Research On Wireless Charging System Of UAV Cluster

The problem of UAV's power supply and endurance is the main factor that limits the performance of UAV.Wireless charging technology can provide flexible and convenient power supply for UAV without human intervention,so it has a broad application prospect.With the continuous expansion of the application field,the ability of task execution of a single UAV is limited,which has been unable to meet the needs of some scenarios.However,the UAV cluster can achieve higher operational objectives through the cooperation of multiple UAVs.However,there are some problems in the wireless charging system of UAV cluster,such as the coupling between coils,the change of load,the change of resonance parameters and so on.Based on the above research background,this paper studies the wireless charging system of multiple UAVs.Firstly,based on the analysis of the characteristics of UAV cluster wireless charging system,this paper puts forward the circuit structure of multi UAV wireless charging system.In terms of resonant compensation topology,the working characteristics of different circuit compensation topologies are analyzed,and the output power and efficiency of lcc-s compensation system are mainly studied,and the transmission efficiency and power of the system and its influence are analyzed The relationship between the factors and the system control conditions which make the system work in the maximum efficiency state are obtained,which provides the corresponding guidance for the design of the control method of the secondary system.In order to maintain the control objective of the maximum efficiency in the charging cycle of the system,a compensation control method based on the secondary PWM rectifier is proposed.The working principle of the proposed compensation control method is analyzed.It is pointed out that the two control degrees of freedom of the secondary PWM rectifier can be used to achieve the control objective of the secondary coupling compensation and the optimal load regulation of the system,and the system model and control parameters are set The control method proposed in this paper is analyzed and modeled and simulated by Matlab / Simulink,which verifies the correctness and feasibility of the control method proposed in this paper.Finally,combining theory with practice,the paper designs every link of UAV wireless charging system,including the original secondary side power converter,drive control and signal circuit,the original secondary side coupling mechanism and resonance topology,and builds the overall experimental platform of the system,completes the system resonance matching,and verifies the system structure,model establishment and system design method through system simulation and experiment...