Design And Implementation Of 4G Network UAV Control

In recent years,the market of the civilian unmanned aerial vehicle(UAV)has developed rapidly.The smal-sized UAV has the characteristics of simple structure and operation,which applied to a plurality of fields.However,there is a lack of effective management and supervision system in the UAV industry,and the accidents caused by the UAV are becoming more and more frequent.In order to solve the problems existing in the UAV industry,it is necessary to perfect the industry norms and airworthiness regulations to restrict the airspace range of UAVs.On this basis,the civil UAV supervision system should be constructed,and the UAVs in the airspace need to be supervised by technical means.But the smal-sized UAVs have the problems such as lack of wireless channel resources and limit communication distance and so on,which brings the challenge to the unified supervision of UAVs.Under the background of building the civilian UAV monitoring platform,this paper analyzes the development status of small UAV control stations and their communication links,and clarifies the research direction and problems that need to be solved to connect UAVs to TD-LTE networks.Secondly,the related technologies involved in the realization of 4G network drone control are introduced.On this basis,this paper proposes a system architecture with UAV,ground control station and TD-LTE communication bearer network as the core,and gives the system function module division and software thread control design.After that,the UAV simulation flight test platform was built to simulate the flight control function.According to the test results,the problems of the system control mechanism and emergency measures were analyzed,the control flow of UAV is improved by self-defined communication protocol,the real-time communication of UAV is guaranteed by continuous control instruction mechanism,and the control command is used to describe the flight trajectory that the UAV can return normally without GPS signal.Finally,build a test environment and design test plan based on the flight characteristics of the drone.The actual flight test is used to test the flight control function of UAV,and simulate flight test is used to verify the performance of UAV in poor or extreme network environment.The final result shows that the whole system meets the design requirements.The work of this paper is summarized as fol ows.Firstly,this paper analyzes the development status of small UAV control stations and their communication links,and clarifies the research direction and problems that need to be solved to connect UAVs to TD-LTE networks.Secondly,the related technologies involved in the realization of 4G network drone control are introduced.On this basis,this paper proposes a system architecture with UAV,ground control station and TD-LTE communication bearer network as the core,and gives the system function module division and software thread control design.After that,the UAV simulation flight test platform was built to simulate the flight control function.According to the test results,the problems of the system control mechanism and emergency measures were analyzed,the control flow of UAV is improved by self-defined communication protocol,the real-time communication of UAV is guaranteed by continuous control instruction mechanism,and the control command is used to describe the flight trajectory that the UAV can return normally without GPS signal.