- document
-
van Vliet, Sjoerd (author)Different paradigms can be used to evoke brainwaves. These brainwaves can be interpreted as commands that can be used to control different applications. These frameworks that interpret the brainwaves are called brain-computer interfaces. Steady-state visually evoked potentials is one of these paradigms that uses external stimuli flickering at...master thesis 2023
- document
-
Flipse, Delano (author)The placement of a subwoofer has significant impact on the quality of its sound reproduction. This paper present a method to optimise subwoofer placement in a room. Resonances caused by room boundaries (called "room modes") cause localised peaks and lows for specific lower frequencies. The goal is to minimize the simulated frequency response...bachelor thesis 2023
- document
-
van den Bergh, Michael (author)Energy harvesters subtract energy from their surroundings and convert this to electrical energy. Even though energy output is generally low, energy harvesters can offer great value by offering the possibility of self-sustaining devices, combined with the developments in low power semiconductors. Many examples can be found of applications that...master thesis 2023
- document
-
Unsiwilai, S. (author), Wang, L. (author), Nunez, Alfredo (author), Li, Z. (author)This paper presents a methodology for monitoring transition zones using responses of multiple-axle box acceleration (multi-ABA) measurements. The time–frequency characteristics of the vertical ABA signals from four wheelsets are analyzed. The major contributions are as follows. (1) We propose four key performance indicators (KPIs) to quantify...journal article 2023
- document
-
Chen, Y. (author), Castro Heredia, L.C. (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Ross, Robert (author)Partial discharges (PD) detection is an effective diagnostic method to assess the insulation condition of electrical power equipment in the high-voltage laboratory or field tests. This paper presents a non-contacting PD detection method for power equipment. The method is based on an extra high-sensitivity adapted giant magneto-resistive (xMR)...journal article 2023
- document
-
Mathew, P. (author), Ghaffarian Niasar, M. (author), Vaessen, P.T.M. (author)Penetration of power electronics in the grid has produced a new species of stresses, characterized by fast-rising pulsed waveforms with microsecond rise times repeating at several tens of kilohertz. Analyzing their impact on existing and future insulation systems requires pulse modulators, most often with pulse transformers (PTs), to perform...journal article 2023
- document
-
Jamshidnejad, A. (author), Sun, D. (author), Ferrara, Antonella (author), De Schutter, B.H.K. (author)Model predictive control (MPC) has been widely used for traffic management, such as for minimizing the total time spent or the total emissions of vehicles. When long-term green urban mobility is considered including e.g. a constraint on the total yearly emissions, the optimization horizon of the MPC problem is significantly larger than the...journal article 2023
- document
-
Hammer, T.C. (author), Hendrikse, H. (author)Drifting sea ice failing in crushing against vertically-sided offshore structures can cause ice-induced vibrations. Offshore structures are typically founded on slender structures to minimize the load effect of waves and currents. In combination with large top masses, those offshore structures often provide sufficient compliance for ice-induced...conference paper 2023
- document
-
Çelik, F.T. (author), Joof, Sulayman (author), Karacuha, Kamil (author)The present study proposes a dual-polarized bandwidth-enhanced filtering specialized dipole antenna design for 5G by employing a wide printed dipole, filtering resonators, a reflector surface, and specially designed balun structures. Such a configuration is commonly deployed in conventional base stations. To increase the antenna impedance and...journal article 2023
- document
-
Xiao, Hong (author), Zhang, Zhihai (author), Zhu, Yajie (author), Gan, Tiancheng (author), Wang, Haoyu (author)Before the operation of newly constructed railways, tamping and stabilizing machines should be used to improve the quality of ballast beds. With the expansion of the railway network and increase of speeds and axle loads, higher quality and efficiency for tamping and stabilizing operation are required. However, previous studies did not involve...journal article 2023
- document
-
Ahmadi Dastjerdi, A. (author), Astolfi, Alessandro (author), Hassan HosseinNia, S. (author)Reset controllers have the potential to enhance the performance of high-precision industrial motion systems. However, similar to other non-linear controllers, the stability analysis for these controllers is complex and often requires parametric model of the system, which may hinder their applicability. In this paper a frequency-domain...journal article 2023
- document
-
Vaccaro, D. (author), Akamatsu, H. (author), Gottardi, L. (author), Bruijn, M. P. (author), van der Linden, A. J. (author), van Leeuwen, B. J. (author), van der Hulst, P. (author), de Vries, C. P. (author), Gao, J.R. (author)We report our most recent progress and demonstration of a frequency domain multiplexing (FDM) readout technology for transition-edge sensor (TES) arrays, both of which we have been developing in the framework of the X-IFU instrument on board the future Athena X-ray telescope. Using Ti/Au TES micro-calorimeters, high-Q LC filters and analog...journal article 2023
- document
-
Wu, Y. (author), Qin, Z. (author), Soeiro, Thiago B. (author), Bauer, P. (author)With the great emphasis from the international standard-setting community on the so-called supra-harmonics emissions (2-150 kHz), there are increasing research efforts in this noise level identification, measurement, standard setting and mitigation. The periodic variable switching frequency PWM method, which is known as VSFPWM, can reshape the...conference paper 2023
- document
-
Montazerolghaem, M.A. (author), de Vreede, L.C.N. (author), Babaie, M. (author)By introducing three different techniques, this article, for the first time, presents a wideband highly linear receiver (RX) capable of handling blocking scenarios in fifth-generation (5G) microcell base station applications. First, a parallel preselect filter is introduced to satisfy the base station co-location blocking requirements. Next,...journal article 2023
- document
-
Yang, Fan (author), Zhang, P. (author), Wang, Yuan (author), Wei, Kai (author), Dong, Liwei (author), Wang, Ping (author)The coupled vehicle-track system (CVTS) dynamics have been extensively investigated for decades. However, the calculation accuracy of prevailing vehicle-track coupling models needs to be improved in the high frequency range due to the inappropriate model simplification and neglect of material nonlinearity. In this study, we propose a refined...journal article 2023
- document
-
Buitenhuis, R. N. (author), Saikumar, N. (author), Hassan HosseinNia, S. (author)The ever-increasing industry desire for improved performance makes linear controller design run into fundamental limitations. Nonlinear control methods such as Reset Control (RC) are needed to overcome these. RC is a promising candidate since, unlike other nonlinear methods, it easily integrates into the industry-preferred PID design...journal article 2023
- document
-
Chen, Gang (author), Dong, Wei (author), Peng, Peng (author), Alonso-Mora, J. (author), Zhu, Xiangyang (author)Particle-based dynamic occupancy maps were proposed in recent years to model the obstacles in dynamic environments. Current particle-based maps describe the occupancy status in discrete grid form and suffer from the grid size problem, wherein a large grid size is unfavorable for motion planning while a small grid size lowers efficiency and...journal article 2023
- document
-
Çelik, F.T. (author), Aslan, Y. (author)In this study, the thermal management problem of the modern communication systems with small array sizes is addressed. A novel dual-functional active antenna design strategy is introduced for adjustable frequency of operation and cooling extension at millimeter-wave bands. The concept is based on placing different types of heatsinks on the same...conference paper 2023
- document
-
Lyu, D. (author), Straathof, C.A. (author), Soeiro, Thiago B. (author), Qin, Z. (author), Bauer, P. (author)A variable switching frequency modulation for the Dual Active Bridge (DAB) converter is proposed in this paper. With this variable switching frequency modulation, the DAB converter can be operated in the ZVS-beneficial operational modes without the necessity to transition to others, thus a larger ZVS range for the DAB converter can be...conference paper 2023
- document
-
Fu, A. (author), Lekić, A. (author), Kontis, Eleftherios O. (author), Malamaki, Kyriaki-Nefeli D. (author), Kryonidis, Georgios C. (author), Mauricio, Juan Manuel (author), Demoulias, Charis S. (author), Cvetkovic, M. (author)This paper deals with a systematic assessment of the power system frequency dynamics under high penetration of converter-interfaced renewable energy sources (CI-RESs). Specifically, the concept of the virtual synchronous generator (VSG) is implemented in the CI-RESs located at the transmission system (TS) side and/or the distribution network (DN...conference paper 2023