- document
-
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
- document
-
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
- document
-
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
- document
-
Mooij, E. (author), Root, B.C. (author)With the increasing interest in the Solar System's smaller bodies, quite a few missions have been sent to comets and asteroids, and more will be send in the near future. Due to the large distances involved, communication to command mission parameters takes a long time, which has a negative impact on operational safety. Autonomous navigation...conference paper 2024
- document
-
Maathuis, H.F. (author), De Breuker, R. (author), Castro, Saullo G.P. (author)Design optimisation potentially leads to lightweight aircraft structures with lower environmental impact. Due to the high number of design variables and constraints, these problems are ordinarily solved using gradient-based optimisation methods, leading to a local solution in the design space while the global space is neglected. Bayesian...conference paper 2024
- document
-
Stougie, P.J. (author), Pollack, T.S.C. (author), van Kampen, E. (author)To reduce the impact of aviation on the environment, technological innovations, such as the Flying-V are required. The Flying-V is a proposed commercial flying wing, which uses the Airbus A350-900 as reference aircraft. In this work, a Flight Control system for the Flying-V is proposed with a longitudinal ��∗ control law, and a Rate Control...conference paper 2024
- document
-
Mohammadikalakoo, B. (author), Kotsonis, M. (author), Doan, Nguyen Anh Khoa (author)This work focuses on the suppression of Tollmien-Schlichting (TS) waves in a two-dimensional laminar boundary layer using optimized unsteady suction and blowing jets as an Active Flow Control (AFC) method. The suppression of TS waves via this AFC system is enabled through two artificial intelligence-based optimization methodologies: Single-Step...conference paper 2024
- document
-
Marino, Luca (author), Kiat, I. (author), Eberle, Adrian (author), Sodja, J. (author)This paper investigates the impact of introducing a switchable vortex generator (SVG), acting as a mini-tab, on the aerodynamic performance of a high-aspect-ratio wing's outer section in transonic regime. A parametric study is conducted employing computational fluid dynamics 2D simulations, focusing on the aerodynamic effects of changing the...conference paper 2024
- document
-
Exalto, J.Q.B. (author), Pacini, Bernardo (author), Kaneko, Shugo (author), Martins, Joaquim R. R. A. (author), Hoogreef, M.F.M. (author)Propeller-wing configurations are expected to return to the aviation industry due to their high propulsive efficiency and applicability in urban and regional air mobility. A knowledge gap exists around wing-propeller optimization because of the complexity of the propeller-wing system and the absence of a computationally efficient way to assess...conference paper 2024
- document
-
Anand, N.R. (author), Motloung, T. (author), Quak, H.J. (author), van Duin, Ron (author)The number of activities in city logistics is growing rapidly causing an increase in emissions, and a decline in accessibility and safety in cities. Therefore, the Dutch government has introduced GreenDeal Zero-emission city logistics. The goal of this deal is to have 30-40 of the biggest municipalities in the Netherlands have zero-emission city...conference paper 2024
- document
-
Cao, Jianpeng (author), Zhang, Hang (author), Pan, Bo (author), Soman, R. K. (author), Savov, Anton (author), Hall, Daniel M. (author)Design for manufacturing and assembly (DfMA) is an engineering methodology which aims to increase ease of manufacture and efficiency of assembly by considering manufacturing and assembly constraints in the design process. However, current DfMA approaches in the construction sector are not automated enough to identify the design features that...conference paper 2024
- document
-
Krasnov, O.A. (author), Zhang, Q. (author), Yarovoy, Alexander (author)In this paper, the full calibration chain of FMCW radar with simultaneous transmission of two orthogonally polarized orthogonal waveforms is considered. Specifically for this type of polarimetric radar, compensation of signals’ biases and equalization of the amplification gains of the parallel polarimetric channels in the receiver are jointly...conference paper 2024
- document
-
Dash, T.K. (author), Driessen, J.N. (author), Krasnov, O.A. (author), Yarovoy, Alexander (author)The challenge of reconstructing the Doppler spectrum of a precipitation-like event observed by a fast-scanning weather radar is addressed. A novel method is proposed where the echo sequence in time is assumed to be a complex Gaussian process with a known covariance structure. It is a two-step approach where the first step is the estimation of...conference paper 2024
- document
-
Ahrens, B.P. (author), Matthes, Ralph (author), van der Weide, N.J. (author), Wullaert, K.F. (author)We present a formalization of different categorical structures used to interpret linear logic. Our formalization takes place in UniMath, a library of univalent mathematics based on the Coq proof assistant. All the categorical structures we formalize are based on monoidal categories. As such, one of our contributions is a practical, usable...conference paper 2024
- document
-
van der Weide, N.J. (author), Rasekh, Nima (author), Ahrens, B.P. (author), North, P.R. (author)Category theory is a branch of mathematics that provides a formal framework for understanding the relationship between mathematical structures. To this end, a category not only incorporates the data of the desired objects, but also "morphisms", which capture how different objects interact with each other. Category theory has found many...conference paper 2024
- document
-
Wuite, F.G.E. (author), Peng, Zhikai (author), Kim, K.J. (author), Lugten, M.C. (author), Tenpierik, M.J. (author)This study aims to evaluate the impact of different urban building geometries (six courtyards, two canyons, two slabs) on heat mitigation and aircraft noise attenuation, in order to support an evidence-based retrofit plan for future airport neighborhoods. Using ’Pachyderm + ENVI-met simulations + field measurements’, we found that the slanted...conference paper 2024
- document
-
Forouzandeh Shahraki, N. (author), Brembilla, E. (author), Stoter, J.E. (author), Nan, L. (author)3D modeling of indoor spaces is a prerequisite for daylight simulation, and the accuracy of the 3D models has a significant impact on the simulation. The goal of this study was to quantify the errors caused by modeling indoor spaces at different accuracy levels to find the optimal balance between the reliability of the results and labor...conference paper 2024
- document
-
Van Rheenen, E.S. (author), Padding, J.T. (author), Visser, K. (author)Hydrogen carriers are attractive alternative fuels for the shipping sectors. They are zero-emission, have high energy densities, and are safe, available, and easy to handle. Sodium borohydride, potassium borohydride, dibenzyltoluene, n-ethylcarbazole, and ammoniaborane are interesting hydrogen carriers, with high theoretical energy densities....conference paper 2024
- document
-
Kim, K.J. (author), Lugten, M.C. (author), Wuite, F.G.E. (author), Peng, Zhikai (author), Tenpierik, M.J. (author)Analyzing the impact of aircraft noise on urban areas requires specific consideration of sound propagation over long distances, which is not typically covered by tools designed for indoor acoustics. Although it is unclear to what extent existing parametric tools that combine 3D modeling and acoustic simulation can accurately replicate these...conference paper 2024
- document
-
Brembilla, E. (author), Wang, Taoning (author), Theodoropoulou, Panagiota (author), Beck, Wouter (author)The presence of sensor networks to monitor environmental conditions and the automation of blinds and lighting systems controls is now commonplace in buildings, especially public ones with a high number of occupants. However, implementing control algorithms that are sufficiently reactive to variable sky conditions and that actually meet...conference paper 2024