Archives Ouvertes HAL

Toutes les publications de l'ENAC en direct.
All ENAC publications.

[hal-02178441] Predicting and Analyzing US Air Traffic Delays using Passenger-centric Data-sources

Publications ENAC - Lundi, 15 juillet 2019 - 11:05:51
This paper aims at presenting a novel way of predicting and analyzing air traffic delays using publicly available data from social media with a focus on Twitter data. Three different machine learning regressors have been trained on this 2017 passenger-centric dataset and tested for the prediction up to five hours ahead of air traffic delays and cancellations for the first two months of 2018. Comparing and analyzing different accuracy measures of their prediction performances show that this dataset contains useful information about the current state and short-term future state of the air traffic system. The resulting methods yield higher prediction accuracy than...

[hal-02170467] Graph-Search Descent and Approach Trajectory Optimization Based on Enhanced Aircraft Energy Management

Publications ENAC - Vendredi, 12 juillet 2019 - 17:15:35
Air Traffic growth requires a modernization of current Air Transportation System in order to cope with the increasing demand, and thereby its impact on the environment poses aviation development at risk. Under this context, trajectory optimization projects constitute a relevant mean to reduce fuel consumption and decrease the likelihood of go-around events as a result of a non-stabilized approach. The generation of a continuous optimal trajectory would provide flight crews with an useful tool to manage aircraft flight path or directly automate the trajectory management. This papers proposes a novel methodology based on a tailored version of A* algorithm that generates...

[hal-02181089] When Air Traffic Management Meets Blockchain Technology: a Blockchain-based concept for securing the sharing of Flight Data

Publications ENAC - Vendredi, 12 juillet 2019 - 13:16:29
The Aviation industry has been booming for severaldecades and is expected to keep growing in the future. Therefore,Air Traffic Management (ATM) tools are likely to be soonoverwhelmed by the demand. The Single European Sky ATMResearch Program (SESAR) 2020, controlled byEUROCONTROL, intends to revisit the management ofaeronautical information along its full lifecycle and across thewhole European ATM system. The efficient sharing ofinformation over large scale cyber physical systems is a non-trivialproblem that raises several challenges including data lineage, dataconsistency, access rights management, and many more. Part ofthe SESAR initiative, System-Wide Information...

[hal-02138135] A Machine Learning Approach for Conflict Resolution in Dense Traffic Scenarios with Uncertainties

Publications ENAC - Jeudi, 11 juillet 2019 - 15:58:31
With the continuous growth in the air transportation demand, air traffic controllers will have to handle increased traffic and consequently more potential conflicts. That gives rise to the need for conflict resolution tools that can perform well in high-density traffic scenarios given a noisy environment. Unlike model-based approaches, learning-based or machine learning approaches can take advantage of historical traffic data and flexibly encapsulate the environmental uncertainty. In this study, we propose an artificial intelligent agent that is capable of resolving conflicts, in the presence of traffic and given uncertainties in conflict resolution maneuvers, without...

[hal-02138139] A Comparative Analysis of Departure Metering at Paris (CDG) and Charlotte (CLT) Airports

Publications ENAC - Jeudi, 11 juillet 2019 - 15:56:14
Departure metering has the potential to mitigate airport surface congestion and decrease flight delays. This paper considers several candidate departure metering techniques, including a trajectory-based optimization approach using a node-link model and three aggregate queue-based approaches (a scheduler based on NASA's ATD-2 logic, an optimal control approach, and a robust control approach). The outcomes of these different approaches are compared for two major airports: Paris Charles De Gaulle airport (CDG) in Europe and Char-lotte Douglas International airport (CLT) in the United States. Stochastic simulations are used to show that the robust control approach best...

[hal-02178439] A Heuristic Algorithm for Aircraft 4D Trajectory Optimization Based on Bezier Curve

Publications ENAC - Jeudi, 11 juillet 2019 - 15:23:07
In this study, we propose an aircraft 4D trajectory optimization model based on Bezier curve. Many real-world factors (such as winds, obstacles, uncertainties) and actions (the modification of departure time, the trajectory shape, aircraft speed and altitude) are taken into account. To solve the model, an improved simulated annealing algorithm with two phases was proposed: the first phase for reducing the number of conflicts and the second phase for decreasing the total flight time. A national-size dataset for France which is provided by a fast time simulator (ΠRATS) is used as a case study. The experimental results show that the algorithm provides conflict-free...

[hal-02178437] Optimizing Successive Airspace Configurations with a Sequential A * Algorithm

Publications ENAC - Jeudi, 11 juillet 2019 - 15:21:06
In this paper, we introduce exact tree search algorithms which explore all the possible sequences of airspace partitions , taking into account some constraints on the transitions between two successive airspace configurations. The transitions should be simple enough to allow air traffic controllers to maintain their situation awareness during the airspace configuration changes. For the same reason, once a sector is opened it should remain so for a minimum duration. The proposed method is a sequential A * algorithm with a rolling horizon. It finds a sequence of airspace configurations minimizing a cost related to the workload and the usage of manpower resources, while...

[hal-02138131] Learning Real Trajectory Data to Enhance Conflict Detection Accuracy in Closest Point of Approach

Publications ENAC - Jeudi, 11 juillet 2019 - 15:14:10
Closest Point of Approach (CPA) is one of the main problems in aircraft Conflict Detection (CD). It aims to find out the minimum distance and the associated time between two aircraft on the same altitude with crossing traffic. Conventional CPA prediction model generally assumes that the speed and heading of the aircraft are constant. But the uncertainties in real operations lead to the inaccuracy of CPA prediction. In this paper, we introduce a novel CD framework with Machine Learning (ML) methods. It aims to improve the CPA prediction accuracy with the help of real trajectory data. The new model contributes to not only reduce the number of fault short-mid term conflict...

[tel-02169432] From surface to surface -Transformations de surface tactile pour l'interaction incarnée dans le cockpit

Publications ENAC - Mercredi, 10 juillet 2019 - 11:46:41
The "surface" in interactive touch systems is both the support of touch and im- age. While over time touch surfaces have been transformed in their thicknesses, shapes or stiffness, the interaction modality is still limited, as on the first de- vices, to a simple contact of the finger with the screen in a gesture that pretends to manipulate what is displayed. The sense of touch, even for touch devices in- stalled in critical systems, such as in the aeronautics or automotive fields, re- mains mainly used as an extension of vision, to point and control. While the theories of the phenomenology of perception, ecological perception and tangible and embodied...

[hal-02165690] Contribution à la formalisation des propriétés graphiques des systèmes interactifs pour la validation automatique

Publications ENAC - Jeudi, 4 juillet 2019 - 18:24:42
Dans la plupart des secteurs, les systèmes d'aujourd'hui sont interactifs et disposent d'in-terfaces graphiques sophistiquées. A notre connaissance, il existe peu d'études sur la vérifi-cation des propriétés spécifiques de la scène graphique des interfaces homme-machine et en particulier sur celles liées à la visibilité des composants graphiques par l'utilisateur humain. Dans ce papier, nous introduisons notre formalisme permettant de spécifier certaines proprié-tés des composants graphiques, dans l'objectif de réaliser à terme un outillage de validation automatique de ces propriétés. Nous illustrons l'usage de ce formalisme pour des propriétés extraites d'une norme...
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