Research On Aircraft Collision Risk In Ground Proximity Based On Wake Separation

In recent years,in order to solve the problems of airport and airspace capacity saturation and low operation efficiency caused by the rapid development of the air transport industry,domestic and foreign scholars have conducted a lot of research on the runway operation mode and wake separation reduction technology.In the process of research,in order to ensure the safety of civil aviation operations and avoid conflicts and collisions between aircraft,it is necessary to analyze the collision risk of aircraft in the ground proximity.In this thesis,take Chongqing Jiangbei Inter-national Airport as an example to studies and improves the collision risk model in the ground proximity,and analyzes the collision risk under different wake separation.The main work is as follows:Firstly,the shortcomings of the traditional Reich model are analyzed,and the collision template of the traditional Reich model is optimized through the bounding box idea in the collision detection technology.Secondly,based on the optimized collision model,the runway operation characteristics and the factors affecting the collision risk are considered,combined with geometric methods and knowledge of probability calculus,the longitudinal,lateral and vertical collision models for paired approach with closely spaced parallel runways and relevant parallel approaches.Taked Chongqing Jiangbei International Airport as an example,the simulation calculation of paired approach with closely spaced parallel runways is carried out,and the calculation results are compared with traditional Reich model.Finally,based on the established relevant parallel approach collision risk model,the collision risk assessment of six wake separation is carried out,and designed the relevant parallel approach collision risk calculation software.In contrast,the volume and shape of the optimized collision model are more consistent with the aircraft;under the same operating conditions and met the safety target level of1.5×10^-8times/flight hour,the collision risk calculated by the optimized collision model in this thesis is smaller,which is about 85%of the collision risk of the traditional Reich model,and the safety margin is larger;through the optimized collision model in this thesis,different wake separation are evaluated,the wake separation calculated by numerical simulation has been further reduced.and the collision risk met the safety target level 1.5×10^-8times/flight hour,the wake separation reduction range is 56～4662m,which can greatly improve the operation efficiency of busy airports and provide theoretical support for the future research on reducing wake separation...