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Four-dimension Trajectory Planning Based on Scheduled Time of Arrival

LIU Jie;ZHANG Jun-feng;ZHU Hai-bo;MA Guang-hui;College of Civil Aviation,Nanjing University of Aeronautics and Astronautics;  
In order to accelerate the implementation and application of Air Traffic Control automation and intellectualization,a two-stage 4D trajectory planning method was presented,in which the horizontal path and altitude / speed profile were designed successively. Firstly,the horizontal path was designed through clustering and analysis of the historical radar tracks based on Dynamic Time Warping algorithm and Hierarchical clustering upon which a horizontal path can be designed. Then the velocity profile programming model was established,which is based on the interaction between the track generator and the speed regulator,to control the approach time finely to guarantee the scheduled time of arrival. Finally,taking arrival flights to Shanghai Pudong Airport from PINOT entry fix as examples,a simulation was conducted. And the simulation result indicates that the proposed 4D trajectory planning method is able to increase the arrival punctuality rate,reduce flight delays,and improve the operational efficiency in terminal airspace.
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