9 research outputs found
An Integrated Approach to Optimised Airport Environmental Management
No full textAirports around the world continue to face issues related to the environmental impact of aviation. Mitigation measures have therefore been implemented at many of these airports. Attaining an optimal combination of these mitigation measures is a complex process and because of these complexities, this process does not always result in the most efficient solution in terms of environmental impact.It is expected that some of the inefficiencies of mitigation measures can be eliminated by using a process that is based on three main principles: to use mathematical optimisation in order to select the best mitigation options, to evaluate multiple performance areas simultaneously, and to evaluate multiple mitigation options at multiple levels of aggregation simultaneously. These three principles have therefore been implemented as capabilities in an integrated decision support system, to determine whether such a system could help improve the airport environmental management process.Based on the results obtained with the developed support system, the benefits resulting from each of the three capabilities are demonstrated. But ultimately, it is shown that especially the combination of these three capabilities, integrated into a single support system, contributes to improving the airport environmental management process
Efficient use of the Noise Budget at Schiphol Airport through Minimax Optimization of Runway Allocations
No full textThis paper presents the development of a runway allocation planning tool that seeks to maximize the permissible number of flight operations into and out of an airport within a given annual noise budget. Although the model that underlies the planning tool is generic in nature, the tool has been customized for application to a specific airport, viz. Amsterdam airport Schiphol in the Netherlands. The noise budget regulations applicable at Schiphol stipulate limits on the annual cumulative noise loads at a large number of enforcement points arranged around the airport. To ensure an equitable distribution of the cumulative noise load at the enforcement points, an efficient allocation and distribution of the annual flight movements over available runways and routes is required that takes weather induced restrictions into account. To this end, a Linear Programming (LP) optimization formulation has been developed that implements a minimax performance criterion that aims to minimize the maximum cumulative noise load value occurring at any of the enforcement points. The numerical results obtained for the operational year 2005 clearly demonstrate the potential of the tool to maximize the yearly number of flight movements within the assigned noise budget.Control & OperationsAerospace Engineerin
Improving Aircraft Noise Predictions ConsideringFan Rotational Speed
No full textAccurate predictions of aircraft noise levels are desirable to enforce noise control regulations around airports and to evaluate noise abatement procedures. The current best practice noise contour prediction models assume certain default net thrust values depending on the engine type and aircraft altitude. This Paper proposes a method for calculating the engine fan settings N1% (and, hence, the net thrust) directly from audio recordings. This method was tested with a large number of Airbus A330–300 and Boeing 777–200 flyover audio recordings. A significant correlation was found between the recorded noise levels and N1%, explaining up to 45% of the variability in the noise levels. Using the calculated N1% values in the noise prediction models, instead of the default values, increases the agreement with the actual recorded noise levels and explains parts of the variability. The inclusion of accurate values of N1% and the update of the aircraft noise prediction calculations is therefore highly encouraged, for example, by increasing the dependency on N1% of the noise levels.Read More: https://arc.aiaa.org/doi/10.2514/1.C034849Aircraft Noise and Climate Effect
Development of a Multi-Event Trajectory Optimization Tool for Noise-Optimized Approach Route Design
No full textThis paper presents preliminary results from an ongoing research effort towards the development of a multi-event trajectory optimization methodology that allows to synthesize RNAV approach routes that minimize a cumulative measure of noise, taking into account the total noise effect aggregated for all inbound flight movements taking place within an operational year. This new development is an extension of a tool called NOISHHH which was developed earlier for the synthesis of single-event noise abatement RNAV trajectories into and out of airports. Although the presented numerical examples pertain to a specific airport in the Netherlands, viz. Rotterdam the Hague airport, this study focuses on the development of a generic methodology that can be applied to any given airport. Initial application of the adapted optimization framework to the design of noise abatement RNAV approach routes at Rotterdam The Hague airport reveals a significant potential for reducing the number of people highly annoyed due to annual noise exposure relative to the existing situation.Control & OperationsAerospace Engineerin
Advanced noise abatement departure procedures: Custom optimized departure profiles
No full textAerospace Engineerin
