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van Meer, M. (author), Witvoet, G. (author), Oomen, T. (author)Switched reluctance motors are appealing because they are inexpensive in both construction and maintenance. The aim of this paper is to develop a commutation function that linearizes the nonlinear motor dynamics in such a way that the torque ripple is reduced. To this end, a convex optimization problem is posed that directly penalizes torque...article 2022
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Cox, P.B. (author), van Rossum, W.L. (author)Recent advances in digital beam forming for phased arrays in combination with digital signal processing should enable the development of multibeam radar in a bistatic configuration. In the bistatic setting, the pulse travelling outward from the transmitter should be followed or “chased” by the receiver. During transmission, depending on the...conference paper 2020
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- Tajdari, F. (author), Berkhoff, A.P. (author), van der Zee, R.A.R. (author), de Boer, A. (author) article 2020
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- Mohamed, S. (author), Goswami, D. (author), Nathan, V. (author), Rajappa, R. (author), Basten, T. (author) article 2020
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- Geilen, M.C.W. (author), Skelin, M. (author), van Kampenhout, J.R. (author), Ara, H.A. (author), Basten, T. (author), Stuijk, S. (author), Goossens, K.G.W. (author) bookPart 2020
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Kramer, L. (author), Peters, J. (author), Voorhoeve, R.J. (author), Witvoet, G. (author), Kuiper, S. (author)The demand for higher data transfer between satellites and ground stations is ever increasing. To address this, (free-space) optical communication (OC) technology is emerging. Pointing mechanisms with low size, weight and power (SWaP), high accuracy and low recurring costs are key enablers for constellations of OC systems. In this paper, TNO...conference paper 2020
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Venkita, S.R. (author), Willemsen, D. (author), Alirezaei, M. (author), Nijmeijer, H. (author)One of the main safety concerns associated with semi-autonomous vehicles is the sharing of control between a human driver and an autonomous driving system. Even with an attentive driver, such switches in control may pose a threat to the safety of the driver and the surrounding vehicles. The aim of this study is to develop an indicator that can...article 2019
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Ananduta, W. (author), Pippia, T. (author), Ocampo-Martinez, C. (author), Sijs, J. (author), de Schutter, B. (author)A novel partitioning approach for linear switching large-scale systems is presented. We assume that the modes of the switching system are unknown a priori but can be detected. We propose an online partitioning scheme that can partition the system when the mode switches, thus adapting the partition to the mode. Moreover, after the system has been...article 2019
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Tajdari, F. (author), Berkhoff, A.P. (author), de Boer, A. (author)This paper studies an acoustic source with a relatively small thickness and high bending stiffness. Piezoelectric actuators are used to drive the moving component of the acoustic source. In the current study, a lumped model is used to represent the acoustic source that is excited by a piezoelectric stacked actuator. The equivalent electrical...conference paper 2018
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Turkovic, B. (author), Kuipers, F. (author), van Adrichem, N.L.M. (author), Langendoen, K. (author)Along with exciting visions for 5G communications and the Tactile Internet, the networking requirement of attaining extremely low end-to-end latency has appeared. While network devices are typically equipped with buffers to counteract packet loss caused by short-lived traffic bursts, the more those buffers get filled, the more delay is added to...conference paper 2018
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Indrajuana, A. (author), Bekdemir, C. (author), Feru, E. (author), Willems, F. (author)The operation of a dual fuel combustion engine using combustion mode-switching offers the benefit of higher thermal efficiency compared to single-mode operation. For various fuel combinations, the engine research community has shown that running dual fuel engines in Reactivity Controlled Compression Ignition (RCCI) mode, is a feasible way to...conference paper 2018
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Ba, A. (author), van den Heuvel, J. (author), Mateman, P. (author), Zhou, C. (author), Busze, B. (author), Song, M. (author), He, Y. (author), Ding, M. (author), Dijkhuis, J. (author), Tiurin, E. (author), Madampu, S. (author), Boer, P. (author), Traferro, S. (author), Zhang, Y. (author), Liu, Y.-H. (author), Bachmann, C. (author), Philips, K. (author)A WiFi (IEEE 802.11g) and BLE combo transmitter (TX) for IoT applications is presented. A wideband digital polar architecture consisting of an all-digital PLL-based frequency modulator and a switched-capacitor digitally-controlled PA achieves optimal energy efficiency for both WiFi and BLE. The dynamic FM correction and AM alias suppression...conference paper 2018
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Zhao, D. (author), Lenz, T. (author), Katsouras, I. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)In this work, the macroscopic polarization of a ferroelectric capacitor is correlated with the local domain morphology. To this end, a ferroelectric capacitor of the random copolymer poly(vinylidenefluoride-trifluoroethylene) [P(VDF-TrFE)] is poled to a set polarization state in a Sawyer-Tower setup. After chemically removing the top electrode,...article 2017
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van Heijningen, M. (author), de Hek, A.P. (author), Dourlens, C. (author), Fellon, P. (author), Adamiuk, G. (author), Ayllon, N. (author), van Vliet, F.E. (author)This paper presents the design and measurement results of a single-chip front-end monolithic microwave integrated circuit (MMIC), incorporating a high-power amplifier, transmit– receive switch, low-noise amplifier, and calibration coupler,realized in 0.25 μm AlGaN/GaN-on-SiC MMIC technology of UMS (GH25-10). The MMIC is operating in C-band (5.2...article 2017
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Soer, M.C.M. (author), Klumperink, E.A.M. (author), van den Broek, D.J. (author), Nauta, B. (author), van Vliet, F.E. (author)Spatial interference rejection in analog adaptive beamforming receivers can improve the distortion performance of the circuits following the beamforming network, but is susceptible to the nonlinearity of the beamforming network itself. This paper presents an analysis of intermodulation product cancellation in analog active phased array receivers...article 2017
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Calvert, S.C. (author), Rypkema, J. (author), Holleman, B. (author), Azulay, D. (author), de Jong, A. (author)This study investigates different methods to visualise uncertainty in static representations of probabilistic traffic models predictions on road-networks. Although various graphical cues may be used to represent uncertainty it is not a priori clear which of them are most suited for this purpose, since their legibility, intelligibility and the...article 2017
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Khikhlovskyi, V. (author), van Breemen, A.J.J.M. (author), Janssen, R.A.J. (author), Gelinck, G.H. (author), Kemerink, M. (author)Solution-processed organic ferroelectric resistive switches could become the long-missing non-volatile memory elements in organic electronic devices. To this end, data retention in these devices should be characterized, understood and controlled. First, it is shown that the measurement protocol can strongly affect the 'apparent' retention time...article 2016
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Kaustubh, M. (author), Willemsen, D.M.C. (author), Mazo, M. (author)Proponents of autonomous driving pursue driverless technologies, whereas others foresee a gradual transition where there will be automated driving systems that share the control of the vehicle with the driver. With such advances it becomes pertinent that the developed automated systems need to be safe. One crucial aspect of safety is to prove...conference paper 2016
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Gao, H. (author), Ying, K. (author), Matters-Kammerer, M.K. (author), Harpe, P. (author), Wang, B. (author), Liu, B. (author), Serdijn, W.A. (author), Baltus, P.G.M. (author)A 5-bit digital controlled switch-type passive phase shifter realised in a 40 nm digital CMOS technology without ultra-thick metals for the 60 GHz Industrial, Scientific and Medical (ISM) band is presented. A patterned shielding with electromagnetic bandgap structure and a stacked metals method to increase the on-chip inductor quality factor are...article 2016
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Kasparek, W. (author), Doelman, N.J. (author), Stober, J. (author), Maraschek, M. (author), Zohm, H. (author), Monaco, F. (author), Eixenberger, H. (author), Klop, W.A. (author), Wagner, D. (author), Schubert, M. (author), Schütz, H. (author), Grünwald, G. (author), Plaum, B. (author), Munk, R. (author), Schlüter, K.H. (author)At the tokamak ASDEX Upgrade, experiments to stabilize neoclassical tearing modes (NTMs) by electron cyclotron (EC) heating and current drive in the O-points of the magnetic islands were performed. For the rst time, injection into the O-points of the revolving islands was performed via a fast directional switch, which toggled the EC power...article 2016