Research On System Of Dynamic Route Planning And Simulation For Taxiing Aircraft Based On 4D Trajectory

Due to the rapid development of China’s air transportation as well as the continuous expansion of domestic airport, airport surface will inevitably implement automatic guide and control, of which dynamic path planning for surface aircraft is an integral part, especially in complex airport environment and bad weather conditions. In this paper, the trajectory prediction model of ground taxiing aircraft is studied, coupled with the key technology of dynamic path planning, and the simulation system of taxiing aircraft dynamic path planning is established.The structure models of airport surface are established for static path planning algorithm. And in order to get the shortest taxiing distance, K static routes for aircraft taxiing from its start node to destination node are calculated as a feasible solution based on the A * algorithm.The method of predicting 4D trajectory for taxiing aircraft on airport surface based on fitting velocity profile is proposed, in which dynamic space warping(DSW) algorithm is applied to generate nominal velocity profile. Furthermore, the average velocity modification parameters are calculated to update taxiing velocity which is influenced by different aircraft types. According to a mapping between nominal velocity and instantaneous velocity based on the dynamic equilibrium equation, instantaneous velocity is updated combining with BADA data. Finally, aircraft taxiing 4D trajectory prediction is achieved. Case study demonstrates that the method can predict 4D trajectory effectively.The method of dynamic path planning for taxiing aircraft takes the K static routes as a feasible solution set. Then the conflict-free 4D trajectories, which meet the demand of surface activity control specification, are planned for each static preselected path based on the above prediction model. Finally, the optimal solution with the least operating time can be decided by computing and comparing the total taxiing times and waiting delays.The simulation system of taxiing aircraft dynamic path planning realizes trajectory prediction, dynamic path planning and the simulation of airport surface operation, through which its rationality, validity and instantaneity are verified. In a word, the system possesses the function of generating and parsing aircraft flow data based on CAT062 message format, then detecting route demands automatically and arranging paths correspondingly, at last, realizing the automatic routing on airport surface.