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Designing freedom into trajectory-based operations

Kuenz, Alexander and Schwoch, Gunnar and Korn, Bernd (2015) Designing freedom into trajectory-based operations. Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering. SAGE Publications. doi: 10.1177/0954410015613113. ISSN 0954-4100.

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Modern Flight Management Systems (FMS) are able to predict highly precise 4D trajectories for complete flights from take-off to touchdown. The generated trajectories take into account aircraft’s performance parameters, altitude-, speed- and time constraints, given procedures, and the expected weather conditions, as forecasted. Based on these trajectories, a traffic scheduler can generate and guarantee conflict-free traffic – as long as every aircraft sticks to the plan. However, even the most accurate trajectory becomes unrealizable when significant disturbances arise that were not foreseeable at prediction time. Uncertainties like imprecise weather forecasts, inaccurate departure times, and issues with delayed passengers influence a direct implementation of pre-planned 4D schedules in practice. If such disturbing events are rare, the overall plan may be adapted. Too many disturbances might ruin the whole schedule though. This article discusses the trade-off between built-in robustness in the initial planning stage and the obtainable efficiency. Resilience is added by increasing the separation between trajectories. Assuming that the mandatory distance for guaranteeing safe operations remains constant, the additional separation provides freedom for aircraft following their trajectories.

Item URL in elib:https://elib.dlr.de/95290/
Document Type:Article
Title:Designing freedom into trajectory-based operations
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Kuenz, AlexanderUNSPECIFIEDhttps://orcid.org/0000-0001-5192-8894UNSPECIFIED
Schwoch, GunnarUNSPECIFIEDhttps://orcid.org/0000-0001-7507-7131UNSPECIFIED
Korn, BerndUNSPECIFIEDhttps://orcid.org/0000-0003-3598-8971UNSPECIFIED
Journal or Publication Title:Proceedings of the Institution of Mechanical Engineers Part G-Journal of Aerospace Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
EditorsEmailEditor's ORCID iDORCID Put Code
Publisher:SAGE Publications
Series Name:Air Traffic Management
Keywords:Trajectory-based operations, conflict detection and resolution, flight management system, freedom margins, optimized trajectories
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Efficient Flight Guidance (old)
Location: Braunschweig
Institutes and Institutions:Institute of Flight Guidance > Pilot Assistance
Deposited By: Kuenz, Dr. Alexander
Deposited On:06 Mar 2015 18:09
Last Modified:14 Nov 2023 13:04

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