基于混杂系统模型的航空器4D航迹推测

为实现对未来大流量、高密度、小间隔条件下空域实施管理,4D航迹推测是国内新一代空管自动化系统最为核心的一项技术。首先基于飞行剖面不同飞行阶段的航空器动力学模型,构造了在不同飞行阶段之间转移,而在同一阶段航空器重量、校正空速、高度和距离等状态连续变化的混杂系统模型。通过温度和风速风向修正航空器真空速及地速,利用混杂系统递推法求解航空器4D航迹。实际算例表明,本文提出的混杂系统模型推测得到的水平航迹和垂直剖面能够准确地反映航空器的飞行状态变化,单架航空器4D航迹推测计算时间可以控制在2 s以内。

Aircraft 4D Trajectory Estimation Based on Hybrid System Model

To resolve the problem of future airspace management under the condition of great traffic flow,high density,and small separation,four-dimentional(4D) trajectory estimation becomes one of the core technologies for next new generation automatic air traffic control system.According to the given flight profile and the aero-dynamics models under different flight conditions,a hybrid system model is constructed with the feature that state switches between different flight stages,while but aircraft weight,calibrated airspeed,altitude and distance change continuously in the same stage.Air temperature,wind speed and wind direction are used to modify the true airspeed and ground speed of the aircraft.The hybrid system simulation is used to solve aircraft 4D trajectory.Case study proves that horizontal and vertical aircraft trajectory estimated through hybrid system can image the flight dynamic state of the given aircraft.In addition,the time cost of trajectory computation for one aircraft can be limited within 2 s.