基于CTM的终端区交通流参数关系研究

为研究终端区空中交通流宏观时空特性及演变规律,利用时间离散的差分方程方法建立终端区进场交通流元胞传输模型,分析推导了交通流基本特性参数间的数理关系;借助NetLogo系统仿真平台对终端区进场交通流进行数据仿真与模拟推演,统计验证了交通流基本特性参数及其间相互关系,并利用真实雷达数据验证了仿真数据的可靠性;比较分析管制间隔对终端区空中交通流特性参数的影响规律。研究结果表明,进场交通流的速度与密度、速度与流量、流量与密度之间存在明显的相互影响关系,且管制临界密度与管制临界流量直接影响关系曲线拐点位置。

Research on Relationships among Terminal Traffic Flow Parameters Based on CTM

This paper studies the macroscopic time-space characteristics and evolution law of air traffic flow in terminal area .A cell transmission model for approach traffic flow is modeled by a method of time-discrete difference equation .The mathematical relationship of traffic flow basic parameters is analyzed and derived .Then the approach traffic flow in terminal area is simulated by the use of NetLogo simulation platform.The interrelationship of traffic flow basic parameters is verified by statistical analysis and real ra-dar data is taken as an important corroboration of simulation results .This paper also compares and analy-ses how relationships change when the flight separation is adjusted .The results show that the interrelation-ship of velocity-density,velocity-flow rate,and flow rate-density are obvious and change regularly .The inflection point of relation curve is directly influenced by controlling critical density and controlling criti-cal flow rate .