ATOS

Summary

• Acronym: ATOS
• Project name: Airport Traffic Optimization Simulator
• Start date: 2000
• End date: -

Description

ATOS is a fast time ground traffic simulator, developed in collaboration with the ATT division (Airport, Tower and Terminal areas) of the CENA (French Aviation Studies Center). At each simulation step, the incoming trajectories of aircraft are forecasted and some optimization methods are used to find a solution for each cluster of conflicting aircraft.

As an input, the simulator takes a detailed description of the gates, taxiways and runways (which is available for Roissy and Orly airports) in order to manage the actual traffic (real flightplan) related to the airport. Three different optimization methods can be applied in order to minimize the taxiing time while ensuring aircraft separations and runways sequencing :

• A deterministic method, which consist in sorting all the moving aircraft by fixed priority levels ;
• A method using genetic algorithms, which looks for a more global solution ;
• An hybrid method, which tries to find the best classification of aircraft.

The tool can be run under a Graphical User Interface, which allows to visualize the evolution of the traffic situations during the simulation or to replay any traffic sample.

Examples

Here are some traffic situation at Roissy, where the uncertainty positions of aircraft are represented by arrows and where the clusters of conflicting aircraft are identified by colors :

• a "common" situation at 13h02, with 5 clusters :
  • one on the North runway (2 aircraft),
  • one on the South runways (6 aircraft)
  • and 3 in the taxi area (3 aircraft each).

  

• at 13h14, we can observe 2 clusters of 16 and 7 aircraft :
most of taxiing aircraft are embedded in the South runway conflict.



• at 13h23, a single cluster concerns both North and South runways, due to 2 conflicting arrivals.

  

The following animations (in MPEG format) show the evolution of each cluster of conflicting aircraft during some different period of the day:

• from 13h10 to 13h20 (631K). This animation is also available as an animated GIF (1.6M).
• from 13h00 to 14h00 (3.5M)
• from 13h00 to 20h30 (33M)

Links

• Centre d'Etudes de la Navigation Aérienne (now : Sous Direction des Etudes et de la Recherche)
• The ATT division of the CENA
• Ocaml

Related publications

Optimisation du trafic au sol sur les grands aéroports Jean-Baptiste Gotteland Thèse de doctorat de l'INPT (2004/11/2)

Genetic Algorithms Applied to Airport Ground Traffic Optimization Jean-Baptiste Gotteland, Nicolas Durand Congress on Evolutionnary Computation (2003/12/6)

Handling CFMU slots in busy airports Jean-Baptiste Gotteland, Nicolas Durand, Jean-Marc Alliot Air Traffic Management Seminar (2003/06/22)

Respect des créneaux CFMU par le contrôle au sol Jean-Baptiste Gotteland Colloque des doctorants de l'EDIT (2003/02/16)

Optimisation du roulage sur les grands aéroports Jean-Baptiste Gotteland Colloque des doctorants de l'EDIT (2002/02/12)

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