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1. Gariel, Maxime. Toward a graceful degradation of air traffic management systems.

Degree: PhD, Aerospace Engineering, 2010, Georgia Tech

Abstract: This thesis addresses the problem of graceful degradation for air traffic management systems (ATMS). The graceful degradation is the process by which the safety of the airspace is ensured in the event of failures or operational degradation in the system. After listing the main areas where failures and degradation can affect the ATMS, an ontology of the ATMS is proposed. The ontology allows to introduce failures at different levels, track their propagation throughout the system, and measure their operational impact. Then, two operational degradations are studied: The first degradation studied is a reduction in the landing capacity at San Francisco International Airport. The aircraft queueing process for terminal area is modeled and optimized to ensure a graceful degradation. The second degradation encompasses Communication, Navigation and Surveillance systems failures. The graceful degradation is ensured by increasing the spacing distance between aircraft, using novel algorithms of avoidance under uncertainties. Those algorithm also serve as probes to compare the degradation capabilities of different traffic configurations such as Miles-In-Trail and Free-Flight arrivals. Finally, this thesis focuses on monitoring the airspace for potential degradation. The ability and the difficulty of en-route traffic configuration are evaluated using degradation maps. Those maps can be used controller to rapidly and efficiently steer traffic from nominal mode of operations to mode of operations under abnormal conditions. Finally, a monitoring tool for terminal area is presented: the conformance of current flight to pre-identified typical operations is determined in real time. As the number of non-conforming aircraft increases, the complexity seen by air traffic controllers increases, and can become a threat for the airspace safety. Advisors/Committee Members: Eric Feron (Committee Chair), Daniel Delahaye (Committee Member), John-Paul Clarke (Committee Member), Karen Feigh (Committee Member), Vitali Volovoi (Committee Member).

Subjects/Keywords: Air traffic control; Airspace monitoring; Graceful degradation; Air traffic management; Capacity degradation; Communication navigation and surveillance degradat; Failure; Air traffic capacity; Airplanes Collision avoidance; Airports Traffic control

…by monitoring aircraft operations for unexpected events. 1.5 Airspace Monitoring… …Airspace monitoring consists of observing and analyzing the behavior of aircraft in the airspace… …operations. Airspace monitoring can evaluate the capability of a given traffic configuration to… …40 2D and 3D view of the airspace during simulation . . . . . . . . . . . . . . . 100 41… …National Airspace System, p. 8. NCT Northern California TRACON, p. 41. NextGen Next… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Gariel, M. (2010). Toward a graceful degradation of air traffic management systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/34799

Chicago Manual of Style (16th Edition):

Gariel, Maxime. “Toward a graceful degradation of air traffic management systems.” 2010. Doctoral Dissertation, Georgia Tech. Accessed December 12, 2019. http://hdl.handle.net/1853/34799.

MLA Handbook (7th Edition):

Gariel, Maxime. “Toward a graceful degradation of air traffic management systems.” 2010. Web. 12 Dec 2019.

Vancouver:

Gariel M. Toward a graceful degradation of air traffic management systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2010. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/1853/34799.

Council of Science Editors:

Gariel M. Toward a graceful degradation of air traffic management systems. [Doctoral Dissertation]. Georgia Tech; 2010. Available from: http://hdl.handle.net/1853/34799

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