Research On Area Coverage Algorithm Of UAV Airborne Wireless Ultraviolet Communication

In recent years,unmanned aerial vehicle(UAV)technology is rapidly changing the development of the world,from military use to commercial field to personal life,the application of UAV has been continuously expanded,such as target monitoring,emergency rescue,emergency communication,power inspection,water quality monitoring,video shooting,etc.Among the many applications,military applications are the most critical,providing the military with accurate and safe monitoring information,such as intelligence reconnaissance,communication relay,information confrontation,etc.In the face of a complex and changing battlefield environment,UAV systems have greater operational effectiveness and resistance to destruction.The wireless ultraviolet light in the "day-blind" band can use aerosol particles to achieve non-direct vision communication,and its confidentiality and environmental antiinterference ability,providing a reliable means of communication for UAV,providing a reliable communication guarantee for UAV in complex environments.This thesis addresses the problem of wireless ultraviolet optical communication assisting UAV area coverage in complex battlefield environment,and studies the UAV airborne wireless ultraviolet optical communication area coverage algorithm from static coverage and dynamic coverage perspectives based on wireless ultraviolet optical communication model and network coverage theory,respectively.The main research contents are as follows:(1)For the problem of multi-UAV-assisted ground user communication in complex electromagnetic environment,the UAV is used to carry wireless ultraviolet communication equipment for communication coverage of the target area.The method can combine the features of strong anti-jamming ability and high stealthiness of data transmission of wireless UV light,overcome the shortcomings of poor confidentiality of traditional radio,and establish a reliable of strong anti-jamming ability and high stealthiness of data transmission of wireless UV light,overcome the shortcomings of poor confidentiality of traditional radio,and establish a reliable and stealthy communication link for UAV and users while communication coverage.By establishing an airborne wireless UV non-direct vision communication model and UAV coverage model,and introducing three relative virtual forces,an improved virtual force coverage algorithm based on relative distance is proposed to control UAV movement,and the performance of the algorithm under different scenarios and the influence of UV communication angle on the coverage of the algorithm are simulated and analyzed.The simulation results show that the proposed algorithm reduces the invalid coverage and overlapping coverage,improves the coverage rate by 18.33%,3.15%and 1.83%compared with the random deployment algorithm,greedy virtual force algorithm and mobile deployment algorithm,respectively,and reduces the energy consumption of the UAV.(2)Aiming at the area coverage problem of UAV for reconnaissance and detection tasks in a large area,the UAV flight is guided by UV light,and the UV light power control method is given to assist UAV in matching different terrain flight.According to the flight characteristics of quadrotor UAV,the target area is rasterized,so that the actual area coverage task is transformed into a multi-UAV path planning problem in the raster map,and the constraints of multi-UAV area coverage task assignment are established,and the task assignment algorithm based on the initial position of UAV is proposed to evenly distribute the target area on the basis of achieving full coverage,taking into account the difference of multi-UAV endurance The proposed improved algorithm is more applicable to real application scenarios.The simulation results show the trend of power control changes in wireless UV-guided UAV flight,and the assignment results of the improved algorithm are basically consistent with the theoretical assignment results under the conditions of different parameters such as the number of UAV,initial position and endurance capacity.In summary,the UAV control algorithm used in this paper combined with wireless ultraviolet optical communication can satisfy the location optimization problem in multi-UAV area coverage of dynamic scenes as well as The free grids in the task area are reasonably assigned to each UAV according to the number of UAV,and then the sub-region coverage paths are planned for each UAV within the set of free grids assigned to each UAV,so that each UAV traverses all the assigned free grids under the premise of satisfying the task assignment constraints.