Airports are being developed and expanded rapidly in China to accommodate and promote a growing aviation market.The future Beijing Daxing International Airport（DAX） will serve as the central airport of the JingJinJi...Airports are being developed and expanded rapidly in China to accommodate and promote a growing aviation market.The future Beijing Daxing International Airport（DAX） will serve as the central airport of the JingJinJi megaregion,knitting the Beijing,Tianjin,and Hebei regions together.DAX will be a busy airport from its inception,relieving congestion and accommodating growth from Beijing Capital International Airport（PEK）,currently the second busiest airport in the world in passengers moved.We aim to model terminal airspace designs and possible conflicts in the future Beijing Multi-Airport System（MAS）.We investigate standard arrival procedures and mathematically model current and future arrival trajectories into PEK and DAX by collecting large quantities of publicly available track data from historical arrivals operating within the Beijing terminal airspace.We find that（1） trajectory models constructed from real data capture aberrations and deviations from standard arrival procedures,validating the need to incorporate data on historical trajectories with standard procedures when evaluating the airspace and（2） given all existing constraints,DAX may be restricted to using north and east arrival flows,constraining the capacity required to handle the increases in air traffic demand to Beijing.The results indicate that the terminal airspace above Beijing,and the future JingJinJi region,requires careful consideration if the full capacity benefits of the two major airports are to be realized.展开更多
Airspace safety and airport capacity are two key challenges to sustain the growth in Air Transportation. In this paper, we model the Air Transportation Network as two sub-networks of airspace and airports, such that t...Airspace safety and airport capacity are two key challenges to sustain the growth in Air Transportation. In this paper, we model the Air Transportation Network as two sub-networks of airspace and airports, such that the safety and capacity of the overall Air Transportation network emerge from the interaction between the two. We propose a safety-capacity trade-off approach,using a computational framework, where the two networks can inter-act and the trade-off between capacity and safety in an Air Transport Network can be established. The framework comprise of an evolutionary computation based air traffic scenario generation using a flow capacity estimation module(for capacity), Collision risk estimation module(for safety) and an air traffic simulation module(for evaluation). The proposed methodology to evolve air traffic scenarios such that it minimizes collision risk for given capacity estimation was tested on two different air transport network topologies(random and small-world) with the same number of airports. Experimental results indicate that though airspace collision risk increases almost linearly with the increasing flow(flow intensity) in the corresponding airport network, the critical flow depend on the underlying network configuration. It was also found that, in general, the capacity upper bound depends not only on the connectivity among airports and their individual performances but also the configuration of waypoints and mid-air interactions among conflicts. Results also show that airport network can accommodate more traffic in terms of capacity but the corresponding airspace network cannot accommodate the resulting traffic flow due to the bounds on collision risk.展开更多
为了减少大型繁忙机场场面拥堵与航班延误,对处于机场终端区的航班进行预先战术性的滑行路径动态优化。首先,对处于机场终端区的航班划分时间窗口,对航班集合进行分类,使用改进Dijkstra算法对需要路径优化的航班进行动态规划。改进Dijks...为了减少大型繁忙机场场面拥堵与航班延误,对处于机场终端区的航班进行预先战术性的滑行路径动态优化。首先,对处于机场终端区的航班划分时间窗口,对航班集合进行分类,使用改进Dijkstra算法对需要路径优化的航班进行动态规划。改进Dijkstra算法是将整个时间进程分成多个连续滚动的时间片,在每个时间片中,以场面节点的时间当量长度总和最小为优化目标,采用传统Dijkstra算法思想,获得每个航班的最优滑行路径解。其次,在TAAM(total airspace and airport modeller)仿真软件中利用Matlab编程实现算法,并以实际机场为例验证算法正确性。实验结果证明:改进Dijkstra算法能有效减少滑行冲突,提高滑行效率,缩短机场航班延误时间。展开更多
本文建立了停机位分配的多商品网络流模型,并以航空器总场面运行时间最小为目标,建立数学模型。将机场场面分为若干区域,建立区域—机位两级分配策略,以降低问题规模。设置机位外等待时间,以省去区域容量相关约束。在传统粒子群算法的...本文建立了停机位分配的多商品网络流模型,并以航空器总场面运行时间最小为目标,建立数学模型。将机场场面分为若干区域,建立区域—机位两级分配策略,以降低问题规模。设置机位外等待时间,以省去区域容量相关约束。在传统粒子群算法的基础上,设计离散粒子群算法,对模型进行求解。选取乌鲁木齐机场某日240架航班和109个机位进行实验,证明了与现有研究中的典型模型相比,多商品网络流模型能使运算时间减少10.1%,并能达到与典型模型相同的精度。全空域和机场模型(total airspace and airport modeller,TAAM)仿真结果表明,和现行机位分配方案相比,多商品网络流模型的机位分配结果能使航空器的场面调配运行时间减少7.49%,延误时间减少8.87%。算例结果进一步表明,提高机场场面运行效率的关键在于均衡航班的进离港滑行距离,同时避免停机位密集分布。展开更多
针对实施机位分配方案时间执行偏差较大的问题,探讨使用全空域与机场建模工具(TAAM,total airspace and airport modeller)模拟场面实际运行缩减机位时间执行偏差的可行性。以旅客总行走时间、总机位占用不均衡度、各航空公司航空器平...针对实施机位分配方案时间执行偏差较大的问题,探讨使用全空域与机场建模工具(TAAM,total airspace and airport modeller)模拟场面实际运行缩减机位时间执行偏差的可行性。以旅客总行走时间、总机位占用不均衡度、各航空公司航空器平均滑行距离均衡为目标建立模型,采用TAAM仿真工具优化机位计划运行时间并取得初始机位分配方案,通过熵权法将多目标问题转化为单目标问题,并使用禁忌搜索算法求解模型。仿真验证机位运行时间优化前后的时间执行偏差,结果显示,机位运行时间经过优化之后,机位时间执行偏差明显改善,有效地提高了机位运行效率。展开更多
为了降低航班延误造成的经济损失和旅客滞留,在不增加管制员工作负荷的基础上提高航班运行效率。在原有的航班恢复模型基础上,引入跑道容量模型,综合考虑旅客流、航空公司公平性以及航线重要程度的影响,建立以各单位恢复总成本最小为目...为了降低航班延误造成的经济损失和旅客滞留,在不增加管制员工作负荷的基础上提高航班运行效率。在原有的航班恢复模型基础上,引入跑道容量模型,综合考虑旅客流、航空公司公平性以及航线重要程度的影响,建立以各单位恢复总成本最小为目标函数的航班恢复模型,该模型适用于跑道数以及构型不同的单一机场,算例中引用中国某机场的真实延误数据,并用遗传算法和粒子群算法求解模型得到优化方案,与遗传算法相比,粒子群算法更适用于该模型,收敛速度更快。与现有的航班运行相对比,优化后的方案总延误时间缩短了11.85%,总延误成本减少了6.55%。最后用TAAM(total airspace and airport modeller)仿真软件分别运行实际恢复方案和优化恢复方案,报告显示优化方案中终端区产生冲突的可能性更小,管制员工作负荷更低,从而验证了模型和算法的可用性。展开更多
文摘Airports are being developed and expanded rapidly in China to accommodate and promote a growing aviation market.The future Beijing Daxing International Airport（DAX） will serve as the central airport of the JingJinJi megaregion,knitting the Beijing,Tianjin,and Hebei regions together.DAX will be a busy airport from its inception,relieving congestion and accommodating growth from Beijing Capital International Airport（PEK）,currently the second busiest airport in the world in passengers moved.We aim to model terminal airspace designs and possible conflicts in the future Beijing Multi-Airport System（MAS）.We investigate standard arrival procedures and mathematically model current and future arrival trajectories into PEK and DAX by collecting large quantities of publicly available track data from historical arrivals operating within the Beijing terminal airspace.We find that（1） trajectory models constructed from real data capture aberrations and deviations from standard arrival procedures,validating the need to incorporate data on historical trajectories with standard procedures when evaluating the airspace and（2） given all existing constraints,DAX may be restricted to using north and east arrival flows,constraining the capacity required to handle the increases in air traffic demand to Beijing.The results indicate that the terminal airspace above Beijing,and the future JingJinJi region,requires careful consideration if the full capacity benefits of the two major airports are to be realized.
文摘Airspace safety and airport capacity are two key challenges to sustain the growth in Air Transportation. In this paper, we model the Air Transportation Network as two sub-networks of airspace and airports, such that the safety and capacity of the overall Air Transportation network emerge from the interaction between the two. We propose a safety-capacity trade-off approach,using a computational framework, where the two networks can inter-act and the trade-off between capacity and safety in an Air Transport Network can be established. The framework comprise of an evolutionary computation based air traffic scenario generation using a flow capacity estimation module(for capacity), Collision risk estimation module(for safety) and an air traffic simulation module(for evaluation). The proposed methodology to evolve air traffic scenarios such that it minimizes collision risk for given capacity estimation was tested on two different air transport network topologies(random and small-world) with the same number of airports. Experimental results indicate that though airspace collision risk increases almost linearly with the increasing flow(flow intensity) in the corresponding airport network, the critical flow depend on the underlying network configuration. It was also found that, in general, the capacity upper bound depends not only on the connectivity among airports and their individual performances but also the configuration of waypoints and mid-air interactions among conflicts. Results also show that airport network can accommodate more traffic in terms of capacity but the corresponding airspace network cannot accommodate the resulting traffic flow due to the bounds on collision risk.
文摘为了减少大型繁忙机场场面拥堵与航班延误,对处于机场终端区的航班进行预先战术性的滑行路径动态优化。首先,对处于机场终端区的航班划分时间窗口,对航班集合进行分类,使用改进Dijkstra算法对需要路径优化的航班进行动态规划。改进Dijkstra算法是将整个时间进程分成多个连续滚动的时间片,在每个时间片中,以场面节点的时间当量长度总和最小为优化目标,采用传统Dijkstra算法思想,获得每个航班的最优滑行路径解。其次,在TAAM(total airspace and airport modeller)仿真软件中利用Matlab编程实现算法,并以实际机场为例验证算法正确性。实验结果证明:改进Dijkstra算法能有效减少滑行冲突,提高滑行效率,缩短机场航班延误时间。
文摘本文建立了停机位分配的多商品网络流模型,并以航空器总场面运行时间最小为目标,建立数学模型。将机场场面分为若干区域,建立区域—机位两级分配策略,以降低问题规模。设置机位外等待时间,以省去区域容量相关约束。在传统粒子群算法的基础上,设计离散粒子群算法,对模型进行求解。选取乌鲁木齐机场某日240架航班和109个机位进行实验,证明了与现有研究中的典型模型相比,多商品网络流模型能使运算时间减少10.1%,并能达到与典型模型相同的精度。全空域和机场模型(total airspace and airport modeller,TAAM)仿真结果表明,和现行机位分配方案相比,多商品网络流模型的机位分配结果能使航空器的场面调配运行时间减少7.49%,延误时间减少8.87%。算例结果进一步表明,提高机场场面运行效率的关键在于均衡航班的进离港滑行距离,同时避免停机位密集分布。
文摘针对实施机位分配方案时间执行偏差较大的问题,探讨使用全空域与机场建模工具(TAAM,total airspace and airport modeller)模拟场面实际运行缩减机位时间执行偏差的可行性。以旅客总行走时间、总机位占用不均衡度、各航空公司航空器平均滑行距离均衡为目标建立模型,采用TAAM仿真工具优化机位计划运行时间并取得初始机位分配方案,通过熵权法将多目标问题转化为单目标问题,并使用禁忌搜索算法求解模型。仿真验证机位运行时间优化前后的时间执行偏差,结果显示,机位运行时间经过优化之后,机位时间执行偏差明显改善,有效地提高了机位运行效率。
文摘为了降低航班延误造成的经济损失和旅客滞留,在不增加管制员工作负荷的基础上提高航班运行效率。在原有的航班恢复模型基础上,引入跑道容量模型,综合考虑旅客流、航空公司公平性以及航线重要程度的影响,建立以各单位恢复总成本最小为目标函数的航班恢复模型,该模型适用于跑道数以及构型不同的单一机场,算例中引用中国某机场的真实延误数据,并用遗传算法和粒子群算法求解模型得到优化方案,与遗传算法相比,粒子群算法更适用于该模型,收敛速度更快。与现有的航班运行相对比,优化后的方案总延误时间缩短了11.85%,总延误成本减少了6.55%。最后用TAAM(total airspace and airport modeller)仿真软件分别运行实际恢复方案和优化恢复方案,报告显示优化方案中终端区产生冲突的可能性更小,管制员工作负荷更低,从而验证了模型和算法的可用性。
