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- Wang, X. (author), Cavalcante Siebert, L. (author), van den Hoven, M.J. (author) conference paper 2020
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Purgat, P. (author), Bandyopadhyay, S. (author), Qin, Z. (author), Bauer, P. (author)This paper proposes a power flows decoupling controller for the triple active bridge converter. The controller is based on a full-order continuous-time model of the TAB converter derived using the generalized average modelling (GAM) technique. GAM uses the Fourier series expansion to decompose the state-space variables into two components,...conference paper 2020
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Sand, M. (author), Jongsma, Karin (author)Scientific discoveries are often to some degree influenced by luck. Whether luck’s influence is at odds with common-sense intuitions about responsibility, is the central concern of the philosophical debate about moral luck. Do scientists acknowledge that luck plays a role in their work and–if so–do they consider it morally problematic? The...journal article 2020
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Karasek, M. (author), Perçin, M. (author), Cunis, Torbjørn (author), van Oudheusden, B.W. (author), de Wagter, C. (author), Remes, B.D.W. (author), de Croon, G.C.H.E. (author)Flow visualisations are essential to better understand the unsteady aerodynamics of flapping wing flight. The issues inherent to animal experiments, such as poor controllability and unnatural flapping when tethered, can be avoided by using robotic flyers that promise for a more systematic and repeatable methodology. Here, we present a new...journal article 2019
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Horváth, K. (author), van Esch, B. (author), Vreeken, D. (author), Pothof, I.W.M. (author), Baayen, J. (author)This study presents convex modeling of drainage pumps so that real-time control systems can be implemented to minimize their energy use. A convex model is built based on pump curves and then used in mixed-integer optimization to allow pumps to be turned on or off. It is implemented as an extension to the open source software package RTC-Tools...journal article 2019
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Kajak, K. M. (author), Karasek, M. (author), Chu, Q. P. (author), de Croon, G.C.H.E. (author)Recently, several insect- and hummingbird-inspired tailless flapping wing robots have been introduced. However, their flight dynamics, which are likely to be similar to that of their biological counterparts, remain yet to be fully understood. We propose a minimal dynamic model that is not only validated with experimental data, but also able...journal article 2019
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de Athayde Costa e Silva, M. (author)In recent years, there has been an increase in the number of small multi-mission platforms such as CubeSats, in an attempt to reduce costs of space missions. CubeSats have been used for different purposes including Earth observation, research and technology demonstration.<br/>However, a key technology that is still under development is the...doctoral thesis 2018
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Gavriilidou, A. (author), Cats, O. (author)Real-time holding control strategies are implemented, among other reasons, in order to protect transfers. In the context of high-frequency services, there is a need to reconcile between striving for single-line regularity and synchronizing inter-line arrivals. Their operationalization depends on the predictions regarding passenger flows...journal article 2018
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Schwab, A.L. (author), Dialynas, G. (author), Happee, R. (author)The bicycle, being unstable at low speed and marginally stable at high speed, is sensitive to lateral perturbations. One of the major lateral perturbations is crosswind, which can lead to accidents and fatalities. Here we investigate the effect of crosswind on the lateral dynamics and control of the bicycle in a wide range of forward speeds and...conference paper 2018
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Lopez Romero, M.A. (author), Prieto-Arranz, Javier (author), Traver, Jose Emilio (author), Hunt, A. (author), Hassan HosseinNia, S. (author), Tejado, Ines (author), Vinagre, Blas M. (author)Ionic polymer metal composite (IPMC) actuators have promising applications in robotics and medicine in a not distance future, which will require a big knowledge in different fields, such as, manufacturing, material characterization and control theory. In this paper, frequency response of several IPMC actuators, cut from the same bulk IPMC sheet...conference paper 2018
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Dialynas, G. (author), Happee, R. (author), Schwab, A.L. (author)Since the 1800s, the design of bicycles involves a mechanical linkage between the handlebar and the fork assembly. Herein, we propose an innovation, where the traditional mechanical connection between the handlebar and fork is decoupled and replaced with sensors, servomo-tors and a microcontroller allowing artificial manipulation of the bicycle...conference paper 2018
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de Wagter, C. (author), Ruisink, Rick (author), Smeur, E.J.J. (author), van Hecke, K.G. (author), van Tienen, F. (author), van der Horst, E. (author), Remes, B.D.W. (author)To participate in the Outback Medical Express UAV Challenge 2016, a vehicle was designed and tested that can autonomously hover precisely, takeoff and land vertically, fly fast forward efficiently, and use computer vision to locate a person and a suitable landing location. The vehicle is a novel hybrid tail‐sitter combining a delta‐shaped...journal article 2018
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Silva, Joao Paulo (author), de Wagter, C. (author), de Croon, G.C.H.E. (author)This paper proposes a trajectory planning and control strategy to optimally visit a given set of waypoints in the presence of wind. First, aerodynamic properties of quadrotors which affect trajectory planning and tracking performance are investigated. Blade flapping, induced and parasitic drag are derived and an extended method to identify all...journal article 2017
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de Wagter, C. (author), Smeur, E.J.J. (author)This work investigates the design parameters and their consequences in the control of a helicopter rotor combined with a pair of fixed wings. This hybrid vehicle has a light and aerodynamically efficient rotor with a large range of pitch angles to enable both hover and forward flight. Because of the light stiff rotor and heavy wings, the hybrid...journal article 2017
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- de Bruijn, F.J. (author) doctoral thesis 2017
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Machin Llanos, Jorge (author), Bouwmeester, J. (author)There are several benefits of using autonomous sensors in spacecraft. Avoidance of wired connections reduces cost, mass, and increases the flexibility and reliability of the system. The impact of wire reduction can be significant, especially for small satellites with many sensors, like temperature and sun sensors. Previous research has already...conference paper 2017
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Aydin, B.E. (author), Rutten, M.M. (author), Abraham, E. (author), Oude Essink, GHP (author), Delsman, Joost (author)Surface water salinization in deltaic areas due to saline groundwater exfiltration is an important issue. Saline surface water will not be appropriate for drinking water production, agricultural and industrial use, and therefore, freshwater diverted from rivers is used for flushing the canals and ditches in coastal areas. The effects of climate...conference paper 2017
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Lara-Quintanilla, A. (author)The design of aerodynamic airfoils are optimized for certain conditions. For instance, the shape of the wings of fixed-wing aircrafts are designed and optimized for a certain flight condition (in terms of altitude, speed, aircraft weight, etc.). However, these flight conditions vary significantly during the flight. Currently, aircraft are...doctoral thesis 2016
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Bos, R. (author), Giyanani, A.H. (author), Bierbooms, W.A.A.M. (author)Lidars have gained a lot of popularity in the field of wind energy, partly because of their potential to be used for wind turbine control. By scanning the oncoming wind field, any threats such as gusts can be detected early and high loads can be avoided by taking preventive actions. Unfortunately, lidars suffer from some inherent weaknesses that...journal article 2016
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Plooij, M.C. (author)Since the industrial revolution, machines have taken over many tasks from humans, increasing labor productivity and prosperity. In the 20th century, the introduction of robots created a second wave of automation, increasing the labor productivity even further. In order to create a third wave of automation, it is necessary to develop a new...doctoral thesis 2015