Dynamic Ground Taxi Optimization Based On Aircraft Priority At Large Airport

Airport is an important part of civil aviation transportation system.With the development of civil aviation transportation,the ground structure of large airports is becoming more and more complicated.The flow of air traffic is gradually increasing and the conflicts are increasing accordingly.The workload and difficulty of flight scheduling are increasing.At present,the fixed-path model is adopted in the aircraft taxiing scheduling of airport ground.When a conflict occurs,the conflict relief is accomplished by the first-come-first-serve(FCFS)approach,which has become the main factor restricting the efficiency of aircraft taxi scheduling.Therefore,based on the current airport layout,the use of new technologies to improve the aircraft ground scheduling,in order to achieve the improvement of its operational efficiency,which is China's civil aviation to achieve sustained and stable development of the need to focus on solving the problem.Based on the relevant researches both at home and abroad,this paper first proposes a strategy of taxi conflict resolution based on aircraft priority for the taxiway scheduling problem.Under the precondition of ensuring the priority of aircraft,the paper reasonably solves the conflict of taxi and improves the safety of operation effectiveness.Aiming at minimizing the taxiing costs of all incoming aircraft during the research period,a taxi optimization model based on the aircraft priority and taxi conflict resolution strategy was established.The D~* algorithm and the rolling horizon approach method are used to solve the model.The simulation results show that this optimization model can not only ensure the priority of aircraft,but also provide a safe and efficient taxi path for the aircraft.Compared to FCFS-based fixed-path taxiing,the total taxiing distance is reduced by 840 m and the total waiting time is reduced by 18 s.The number of conflict points is reduced by 26 compared to taxiing based on the ideal path.The method effectively improves the operation efficiency of the airport ground and increases the capacity of the ground.