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Mulders, Imke (author)In the pursuit of creating monumental and desirable cities with a sustainable character, the municipality of Delft has embarked on a journey of integrating sustainability principles into its urban development strategies. This paper traces Delft's evolution in sustainable design practices through a historical lens over the past three decades....student report 2024
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Brandetti, L. (author), Mulders, S.P. (author), Merino Martinez, R. (author), Watson, S.J. (author), van Wingerden, J.W. (author)Vertical-axis wind turbines (VAWTs) are considered promising solutions for urban wind energy generation due to their design, low maintenance costs, and reduced noise and visual impact compared to horizontal-axis wind turbines (HAWTs). However, deploying these turbines close to densely populated urban areas often triggers considerable local...review 2024
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Mulders, Elke (author)The combination of the monumental building, the Rotonde, and the panoramic painting ‘Panorama Mesdag’ is one of the few remaining exhibitions of its kind. The organization of the museum aims to preserve the building and painting while also wanting to decrease the carbon footprint of the museum. The objective of this research is to design a...master thesis 2023
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Brandetti, L. (author), Mulders, S.P. (author), Liu, Y. (author), Watson, S.J. (author), van Wingerden, J.W. (author)The combined wind speed estimator and tip-speed ratio (WSE–TSR) tracking wind turbine control scheme has seen recent and increased traction from the wind industry. The modern control scheme provides a flexible trade-off between power and load objectives. On the other hand, the Kω2 controller is often used based on its simplicity and steady-state...journal article 2023
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Mulders, S.P. (author), Liu, Y. (author), Spagnolo, Fabio (author), Christensen, P.B. (author), van Wingerden, J.W. (author)Modern industrial wind turbine controllers for partial-load region control are becoming increasingly complex by progressively relying on modeled aerodynamic characteristics. These advanced turbine controllers generally consist of a combined wind speed estimator and tracking controller, allowing for a granular trade-off between energy capture...journal article 2023
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Huang, L.J. (author), Mulders, S.P. (author), Taschner, E. (author), van Wingerden, J.W. (author)In most current offshore wind farms, the turbines are controlled greedily, neglecting any coupling by wake effects with other turbines. By neglecting these effects of aerodynamic interactions, the power production performance is substantially reduced. Besides the well-known wake steering and dynamic induction control wake control strategies, a...conference paper 2023
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Dinkla, R.T.O. (author), Oomen, T.A.E. (author), van Wingerden, J.W. (author), Mulders, S.P. (author)Light Detection and Ranging (LIDAR)-assisted Model Predictive Control (MPC) for wind turbine control has received much attention for its ability to incorporate future wind speed disturbance information in a receding horizon optimal control problem. However, the growth of wind turbine sizes results in increasing system complexity and system...conference paper 2023
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Mulders, S.P. (author), Brandetti, L. (author), Spagnolo, F. (author), Liu, Y. (author), Christensen, P.B. (author), van Wingerden, J.W. (author)Wind turbine partial-load controllers have evolved from simple static nonlinear function implementations to more advanced dynamic controller structures. Such dynamic control schemes have the potential to improve power production performance in realistic environmental conditions and allow for a more granular trade-off between loads and energy...conference paper 2023
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Liu, Y. (author), Pamososuryo, A.K. (author), Mulders, S.P. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)The estimation of the rotor effective wind speed is used in modern wind turbines to provide advanced power and load control capabilities. However, with the ever increasing rotor sizes, the wind field over the rotor surface shows a higher degree of spatial variation. A single effective wind speed estimation therefore limits the attainable...journal article 2022
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Brandetti, L. (author), Liu, Y. (author), Mulders, S.P. (author), Ferreira, Carlos (author), Watson, S.J. (author), van Wingerden, J.W. (author)In recent years, industrial controllers for modern wind turbines have been designed as a combined wind speed estimator and tip-speed ratio (WSE-TSR) tracking control scheme. In contrast to the conventional and widely used Kω 2 torque control strategy, the WSE-TSR scheme provides flexibility in terms of controller responsiveness and...journal article 2022
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Gonzalez Silva, J. (author), van der Hoek, D.C. (author), Mulders, S.P. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)Wind turbines are prone to structural degradation, particularly in offshore locations. Based on the structural health condition of the tower, power de-rating strategies can be used to reduce structural loads at the cost of power losses. This paper introduces a novel closed-loop switching control architecture to constrain the thrust in individual...conference paper 2022
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Pamososuryo, A.K. (author), Mulders, S.P. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)The ever-increasing power capacities of wind turbines promote the use of tall and slender turbine towers. This poses a challenge from a fatigue loading perspective by the relocation of the first and lightly-damped tower side-side natural frequency into the turbine operating regime, promoting its excitation during nominal operation. The...conference paper 2022
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van Wingerden, J.W. (author), Mulders, S.P. (author), Dinkla, R.T.O. (author), Oomen, T.A.E. (author), Verhaegen, M.H.G. (author)Direct data-driven control has attracted substantial interest since it enables optimization-based control without the need for a parametric model. This paper presents a new Instrumental Variable (IV) approach to Data-enabled Predictive Control (DeePC) that results in favorable noise mitigation properties, and demonstrates the direct equivalence...conference paper 2022
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Mulders, M. (author)Volatile fatty acids (VFA) may serve as building blocks for Polyhydroxyalkanoates (PHA) production and can be derived from waste streams. Ideal streams for PHA production contain a high Chemical Oxygen Demand (COD) to nutrient ratio, such as (waste)water from a paper-mill factory or candy-bar factory. The (waste)water generated by these...doctoral thesis 2021
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Hari, S. (author), Trompenaars, P. H.F. (author), Mulders, J. J.L. (author), Kruit, P. (author), Hagen, C.W. (author)High resolution dense lines patterned by focused electron beam-induced deposition (FEBID) have been demonstrated to be promising for lithography. One of the challenges is the presence of interconnecting material, which is often carbonaceous, between the lines as a result of the Gaussian line profile. We demonstrate the use of focused electron...journal article 2021
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Mulders, Maurits (author)A side-channel attack is performed by analyzing unwanted physical leakage to achieve a more effective attack on the cryptographic key. An attacker performs a profiled attack when he has a physical and identical copy of the target device, meaning the attacker is in full control of the target device. Therefore, these profiled attacks are known as...master thesis 2020
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Mulders, S.P. (author)In the last decades, tremendous efforts have been put in advancements of wind turbine technology by scientific research and industrial developments. One of the focal areas has been the upscaling of turbines to increase power capacity. However, by enlarging turbine sizes, the square-cube law dictates rising costs per unit of power capacity. To...doctoral thesis 2020
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Frederik, J.A. (author), Doekemeijer, B.M. (author), Mulders, S.P. (author), van Wingerden, J.W. (author)Wind farm control using dynamic concepts is a research topic that is receiving an increasing amount of interest. The main concept of this approach is that dynamic variations of the wind turbine control settings lead to higher wake turbulence, and subsequently faster wake recovery due to increased mixing. As a result, downstream turbines...journal article 2020
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Huijgens, H.K.M. (author), Rastogi, A. (author), Mulders, E.A. (author), Gousios, G. (author), van Deursen, A. (author)In 2014, a Microsoft study investigated the sort of questions that data science applied to software engineering should answer. This resulted in 145 questions that developers considered relevant for data scientists to answer, thus providing a research agenda to the community. Fast forward to five years, no further studies investigated whether the...conference paper 2020
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Mulders, S.P. (author), Zaaijer, M B (author), Bos, R. (author), van Wingerden, J.W. (author)Standardized, easy to use, and preferably open-source research software is an important aspect in supporting and solidifying the wind turbine community. To this end, three contributions in the form of open-source software projects are presented in this paper. First, a community-driven wind turbine baseline controller, the Delft Research...journal article 2020