteristics analysis, validate the correctness of the mathematicalmodelSecondly, according to the relative position of the UAV and tanker design autonomousrendezvous guidance law and, depending on the situation at the beginning ends meet different designat the beginning end of the guidance law. And then design the height of the speed instruction andinstruction trace controller finally guided instructions and control instructions of the conversion..Third guidance system design is completed, need to design stable and accurate control system tocomplete the UAV pilot to accurately track and hold instruction. In this paper, based on the PIDcontrol law design methods, from many aspects of UAV altitude, speed, heading and other designUAV control law, thus completing the UAV trajectory and attitude control, to meet the requirements ofautonomy.Then the paper designed a model of atmospheric disturbances, the main consideration for UAVatmospheric interference Lateral through discrete gust model and the random interference laterallycontinuous turbulence model for the simulation of UAV designed crosswind disturbancecompensation control, a UAV control system to improve the ability to adapt to complex airspace.Finally, built in MATLAB software UAV aerial refueling autonomous rendezvous controlintegrated simulation platform. In the case of tanker rendezvous different flight strategies and bydifferent initial state oil machine, conducted a simulation autonomous rendezvous.Simulation results show that autonomous rendezvous control scheme designed to enableautonomous UAV rendezvous with the ability to control law designed to ensure stability on the basisof the UAVs to achieve accurate tracking pilot signals. Simulation results show the effectiveness ofthe proposed control scheme.