Research On Modeling Method Of Large UAV Collision Model

The UAV industry,as a new high-tech aviation industry,has a tremendous role in promoting the growth of the national economy.with the development of aviation technology in our country,gradually open airspace,the concept of free flight in flying environment is more and more complex,the airspace resources more and more nervous,the flight safety problem more and more serious,especially the quantity of UAV,poses a challenge to the flight safety problem.At present,UAV do not have mature autonomous perception and collision avoidance systems.In order to avoid possible conflicts,UAV generally use exclusive airspace during flight.However,in this way,it is difficult to fly in the same airspace with other UAV or with man-machine interaction,which causes a great waste of valuable airspace resources and seriously restricts the development of the UAV industry.With the rapid development of civil aviation and general aviation,airspace resources will become more and more precious.How to improve the utilization rate of airspace resources under the premise of ensuring the flight safety of UAV has become a new research hotspot.UAV collision model and risk classification method are developed based on this requirement.Firstly,the development status of unmanned aerial vehicles is analyzed,and the impact of the neglect of UAV control on general aviation is found through investigation.The importance of research on the flight safety of UAVs is emphasized,and the importance of research on the collision risk detection model applicable to UAVs is highlighted.Secondly,this paper introduces the theory of collision risk,and introduces the important significance of free flight to aviation field.This paper introduces the regulations of the international civil aviation organization on the corresponding safety flight interval,and details the relevant concepts of flight collision and flight conflict in detail.Then,it deeply analyzes the classic UAV collision model and EVENT collision model,including the establishment of collision box,collision model modeling method,collision probability calculation method,performance improvement comparison,etc.The traditional EVENT collision model was improved,and the improved EVENT model with the combined shape of cylinder and cuboid as the new collision template was established.The flight collision risk of the modified EVENT model was analyzed in the longitudinal,lateral and vertical directions respectively,and its parameter algorithm was studied.Then,a new type of collision model that meets the characteristics of UAV flight is presented,based on the four-dimensional drone collision model,the spatial 3d coordinate and real-time speed information of the aircraft and the intrusion machine are analyzed,and the possibility of the flight collision of the UAV is analyzed,and the feasibility of the UAV is simulated.Finally,a method of UAV dynamic collision box modeling is proposed to improve the traditional fixed flight collision box into dynamic change collision box,so as to make the calculation of UAV flight collision probability more practical,improve UAV flight safety and increase the utilization rate of airspace.