- document
-
Clarenburg, Jimmy (author)Designing a controlled offshore system is a challenging process, the system dynamics are often nonlinear and subjected to loads that are random in nature. Furthermore, the proper description of the system’s dynamical behaviour involves knowledge pertaining to several fields. Unfortunately, at the design level, the process is often segregated...master thesis 2019
- document
-
Saikumar, N. (author), Valério, D.P.M.O. (author), Hassan HosseinNia, S. (author)This paper presents a complex order filter developed and subsequently integrated into a PID-based controller design. The nonlinear filter is designed with reset elements to have describing function based frequency response similar to that of a linear (practically non-implementable) complex order filter. This allows for a design which has a...conference paper 2019
- document
-
Baumann, M.M. (author), van Gijzen, M.B. (author)We consider wave propagation problems that are modeled in the frequency-domain, and that need to be solved simultaneously for multiple frequencies within a fixed range. For this, a single shift-and-invert preconditioner at a so-called seed frequency is applied. The choice of the seed is crucial for the performance of preconditioned multi...journal article 2019
- document
-
Ahmadi Dastjerdi, A. (author), Vinagre, Blas M. (author), Chen, Yang Quan (author), Hassan HosseinNia, S. (author)Today, there is a great tendency toward using fractional calculus to solve engineering problems. The control is one of the fields in which fractional calculus has attracted a lot of attention. On the one hand, fractional order dynamic models simulate characteristics of real dynamic systems better than integer order models. On the other hand,...review 2019
- document
-
Ruiz, Carlos (author), Medina, Edgar (author), Ramirez, Abner (author), Mehrizi-Sani, Ali (author), de Jesus Chavez, Jose (author), Davoudi, Ali (author), Abdel-rahman, Mohamed (author)This paper presents an approach to obtain reduced-order models for power networks involving power electronic converters (PEC) via the frequency-domain balanced realizations (FDBR) technique. PECs play an essential role in power processing and energy conversion in modern electrical networks, such as the interconnection of renewable generators,...journal article 2019
- document
-
Wan, Mingyao (author)Floating offshore solar platforms (FOSPs) are envisaged to become Ultra Large Floating Structures (ULFS) with horizontal dimensions of several kilometers. The payload of these structures comprises mainly the photovoltaic panels as well as cabling and limited electrical equipment. Thus the payload per unit area of these FOSPs is very low....master thesis 2018
- document
-
Bresser, Jerome (author)Real-time ship motion predictions contributes to safer operations at sea and increases workability. Nowadays, a handful of people and companies are actively working on this subject. Most approaches use the ship’s navigational radar to first predict the wavefield surrounding the vessel and then calculate the motion response. One of the methods...master thesis 2018
- document
-
Wang, Hanwei (author)Moored vessels are subject to wave forces and moments at different frequencies, which induce motions of the body and can be transferred to the mooring lines and fenders. Under extreme forces and vessel motions, dangerous line breaking accidents can occur or the ship movements can be simply too large to continue the loading/unloading process,...master thesis 2018
- document
-
Abhishek, Abhisek (author)Recognizing climate change as a result of more than 150 years of industrial activity, and due to the emission reduction protocols set internationally, wind energy has become the mainstream source of energy for many developed nations. Due to the prospect of large scale energy generation, wind energy has moved offshore. Offshore wind farms are...master thesis 2018
- document
-
Clades, Dinos (author)This master thesis describes a method to determine the workability of an offshore heavy lift operation. By creating wave realisations based on and statistically equivalent to measured ocean weather data, a quick assessment of the risk of failure can be achieved.master thesis 2018
- document
-
de Zeeuw, Alwin (author)Wave barriers are a common mitigation measure when dealing with environmentally induced vibrations. These wave barriers generally consist of stiff vertical walls buried in the soil to impede waves on their path from the source to the receiver. The geometries of the wave barriers that are used in practice are very simple. More complex geometries...master thesis 2018
- document
-
Heuberger, Chris (author)Floating bridges are found at locations where deep water must be crossed for a long distance, such as in Norwegian fjords. The superstructure of the existing floating bridges is usually constructed from steel. In a marine environment these bridges are exposed to dynamic wave loads. As such, the current floating bridges suffer severe damage due...master thesis 2018
- document
-
Liu, J. (author), Isufi, E. (author), Leus, G.J.T. (author)In graph signal processing, signals are processed by explicitly taking into account their underlying structure, which is generally characterized by a graph. In this field, graph filters play a major role to process such signals in the so-called graph frequency domain. In this paper, we focus on the design of autoregressive moving average ...conference paper 2018
- document
-
A Linear Method for Shape Reconstruction based on the Generalized Multiple Measurement Vectors ModelSun, S. (author), Kooij, B.J. (author), Yarovoy, Alexander (author), Jin, T. (author)In this paper, a novel linear method for shape reconstruction is proposed based on the generalized multiple measurement vectors (GMMV) model. Finite difference frequency domain (FDFD) is applied to discretized Maxwell’s equations, and the contrast sources are solved iteratively by exploiting the joint sparsity as a regularized...journal article 2018
- document
-
Gottardi, L. (author), Smith, S.J. (author), Kozorezov, A. (author), Akamatsu, H. (author), Bruijn, M. P. (author), Chervenak, J. A. (author), Gao, J.R. (author), Jackson, B. D. (author), Ridder, M. (author)Frequency-division multiplexing is the baseline read-out system for large arrays of superconducting transition-edge sensors (TES’s) under development for the X-ray and infrared instruments like X-IFU (Athena) and SAFARI, respectively. In this multiplexing scheme, the sensors are ac-biased at different frequencies from 1 to 5 MHz and operate...journal article 2018
- document
-
Chepuri, S.P. (author), Eldar, Yonina C. (author), Leus, G.J.T. (author)In this paper the focus is on sampling and reconstruction of signals supported on nodes of arbitrary graphs or arbitrary signals that may be represented using graphs, where we extend concepts from generalized sampling theory to the graph setting. To recover such signals from a given set of samples, we develop algorithms that incorporate prior...conference paper 2018
- document
-
Smirnova, Vera B. (author), Proskurnikov, A.V. (author), Utina, Natalia V. (author), Titov, Roman V. (author)Systems that can be decomposed as feedback interconnections of stable linear blocks and periodic nonlinearities arise in many physical and engineering applications. The relevant models e.g. describe oscillations of a viscously damped pendulum, synchronization circuits (phase, frequency and delay locked loops) and networks of coupled power...conference paper 2018
- document
-
Wani, F.M. (author), Dong, J. (author), Polinder, H. (author)Permanent magnet machines with fractional slot windings are popular because of their shorter end windings, low cost and ease of manufacturing. On the other hand, fractional slot machines have higher eddy current losses in the rotor magnets and sleeve. An accurate calculation of these losses usually involves a time-stepped finite-element analysis...conference paper 2018
- document
-
Cavallo, G. (author), van de Ruit, M.L. (author), Schouten, A.C. (author), van Wingerden, J.W. (author), Lataire, J. (author)In this study, a nonparametric method, developed in Lataire et al. (2012), is applied to the identification of linear time-varying human joint admittance. The aim of the method, denoted Skirt Decomposition method, is to reconstruct the time-varying system function. The main contribution of the paper is to evaluate the possibilities and...journal article 2018
- document
-
Orozco, Michael (author), de Jesus Chavez, Jose (author), Popov, M. (author), Garcia-Vite, Pedro M. (author)This paper presents a hybrid methodology to analyze electromagnetic transients in a photovoltaic distributed system. The methodology consists in split the system into two parts: The external zone, where the system is reduced by a dynamic equivalent obtained by the application of Balance Realization (BR) theory and the internal zone, where the...conference paper 2018