Research On Trajectory Planning Of Arrival Aircrafts In The Terminal Area

In recent years, with the rapid development of the economy and the scientific-technical progress, more and more people like to travel by plane. The scale of Airlines expands quickly, the number of flight increases sharply, and the industry of civil aviation develops rapidly. Which leads to serious air traffic congestion and a large number of flight delays. And which makes great economic losses and threatens the safety of normal operation of flights. Therefore, the concept of trajectory based operation which put forward by European and American developed countries in aviation area has attracted more and more attention. Because it can manage the airspace effectively with the condition of high density, big flow rate and small intervals. While the 4D trajectory planning is the foundation of trajectory based operation, and it can accelerate the implementation and application of Air Traffic Control automation and intellectualization in our country. Given this, this paper conducts a comprehensive and in-depth study for the approach 4D trajectory planning in the terminal area.Firstly, historical radar tracks were clustered and analyzed by Dynamic Time Warping algorithm and Hierarchical clustering upon which and standard arrival route a horizontal path can be designed.Secondly, two methods of velocity profile planning were analyzed deeply. In the first place, the speed profiles which satisfy the scheduled time of arrival(STA) were designed based on parameter optimization. The speed of aircraft at any waypoints and the position to decelerate between any two waypoints are determined by the parameterr?0 ?r ?1?. In the second place, a combination of aircraft kinematics model and meteorological model based velocity profile planning method was presented. The speed profiles which satisfy the scheduled time of arrival(STA) were designed based on the interaction between the trajectory generator and the speed adjustment parameter generator.Finally, taking arrival flights to Shanghai Pudong Airport as scenario, a simulation was conducted and the simulation result indicates that the proposed 4D trajectory planning method can make approach flights land punctually, reduce flight delays, accelerate the implementation of trajectory based operation(TBO) and improve the efficiency of the terminal airspace.