Research on the Characteristic of Optimal FlightRoute in the Terminal Area

A method named multi-times optimization is presented to solve the multi-specification optimization problem,which is difficult to solve using the variational optimal theory.In the method several demands are reduced to some sub-tasks.In every subtask a demand that can not be transformed into bound condition is taken as performance specification for optimazation,and the other demands are taken as bound conditions.By means of the method,the arrival time,number of turn,turn angle of the aircraft in the terminal area are selected as performance specification separately,and the general character of optimal flight route in the terminal area is given.