- document
-
Fang, Juan (author), Haldimann, Michael (author), Marchal Crespo, L. (author), Hunt, Kenneth J. (author)In a parallel development to traditional rigid rehabilitation robotic systems, cable-driven systems are becoming popular. The robowalk expander product uses passive elastic bands in the training of the lower limbs. However, a well-controlled assistance or resistance is desirable for effective walking relearning and muscle training. To achieve...journal article 2021
- document
-
Ahmadi Dastjerdi, A. (author), Hassan HosseinNia, S. (author)Constant in gain Lead in phase (CgLp) compensators, which are a type of reset elements, have shown high potential to overcome limitations of linear control systems. There are few works which investigate the tuning of these compensators. However, there are some significant drawbacks which make those methods unreliable. First, their analyses...journal article 2021
- document
-
Tepljakov, Aleksei (author), Alagoz, Baris Baykant (author), Yeroglu, Celaleddin (author), Gonzalez, Emmanuel A. (author), Hassan HosseinNia, S. (author), Petlenkov, Eduard (author), Ates, Abdullah (author), Cech, Martin (author)The interest in fractional-order (FO) control can be traced back to the late nineteenth century. The growing tendency towards using fractional-order proportional-integral-derivative (FOPID) control has been fueled mainly by the fact that these controllers have additional 'tuning knobs' that allow coherent adjustment of the dynamics of control...journal article 2021
- document
-
Markolefas, Panagiotis (author)The preliminary design of wind turbine support structures within an offshore wind farm plays a significant role in decreasing the costs involved and is pivotal in establishing the wind sector as a leading contributor towards a sustainable future. During the early design stages, the optimization of structural dimensions, which involves a large...master thesis 2020
- document
-
Doss, Arnav (author)Floating breakwaters are applicable in several offshore applications to protect downstream structures from excessive wave loads and to reduce their motion response. This thesis investigates the impact of the leading platform, functionally a breakwater, on the RAOs and response of the platforms behind it in frequency domain. The structures are...master thesis 2020
- document
-
van Duijn, Niels (author)A QUAD lift is a new lifting method in which dual crane vessels combine their vessel capability to increase their offshore lift performance. The use of the Jumbo J-Class vessels in a QUAD lift creates the opportunity to increase the offshore lift capacity and to install structures with larger dimensions. When floating vessels are close to each...master thesis 2020
- document
-
Buitenhuis, R.N. (author)The ever-increasing industry desire for improved performance makes linear controller design run into its fundamental limitations. A nonlinear controller, such as Reset Control (RC), is needed to overcome these. RC is promising since, unlike other nonlinear methods, it easily integrates into the PID design framework preferred by industry. Thus...master thesis 2020
- document
-
van Gils, Martijn (author)Pre-piling templates are often used in the offshore industry to ensure the vertical installation of foundation piles for jacket structures. Boskalis is currently preparing a project that uses these templates in the Taiwan Strait, which is a region known for its relatively soft soils and seismic activity. Consequently, the piles are very long in...master thesis 2020
- document
-
Kaczmarek, Marcin (author)Reset control is a "simple" nonlinear control strategy that has the potential of being widely adopted and improving the performance of systems traditionally controlled with PIDs. Lack of suitable methods for proving stability, that are in line with the current industrial practice, hampers the wider acceptance of reset control. In this thesis,...master thesis 2020
- document
-
Eijgenraam, Koen (author)This study is focused on the decommissioning of a jacket with a heavy lift vessel. During the transport the crane suspended jacket hanging in air can start swinging due to swell waves. This can result in undesired risks such as a collision between the jacket and the vessel. To prevent this undesired risks from occurring a solution must be sought...master thesis 2020
- document
-
Yang, Y. (author), Yao, Jun (author), Dewald, Julius (author), van der Helm, F.C.T. (author), Schouten, A.C. (author)This paper introduces the Cross-frequency Amplitude Transfer Function (CATF), a model-free method for quantifying nonlinear stimulus-response interaction based on phase-locked amplitude relationship. The CATF estimates the amplitude transfer from input frequencies at stimulation signal to their harmonics/intermodulation at the response signal....journal article 2020
- document
-
Van Essen, Tanja (author), Goos, T.G. (author), Van Ballegooijen, Liza (author), Pichler, Gerhard (author), Urlesberger, Berndt (author), Reiss, Irwin K.M. (author), De Jonge, Rogier C.J. (author)Background: Non-invasive monitoring of cerebral tissue oxygen saturation (rcSO<sub>2</sub>) during transition is of growing interest. Different near-infrared spectroscopy (NIRS) techniques have been developed to measure rcSO<sub>2</sub>. We compared rcSO<sub>2</sub> values during the immediate transition in preterm neonates measured with...journal article 2020
- document
-
Ridder, M. L. (author), Nagayoshi, K. (author), Bruijn, M. P. (author), Gottardi, L. (author), Taralli, E. (author), Khosropanah, P. (author), Akamatsu, H. (author), van der Kuur, J. (author), Ravensberg, K. (author), Visser, S. (author), Nieuwenhuizen, A. C.T. (author), Gao, J.R. (author), den Herder, J. W. (author)Superconducting transition-edge sensors (TESs) are highly sensitive detectors. Based on the outstanding performance on spectral resolution, the X-ray integral field unit (X-IFU) instrument on-board athena will be equipped with a large array of TES-based microcalorimeters. For optimal performance in terms of the energy resolution, it is...journal article 2020
- document
-
Yang, Ruiyun (author), Qiao, Tiezhu (author), Pang, Y. (author), Yang, Yi (author), Zhang, Haitao (author), Yan, Gaowei (author)A novel approach based on infrared spectrum analysis for early-warning of longitudinal tearing of the conveyor belt was proposed in the paper. Unlike most existing methods, the proposed method monitors the change process of the infrared radiation field of the longitudinal tearing through the infrared thermal imaging technology, and judges...journal article 2020
- document
-
Xu, L. (author), Lu, T. (author)A straightforward and practical method of frequency-domain analysis is developed for coupled vehicle-track system. The influence of the track flexibility and spatial coherence of irregularities on frequency response of vehicle-track systems are systematically studied<br/>accounting for train velocity and irregularity wavelength. Calculations...journal article 2020
- document
-
de Leeuw, Koen (author)In 2022 the first 12 MW offshore wind turbines are expected to be installed. Due to the continuous upscaling of wind turbine generators new problems are expected to arise during the installation of the turbines. Especially the workability of the installation of larger wind turbine blades, which are already causing problems during the...master thesis 2019
- document
-
Gabriel, Maarten (author)A two-dimensional (2D) panel method is developed to find the first and second order wave forces acting on a semi-submerged cylinder in regular waves. The panel method is based on potential flow and the waves are modeled for both finite and infinite water depth. The motion is limited to heave, but allows for extensions to other modes as well. It...master thesis 2019
- document
-
de Bruijn, Janno (author)In the Netherlands there are many bridges that crosses waterways, which are key nodes in the transportation system. The safety and integrity of these bridges is nowadays assessed by (visual) inspections at regular intervals. This approach cannot provide information about damage development in between inspections, leading to potential failure or...master thesis 2019
- document
-
de Koning, Bart (author)In this thesis we examine various aspects of the output signal produced by the electrical pickup of an electric guitar. We do this by formulating a model of this output signal based on the one dimensional damped wave equation for the motion of one guitar string and (initially) a simple linear model for the output signal based on this motion....bachelor thesis 2019
- document
-
De Wet, Pieter (author)Offshore operations are increasingly executed by vessels operating on dynamic positioning (DP) due to advantages it has for short operations, such as maintenance and crew transfer but also for track keeping operations and projects in deeper water. Currently, DP capability plots are used to indicate whether an operation can be performed, but this...master thesis 2019