[Zurück]

R. Schild:
"Rule Optimization for Airborne Aircraft Separation";
Betreuer/in(nen), Begutachter/in(nen): M. Deistler; Institut für Ökonometrie, Operations Research und Systemtheorie, 1998.

The purpose of this work is to develop and evaluate rule sets applicable for autonomous separation assurance (ASAS) or "self separation" for conflict avoidance for en-route air traffic.

Three primary evaluation objectives for the separation rules have been applied, namely to provide safe inter-aircraft separation, use a minimum number of maneuvers for resolution and provide maximum efficiency in terms of additional flight time and fuel.

The aircraft separation criteria used in the optimization process have been 5 nautical miles laterally and 2000 feet vertically. These minima are currently in use for separation for continental en-route flight operation above flight level (FL) 290. Additionally reduced separation criteria of 3 nautical miles laterally and 1000 feet vertically were used to show differences for flight rules optimality under different separation criteria.

The number of maneuvers for conflict resolution are kept to a minimum in order to ensure simple and straight forward application by flight-crews with and without the assistance of resolution automation.

Cost efficiency of separation rules is taken into account through cost factors for additional time and fuel used for resolution maneuvers. Optimal cost efficiency has been a constraint in the design process.

The work consists of four main parts:

In the first part "Introduction", the principles of "Air Traffic Management (ATM) are explained and the potential operational environment for the application of flight rules for self separation purposes is explained.

The second part "Research Overview on Conflict Detection and Resolution", gives an overview of the "state of the art" of research in the field of conflict detection and resolution.

The third part "Flight Rule Evaluation and Optimization Process", describes the flight rules, the conflict situations & scenarios and the model (conflict simulation) used for the evaluation and optimization of flight rules. The components of the conflict simulation and the underlying assumptions are discussed in detail.


The fourth part "Results - Optimized Flight Rules -", presents and discusses the results of the flight rule optimization process.

http://www.eos.tuwien.ac.at/Oeko/Teaching/Theses/dissschild/index.htm