Research On Wireless Laser Tracking And Energy Transmission System Of UAV

In this paper,the wireless laser tracking and energy transmission system of UAV is studied.The laser charging system of UAV includes comprehensive technologies in various fields.The laser charging system of UAV can achieve high efficiency and precision through reference and system related requirements.In the MATLAB / Simulink simulation platform and example verification,the proposed tracking and aiming strategy is verified by simulation.The main work of this paper is as follows:Firstly,through apt technology,the laser can guarantee the UAV’s endurance in advance.The tracking system is divided into two parts: rough tracking and precise tracking.First,the reflected laser beacon light is captured by rough tracking,and then the precise tracking system is introduced to reduce the tracking residual and make the tracking accuracy meet the requirements.A laser tracking and aiming algorithm based on Kalman prediction filter is proposed.When the coarse tracking axis is adjusted to the fine tracking axis,the coordinate position obtained from the calculation method of CDD facula center is predicted by Kalman prediction filter algorithm,and the optimal prediction value of the next facula is predicted.According to the optimal prediction value,the miss distance of azimuth and pitch direction is calculated.The output speed and tracking accuracy of miss distance are improved by the process of "correction prediction correction".Secondly,starting from the tracking and aiming of UAV under special circumstances,when the UAV needs to be charged under normal circumstances,the UAV will return to the predetermined airspace actively for charging,and the distance between the ground laser launching device and the UAV is moderate and convenient for charging.Most of the existing cooperative target tracking and aiming methods of laser wireless energy transmission system rely on the combination of angle reflector,led and CCD to achieve accurate aiming.When the UAV encounters special circumstances and the supply station is inconvenient to move,it needs to charge the UAV through the laser ultra long distance.In this case,the size of laser spot may completely cover the photovoltaic panel.To solve this problem,a new tracking and aiming method is proposed.The validity of the method is proved by an example.So that the laser charging system is more perfect.Finally,this paper introduces the composition and working principle of the UAV remote laser charging system,and gives the UAV long-time working mode.The whole charging process of laser powered UAV is explained,and its main key technologies are put forward in two aspects: the technology of laser launching and receiving and the technology of apt of laser charging system.The conversion efficiency of UAV charging system is analyzed in detail,which is the basis of designing a high efficiency laser charging system for UAV.