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Langidis, A. (author), Petrovic, V. (author), Mancini, S. (author), Boorsma, K. (author), Schepers, J.G. (author), Kühn, M. (author)Dynamic inflow effects occur due to the rapid change of the rotor loading under conditions such as fast pitch steps. The paper presents a setup suitable for the investigation of those effects for non-axisymmetric rotor conditions, namely individual pitch steps. Furthermore, insights into the relevant phenomena are gathered. An individual pitch...conference paper 2023
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- Palumbo, M.C. (author), de Graaf, A.A. (author), Morettini, M. (author), Tieri, P. (author), Krishnan, S. (author), Castiglione, F. (author) article 2023
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Mooren, N. (author), Witvoet, G. (author), Oomen, T. (author)Data-driven feedforward control for tracking of varying and non-resetting point-to-point references requires continuous updating of feedforward parameters instead of task-by-task updating. The aim of this paper is to develop an adaptive feedforward controller for non-resetting point-to-point motion tasks by a data-driven feedforward controller....article 2023
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Material Evaluation Framework of Additive Manufactured Aluminum Alloys for Space Optical InstrumentsPost, Z.J. (author), Zimbeck, W.R. (author), Storck, S.M. (author), van Kempen, F. (author), Otter, G.C.J. (author), Boldt, J.D. (author), van der Laan, L. (author), Szczesniak, S.R. (author), Carter, R.H. (author), Mueller, R.K. (author), Nimer, S.M. (author), Trigg, d.B. (author), Berkson, M.A. (author), Morgan, M.F. (author), Swartz, W.H. (author)A framework for additive manufacturing aluminum alloy selection was developed to determine the preferred composition and process parameters from which to fabricate topology-optimized optical instrument housings and light-weighted freeform mirrors for the Compact Hyperspectral Air Pollution Sensor (CHAPS). In recent years, a number of high...conference paper 2023
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Chai, X. (author), Rozsas, A. (author), Slobbe, A. (author), Teixeira, A. (author)This paper investigates the impact of structural health monitoring (SHM) on the failure probability of a simulated sheet pile wall system. We use Bayesian statistics to estimate non-directly observable soil parameters from measured structural responses. These estimates are used to calculate the failure probability of the structure against...article 2022
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Kemper, F. (author), Geurts, C.P.W. (author)For the modeling of stochastic structural responses due to wind gusts, reasonable assumptions for the aerodynamic admittance are elementary. However, still a large variety of corresponding models exists and it lacks of validation and reliable model estimation studies based on real-data. In this paper, real-data from a high-rise tower in...conference paper 2022
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Bronkhorst, A.J. (author), Moretti, D. (author), Geurts, C.P.W. (author)Wind-induced vibrations are an important aspect in high-rise building design. The structural properties that influence vibrations are the mass and stiffness of the building and the foundation. These properties are difficult to predict in the design, resulting in inaccurate predictions of the dynamic response. As a first step towards better...conference paper 2022
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Sabbadini, A. (author), Massaad, J. (author), van Neer, P.L.M.J. (author), de Jong, N. (author), Verweij, M.D. (author)In recent years, several fitting techniques have been presented to reconstruct the parameters of a plate from its Lamb wave dispersion curves. Published studies show that these techniques can yield high accuracy results and have the potential of reconstructing several parameters at once. The precision with which parameters can be reconstructed...article 2022
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- Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author) article 2022
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Pertijs, M.A.P. (author), de Jong, N. (author), Verweij, M.D. (author)Clamp-on ultrasonic flow meters (UFMs) are installed on the outside of the pipe wall. Typically, they consist of two single-element transducers mounted on angled wedges, which are acoustically coupled to the pipe wall. Before flow metering, the transducers are placed at the correct axial position by manually moving one transducer along the pipe...article 2022
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Rozsas, A. (author), Slobbe, A. (author), Martini, G. (author), Jansen, R. (author)This paper describes a static diagnostic load testing and measurement campaign of a reinforced concrete road bridge in Amsterdam. We consider 29 vertical translation sensors and 37 strain sensors. Multiple Bayesian parameter estima tions are performed to estimate two structural and two load parameters of a three-dimensional finite element (FE)...article 2022
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Karabanova, A. (author), Berdiyeva, P. (author), van der Pal, M. (author), Johnsen, R.E. (author), Deledda, S. (author), Blanchard, D. (author)Thermochemical heat storage is expected to play an important role in the ongoing transformation of the European energy system. The efficiency of thermochemical heat storage systems largely depends on that of the reactor, since it limits the amount of the heat stored per unit volume as well as the rate of the heat recovery. Thus, the optimization...article 2021
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Massaad, J. (author), van Neer, P.L.M.J. (author), van Willigen, D.M. (author), Sabbadini, A. (author), de Jong, N. (author), Pertijs, M.A.P. (author), Verweij, M.D. (author)Current ultrasonic clamp-on flow meters consist of a pair of single-element transducers which are carefully positioned before use. This positioning process consists of manually finding the distance between the transducer elements, along the pipe axis, for which maximum SNR is achieved. This distance depends on the sound speed, thickness and...article 2021
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Kessels, I. (author), Koopman, B. (author), Verdonschot, N. (author), Marra, M. (author), Gijsbertse, K. (author)The performance of military tasks is often exacerbated by additional load carriage, leading to increased physical demand. Previous studies showed that load carriage may lead to increased risk of developing musculoskeletal injuries, a reduction in task speed and mobility, and overall performance degradation. However, these studies were limited to...article 2021
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- den Boef, P. (author), Cox, P.B. (author), Tóth, R. (author) conference paper 2021
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Xiao, C. (author), Leeuwenburgh, O. (author), Lin, H.X. (author), Heemink, A. (author)A reduced order modeling algorithm for the estimation of space varying parameter patterns in numerical models is proposed. In this approach domain decomposition is applied to construct separate approximations to the numerical model in every subdomain. We introduce a new local parameterization that decouples the computational cost of the...article 2021
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Atanasov, A.N. (author), Ahmad, W.H.R.A.M. (author), Alink, M.S.O. (author), van Vliet, F.E. (author)We propose a fast and simple method to accurately determine the compressing stage in a two-stage amplifier system based on reverse intermodulation and hot S-parameter measurements. The method uses no specialized hardware and needs little reconfiguration, simplifying the measurements. We demonstrate its validity over a broad range of amplifiers...conference paper 2021
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Remington, B.C. (author), Westerhout, J. (author), Meima, M.Y. (author), Blom, W.M. (author), Kruizinga, A.G. (author), Wheeler, M.W. (author), Taylor, S.L. (author), Houben, G.F. (author), Baumert, J.L. (author)Food allergy and allergen management are important global public health issues. In 2011, the first iteration of our allergen threshold database (ATDB) was established based on individual NOAELs and LOAELs from oral food challenge in roughly 1750 allergic individuals. Population minimal eliciting dose (EDp) distributions based on this dataset...article 2020
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Steijn, W.M.P. (author), van Kampen, J.N. (author), van der Beek, D. (author), Groeneweg, J. (author), van Gelder, P.H.A.J.M. (author)Quantitative Risk Analysis (QRA) is a standard tool in some high-risk industries (such as the on- and offshore exploration and production and chemical industry). Presently, existing knowledge concerning human error likelihood and human reliability assessment is insufficiently represented in QRAs. In this paper we attempt to implement the...article 2020
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Vijn, A.R.P.J. (author), Baas, O. (author), Lepelaars, E.S.A.M. (author)The purpose of this article is to estimate the parameters of the Jiles-Atherton hysteresis model, based on minor-loop measurement data in weak applied fields. The well-known hysteresis model by Jiles and Atherton serves as a basis of this article with an extension for the closure of minor loops. In order to represent minor loops correctly, a...article 2020