4D Fuel Optimal Trajectory Generation from Waypoint Networks

• Autor(a) principal: Ahmed, Kawser
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10400.6/6531
• topic: 4D Waypoint Navigation; Base of Aircraft Data (Bada); Cost Index; Dijkstra´S Algorithm; Fuel Conservation; Domínio/Área Científica::Engenharia e Tecnologia::Outras Engenharias e Tecnologias

The purpose of this thesis is to develop a trajectory optimization algorithm that finds a fuel optimal trajectory from 4D waypoint networks, where the arrival time is specified for each waypoint in the network. Generating optimal aircraft trajectory that minimizes fuel burn and associated environmental emissions helps the aviation industry cope with increasing fuel costs and reduce aviation induced climate change, as CO2 is directly related to the amount of fuel burned, therefore reduction in fuel burn implies a reduction in CO2 emissions as well. A single source shortest path algorithm is presented to generate the optimal aircraft trajectory that minimizes the total fuel burn between the initial and final waypoint in pre-defined 4D waypoint networks. In this work the 4D waypoint networks only consist of waypoints for climb, cruise and descent phases of the flight without the takeoff and landing approach. The fuel optimal trajectory is generated for three different lengths of flights (short, medium and long haul flight) for two different commercial aircraft considering no wind. The Results about the presented applications show that by flying a fuel optimal trajectory, which was found by implying a single source shortest path algorithm (Dijkstra’s algorithm) can lead to reduction of average fuel burn of international flights by 2.8% of the total trip fuel. By using the same algorithm in 4D waypoints networks it is also possible to generate an optimal trajectory that minimizes the flight time. By flying this trajectory average of 2.6% of total travel time can be saved, depends on the trip length and aircraft types.