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Vanhamel, J. (author), Dupont, Samuel (author), Kastelik, Jean-Claude (author), Dekemper, Emmanuel (author)Acousto-Optical Tunable Filters (AOTFs) make use of the interaction between sound and light. To generate an ultrasound diffraction grating, a Radio-Frequency (RF) signal is applied to a piezoelectric transducer. The optical pass band can be controlled by adapting the properties of this transducer and the RF-signal. To achieve more precise...conference paper 2024
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Tosto, F. (author), Pini, M. (author), Colonna, Piero (author)The blade solidity, namely the blade chordtopitch ratio, largely affects the fluiddynamic performance of turbomachinery. For turbomachines operating with air or steam, the optimal value of the solidity which maximizes the efficiency is estimated with empirical correlations such as the ones proposed by Zweifel (1945) and Traupel (1966). However,...conference paper 2024
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Tsatsas, I. (author), Georgopoulos, P. (author), Sodja, J. (author), De Breuker, R. (author)This paper presents an experimental investigation into the aeroelastic behavior of an innovative wind turbine design featuring a downwind two-blade rotor with a teetering hub mounted on a tower with adjustable tilt. The rotor model incorporates two sets of elastic blades—stiff and flexible—for scaling purposes, each instrumented with strain...conference paper 2024
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Konatala, R. (author), Milz, Daniel (author), Weiser, Christian (author), Looye, Gertjan H.N. (author), van Kampen, E. (author)Unforeseen failures during flight can lead to Loss of Control In-Flight, a significant cause of fatal aircraft accidents worldwide. Current offline synthesized flight control methods have limited capability to recover from failures, due to their limited adaptability. Incremental Approximate Dynamic Programming (iADP) control is a model-agnostic...conference paper 2024
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Döll, Carsten (author), Hoogreef, M.F.M. (author), Iannelli, Pierluigi (author)Within the work package radical new aircraft configuration of Cleansky2 Large Passenger Aircraft, a benefit of more than 20% in fuel consumption and CO2 emission (one of CS2 top level objectives) could be achieved by using various Distributed (hybrid) Electric Propulsion DEP architectures on different more or less radical aircraft configurations...conference paper 2024
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Keijzer, D.M. (author), Simon Soria, C. (author), Arends, J.J. (author), Sarıgöl, B. (author), Scarano, F. (author), Castro, Saullo G.P. (author)As of present the Urban Air Mobility market has been dominated by fully electric aircraft. However, hydrogen vehicles have remained relatively undeveloped in this segment, also because hydrogen poses additional design complexities and uncertainties concerning crashworthiness, fuel cell cooling, and low volumetric density. Nevertheless, hydrogen...conference paper 2024
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Laar, Y.A. (author), Atherstone, D.M. (author), Benad, J. (author), Vos, Roelof (author)The Flying V is a long-range, flying-wing aircraft where payload and fuel both reside in a V-shaped, crescent wing with large winglets that double as vertical tail planes. The objective of this study is to maximize the lift-to-drag (L/D) ratio of the Flying V in cruise conditions, i.e. CL= 0.26, M = 0.85 and to investigate its off-design...conference paper 2024
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Teirlinck, C. (author), van Kampen, E. (author)Recent advancements in fault-tolerant flight control have involved model-free offline and online Reinforcement Learning (RL) algorithms in order to provide robust and adaptive control to autonomous systems. Inspired by recent work on Incremental Dual Heuristic Programming (IDHP) and Soft Actor-Critic (SAC), this research proposes a hybrid SAC...conference paper 2024
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D'Aguanno, A. (author), González Romero, A. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)Hammerhead launcher configurations, characterized by a larger diameter in the payload fairing than the rest of the launch vehicle, face substantial challenges during transonic operations due to their susceptibility to flow separation and intense pressure fluctuations. This experimental study investigates the influence of the nose and boat-tail...conference paper 2024
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Bruggeman, A.M.R.M. (author), Nikitin, M. (author), la Rocca, G. (author), Bergsma, O.K. (author)During the early design stages of airframe components, many possible design architectures and production methods need to be traded to find the best configuration. Evaluating different production methods can be challenging as different production methods put different requirements on the product to be designed. This paper presents a new...conference paper 2024
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Li, H. (author), Ribeiro, M.J. (author), Santos, Bruno F. (author), Tseremoglou, I. (author)Aircraft maintenance scheduling is a focus point for airlines. Maintenance is essential to ensure the airworthiness of aircraft, but it comes at the cost of rendering them unavailable for operations. In current operations, aircraft maintenance scheduling must often be updated to include time for non-routine and non-schedule tasks. These non...conference paper 2024
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Gavra, V. (author), van Kampen, E. (author)Recent research in artificial intelligence potentially provides solutions to the challenging problem of fault-tolerant and robust flight control. The current work proposes a novel Safety-informed Evolutionary Reinforcement Learning (SERL) algorithm, which combines Deep Reinforcement Learning (DRL) and neuro-evolution to optimize a population of...conference paper 2024
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de Vries, R. (author), Wolleswinkel, Rob E. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)Battery-electric aviation is commonly believed to be limited to small aircraft and is therefore expected have a negligible impact on the decarbonization of the aviation sector. In this paper we argue that, with the correct choice of design parameters and top-level aircraft requirements, the addressable market is actually substantial. To...conference paper 2024
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Wolleswinkel, Rob E. (author), de Vries, R. (author), Hoogreef, M.F.M. (author), Vos, Roelof (author)Thus far, battery-electric propulsion has not been considered a promising pathway to climate-neutral aviation. Given current and expected battery technology, in most literature battery-electric aircraft are only considered feasible for short ranges (< 400 km) and small payloads (< 19 pax). As a result, battery-electric aircraft development...conference paper 2024
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Joksimović, Aleksandar (author), Carbonneau, Xavier (author), Brazier, F.M. (author), Vingerhoeds, Rob (author)This paper presents a simple explanatory framework to analyse the diverse strategies proposed by the civil aviation sector in attempts to reconcile its growth tendencies with its impact on natural environment. Despite framing the industry as a single entity that has a problem to solve, it is better represented as a diverse set of actors, each...conference paper 2024
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Joksimović, Aleksandar (author), Brazier, F.M. (author), Carbonneau, Xavier (author), Vingerhoeds, Rob (author)An overwhelming abundance of innovative civil aeroplane concepts has been presented by the research community in recent decades. Their development has been motivated mainly by need for better operating energy, or in particular the fuel efficiency - the common objective variable for economic and environmental optimisation. This paper focuses on...conference paper 2024
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Joksimović, Aleksandar (author), Carbonneau, Xavier (author), Brazier, F.M. (author), Vingerhoeds, Rob (author)This paper presents development of an innovative method for aeroplane system architecture design, based on the principles of causal networks. In light of the environmental crisis that the world faces, it is argued that the new design method should be motivated by sustainability values in the first place. This implies the necessity for a method...conference paper 2024
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Velázquez Navarro, Ester (author), Solano-López, Pablo (author), Uriol Balbin, I. (author)The demand for pressurized, large structures in space, such as habitats or fuel deposits, is increasing as the space industry grows. The limited payload volume of launch vehicles, combined with their highly constrained shape, presents a significant challenge for these structures. Origami-inspired deployable structures have emerged as a potential...conference paper 2024
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Rotundo, C.D. (author), Sinnige, T. (author), Sodja, J. (author)A tightly coupled aeroelastic design code for composite propeller blades was developed, verified, and used to perform design sensitivity studies. The design code features a structural model that accounts for geometric nonlinearities through the application of a corotational framework, nonlinear responses to loads, and a cross-sectional modelling...conference paper 2024
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Çavdar, I. (author), Mooij, E. (author)Within the last decade, the use of launch vehicles has increased as private companies have emerged in the space exploration industry. Compared to the early 1980s, the market for launch vehicles has become significantly more competitive, introducing the desire to have fully reusable launch vehicles. The true benefits of fully reusable launch...conference paper 2024