Sound-Quality-Based Decision Making in Multiobjective Optimisation of Operations for Sustainable Airport Scenarios

Abstract

The paper deals with a community-oriented approach to the multiobjective optimisation of sustainable takeoff and landing procedures of commercial aircraft. The objective functions to be minimised are defined as the measure of area surrounding the airport where the Sound Exposure Level (SEL) is higher than 60 dBA, and the amount of fuel burned during the procedure. The first merit factor is a measure of the number of citizens affected by a potentially harmful noise level, whereas the second is proportional to the chemical emissions. The novelty of the present approach is the use of a criterion based on sound quality for the selection of the optimal procedure from the Pareto front set. The spectrum of the noise produced by each non-dominated solution is compared to a reference spectrum, the target sound. This is synthesised to meet the acceptance requirements that emerged by a campaign of psychometric tests. The rationale underlying the research is tightly linked to the expected transformation of civil aviation, with the advent of new air transport solutions in urban and suburban environments. The breakthrough nature of the emerging scenarios requires a drastic renewal of the approaches used in the management of operations, and the present work represents a contribution to this evolution. The optimisation is attained adopting a global, deterministic method, and numerical results are obtained for single- and twin-aisle aircraft.

Experimental characterisation and data-driven modelling of unsteady wall pressure fields induced by a supersonic jet over a tangential flat plate

“…Therefore, the norm in the space can be used as a metric to be minimised to match the model of the spectra with the available data. Furthermore, since low values of enhance the contribution of distributed differences and high values of emphasise local differences, the choice of can drive the modelling process towards the minimisation of broadband or tonal component differences (low and high values of , respectively); such an approach has been successfully used in both the aircraft conceptual optimal design and the low-noise flight path optimization (Diez & Iemma 2012; Centracchio, Burghignoli & Iemma 2021 a ; Iemma & Centracchio 2022). Tailored objectives based on the norm are currently under analysis for active modelling problems that involve spectra with significant tonal components (preliminary results can be found in Iemma et al.…”

Data-Driven Multiobjective Optimization of Wave-Packets for Near-Field Subsonic Jet Noise

“…Since it represents the set of the non-dominated solutions, moving along the front is not possible to improve one of the objective values without worsening at least one of the others. One of the techniques that may be employed to identify the preferred solution among the optima is to identify a ranking criterion [15,49,[52][53][54] (also called Decision Maker algorithm), to be used as an added objective, evaluating the solutions performance on it and then selecting the solution resulting in the most suitable. Any selection criterion is valid in principle and may be used reasonably, from simple subjective preferences to more complex analyses of the results.…”