A new paradigm for building an Eulerian-Lagrangian cell transmission model air traffic flow is developed. It based on aggregation of track data and applied to the full National Airspace System in United States. The a multicommodity network constructed from historical data. reduced linear time invariant dynamical system, which state vector aggregate aircraft counts. This called large-capacity reference highway traffic, inspired this work. predictive capabilities are successfully validated...

A semi-automated method has been developed for calibrating the parameters of a modified version Daganzo's cell transmission model (CTM). least-squares data fitting approach was applied to loop detector determine free-flow speeds, congestion-wave and jam densities specified subsections freeway segment. Bottleneck capacities were estimated from measured mainline on-ramp flows. The calibration tested on 14-mile portion Interstate 210 Westbound in southern California. calibrated CTM able...

The continuous growth of air traffic demand, skyrocketing fuel price, and increasing concerns on safety environmental impact transportation necessitate the modernization management (ATM) system in United States. design such a large-scale networked that involves complex interactions among automation human operators poses new challenges for many engineering fields. This paper investigates several important facets future ATM from systems-level point view. In particular, we develop hierarchical...

This paper performs further improvement to a distributed algorithm for solving linear algebraic equations via multi-agent networks recently developed by Mou et al., in which all agents' states converge exponentially fast the same solution group of assuming each agent knows only part and its nearby neighbors' states. We first prove that proposed al. with special initialization is able achieve closest given point Euclidean distance. Second, we eliminate required step used modification update...

Chance-constrained optimization provides a promi- sing framework for solving control and planning problems with uncertainties, due to its modeling capability capture randomness in real-world applications. In this paper, we consider UAV trajectory problem probabilistic geo-fence, building on the chance-constrained approach. considered problem, of model, such as uncertain boundaries geo-fences, is incorporated formulation. By formulated novel sampling based solution method, optimal achieved...

A method for partitioning airspace into smaller regions based on a peak traffic-counts metric is described. The three setup steps consist of 1) creating network flow graph, 2) an occupancy grid composed cells specified size discretizing the and 3) assigning to nodes graph. Both cell assignment are computationally realized using matrices. During run phase method, graph partitioned its two sub-graphs these then their sub-graphs, so till termination criterion met. Weights computed by summing...

It is necessary to design a robust air transportation network. An experiment based on the real network performed show that algebraic connectivity fair measure for robustness under random failures. Therefor, goal of this paper maximize connectivity. Some researchers solve maximization by choosing weights edges in graph. Others focus best way add order optimize In paper, authors formulate new model and corresponding optimization problem interesting because two subproblems adding edge cannot be...

The continuous-descent approach is among the key concepts of Next Generation Air Transportation System. Although a considerable number researchers have been devoted to estimation potential fuel savings approach, few attempted explain observed in field tests from an analytical point view. This paper focuses on evaluation as fuel-reduction procedure. research gives insights into reasons why saves fuel, and design guidelines for continuous-descent-approach procedures are derived. relationship...

Air taxi services have the potential to revolutionize metropolitan transportation by integrating with ground systems reduce number of vehicles required, greenhouse gas emissions, and improve economic viability network companies. However, most studies address vehicle assignment scheduling problems separately, limited focus on jointly optimizing these in multimodal systems. Additionally, challenges specific air ridesharing, such as energy optimization across flight phases integration...

Parallel Kinematic Machines (PKMs) have many advantages and been widely used in the machine industry. Benefitting from its modular structure, a PKM is more reconfigurable than traditional serial machines. In this paper, new type of driving strut module innovative joints are designed for Reconfigurable Machine (RPKM). The can be changed linear drive mode to telescopic easily, spherical joint universal achieve large rotation angle. inverse kinematics problems relation 6-DOF RPKM analysed,...

Four Eulerian network models are implemented to model high altitude air traffic flow. Three of the use framework discrete time dynamical systems, while fourth consists a partial differential equations. The construction these is done using one year data. four applied for six Air Route Traffic Control Centers in National Airspace System and surrounding airspace. Simulations carried out full day data each models, assess their predictive capabilities. models' predictions compared recorded flight...

solution with the dual decomposition method converges to global optimum. The major contribution of proposed modeling and optimization framework is that it about 6 times faster than a previously developed largecapacity cell transmission model. It also shown obtains an equally optimal as large-capacity In meantime, model capable including bothgrounddelayandairbornedelay,whilethelarge-capacitycelltransmissionmodelincludesairbornedelayonly. traffic forecasting capability new examined...

In this paper, we address the issue of congestion in future Unmanned Aerial Vehicle (UAVs) traffic system uncertain weather. We treat UAVs as fluid queues, and introduce models for dynamics at three basic components: single link, tandem merge link. The impact weather uncertainty is captured fluctuation saturation rate queue discharge (capacity). assumed to follow a continuous-time Markov process. define resilience UAV long-run stability queues optimal throughput strategy under uncertainties....

We study pursuit-evasion games for mobile robots and their applications to collision avoidance.In the first part of paper, under assumption that pursuer evader (possibly subject physical constraints) share same roadmap plan strategies, we present sound complete strategies three different games.In second part, utilize results post-process workspace and/or configuration space obtain a probability map environment.Next, probabilistic method this trajectories which minimize independent robots.

Optimizing nationwide air traffic flow entails computational difficulty as the is generally modeled a multicommodity network, which involves huge number of variables. This paper presents framework that speeds up optimization. Nationwide using link transmission model (LTM), to dual-decomposition method applied. The large-scale problem decomposed into master and independent subproblems, are easy solve. As result, execution solving subproblem parallelizable. A parallel computing based on...

A linear time-varying aggregate traffic flowmodel can be used to develop flowmanagement strategies using optimization algorithms. However, there are few methods available in the literature translate these solutions into practical control actions involving individual aircraft. In this paper, a computationally efficient disaggregation algorithm is proposed by employing series of program and mixed integer methods, which converts an (flow-based) solution flight-specific action. Numerical results...

The insertion of communication networks in the feedback loops control systems is a defining feature modern systems. These are often subject to unknown inputs form disturbances, perturbations, or attacks. objective this paper design and analyse an observer for networked dynamical with inputs. network effect can be viewed as either perturbation time-delay exchanged signals. In paper, we (1) review input (UIO) non-networked system, (2) derive (NetUIO) dynamics, (3) NetUIO such that higher delay...