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Jing, Guoqing (author), Aela, Peyman (author), Zhou, Qiang (author), Jia, W. (author)
The use of recycled materials is a new tendency in the field of railway engineering. Steel slag aggregates (SSA) are one of the recycled materials derived from the steel industry. The application of SSA in ballasted railway tracks requires mechanical examination. In the present paper, the shear behavior of the ballast layer constructed by SSA...
conference paper 2022
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Bentvelsen, Wouter (author), Gorsse, Guus Jonathan (author), Bouman, Niels (author), Bashandy, Vincent (author), Garofano, V. (author), Jovanova, J. (author)
Floating structures have raised interest in the recent years for different applications, from living and farming at sea to renewable energy production. To support the logistics on the floating structures, floating cranes are necessary and their designs are constantly improved. Increasing developments in the automation industry paved the way...
conference paper 2022
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Jovanova, J. (author), van den Bos, W. (author), Schott, D.L. (author)
Design of floating terminals requires integrated approach as it requires multi-machine systems. Master students in mechanical engineering from Multi-machine engineering track at TU Delft were assigned design of floating terminals as part of their Integration Project course. Each of seven student groups designed a specific piece of port...
conference paper 2022
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Schreier, S. (author), Jacobi, G. (author)
For Offshore Floating Photovoltaics (OFPV) applications, thin-film PV panels on lightweight floating support structures gain increasing scientific and commercial interest. Over the past years, several different concepts of thin-film OFPV have been proposed, with the common denominator of floating mattress or blanket-like support structures...
conference paper 2022
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Chang, J. (author), De Breuker, R. (author), Wang, Xuerui (author)
Incremental control, including incremental nonlinear dynamic inversion (INDI) and incremental backstepping (IBS), is a sensor-based control framework that enhances the control robustness by exploiting sensor measurements. Although its effectiveness has been demonstrated on various aerospace systems, the explicit and quantifiable expression for...
conference paper 2022
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van Overeem, S. (author), Wang, Xuerui (author), van Kampen, E. (author)
Considerable growth in the number of passengers and cargo transported by air is predicted. Besides that, aircraft noise and climate impact become increasingly important factors in aircraft design. These existing challenges in aviation boost interest in the design of innovative aircraft configurations. One of these configurations is a V-shaped...
conference paper 2022
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van der Leer, Q. (author), Hoogreef, M.F.M. (author)
The current focus in the aviation industry for more sustainable designs, could mean the revive of propeller propulsion, due to their relative high propulsion efficiency compared to jets. In addition, wingtip-mounted propellers installed in tractor configuration can be used as tip-vortex attenuating devices, reducing the wing induced drag. So far...
conference paper 2022
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Paul, Acquatella B. (author), van Kampen, E. (author), Chu, Q. P. (author)
This paper presents a sampled-data form of the recently reformulated incremental nonlinear dynamic inversion (INDI) applied for robust spacecraft attitude control. INDI is a combined model- and sensor-based approach mostly applied for attitude control that only requires an accurate control effectiveness model and measurements of the state and...
conference paper 2022
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Smit, B. (author), Pollack, T.S.C. (author), van Kampen, E. (author)
Control augmentation systems based on Incremental Nonlinear Dynamic Inversion (INDI) are able to provide high-performance nonlinear control without a holistic model. Considering an angular rate control law for a fixed-wing aircraft, only a control effectiveness (CE) model and angular acceleration measurement feedback is required. Despite...
conference paper 2022
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Pollack, T.S.C. (author), van Kampen, E. (author)
Incremental Nonlinear Dynamic Inversion (INDI) is a sensor-based control law design strategy that is based on the principles of feedback linearization. Contrary to its non-incremental counterpart (NDI), this design method does not rely on the availability of a high-fidelity on-board model of the airframe dynamics and is robust to aerodynamic...
conference paper 2022
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Dally, Killian (author), van Kampen, E. (author)
Fault-tolerant flight control faces challenges, as developing a model-based controller for each unexpected failure is unrealistic, and online learning methods can handle limited system complexity due to their low sample efficiency. In this research, a model-free coupled-dynamics flight controller for a jet aircraft able to withstand multiple...
conference paper 2022
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Kumtepe, Y. (author), Pollack, T.S.C. (author), van Kampen, E. (author)
Incremental Nonlinear Dynamic Inversion (INDI) is a sensor-based control strategy, which has shown robustness against model uncertainties on various aerospace platforms. The sensor-based nature of the method brings attractive properties, which has made it popular in the last decade. INDI globally linearizes the system by making use of control...
conference paper 2022
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Castro, Saullo G.P. (author), Jansen, E. L. (author)
The multi-modal formulation of Koiter's asymptotic method provides a systematic and efficient procedure to evaluate the initial post-buckling behaviour and to assess the nonlinear behavior of structures. This manuscript presents a displacement-based multi-modal formulation of Koiter's method for cylindrical shells, which are structures known for...
conference paper 2022
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Schiller, A. (author), Bisagni, C. (author)
Cylindrical shells are common structural elements in the aerospace sector due to their high load-carrying capacity per unit weight. Cutouts may, however, significantly reduce this load-carrying capacity, especially when cylindrical shells buckle under axial compression. Since the buckling load is often a crucial design parameter, it is important...
conference paper 2022
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Liu, C. (author), van Kampen, E. (author)
Reinforcement learning (RL) equipped with neural networks has recently led to a wide range of successes in learning policies for unmanned aerial vehicle (UAV) navigation and control problems. The success of RL relies on two human-designed heuristics: appropriate action space definition and reward function engineering. The commonly used fully...
conference paper 2022
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Hysa, I. (author), Tuinstra, Marthijn (author), Lammers, K (author), Scarano, F. (author), Sciacchitano, A. (author), Gebbink, Roy (author), Harrison, C (author)
Volumetric PIV measurements are performed to study the flow development around a 1:12 scale model of a thrust reverser in a low-speed wind tunnel. The thrust-reverser operates in a freestream flow of 3-5 m/s and with a jet to freestream velocity ratio Vjet/Vinf ranging from 1.5 to 6. Making use of sub-millimeter helium-filled soap bubbles, large...
conference paper 2022
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Dacome, G. (author), Schrijer, F.F.J. (author), van Oudheusden, B.W. (author)
The current study considers the configuration of a transverse jet in a supersonic crossflow that is interacting with an impinging oblique shock wave. The relevance of this configuration is associated to high-speed air-breathing propulsion systems, where a shock may be induced in the combustion chamber to enhance mixing. To investigate the...
conference paper 2022
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Mertens, C. (author), Sodja, J. (author), Sciacchitano, A. (author), van Oudheusden, B.W. (author)
The aeroelastic response of a very flexible wing in steady and unsteady inflow conditions is measured in a wind tunnel experiment. An integrated aeroelastic characterization is performed with a non-intrusive optical setup that allows simultaneous measurements of the structural motion and the flow field around the wing. The experimental...
conference paper 2022
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Domingos de Azevedo Quadros, F. (author), Snellen, M. (author), Dedoussi, I.C. (author)
Aircraft emitted oxides of nitrogen (NOx) contribute both to climate change and air quality degradation. The trend of higher gas temperatures, caused by engine design choices seeking lower fuel consumption and achieve more complete combustion, has the adverse effect of increasing NOx formation, which might however be compensated by improved...
conference paper 2022
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Solanki, P. (author), de Visser, C.C. (author)
Quadcopters are becoming increasingly popular across diverse sectors. Since rotor damages occur frequently, it is essential to improve the attitude estimation and thus ultimately the ability to control a damaged quadcopter. This research is based on a state-of-the-art method that makes it possible to control the quadcopter despite the total...
conference paper 2022
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