Searched for: subject%3A%22Resonant%255C+frequences%22
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Lomans, Gabriël (author)
Extremely large telescopes (ELTs) are expected to be one of the most promising astronomical observation instruments when it comes to observing exoplanets. During observations, however, Earth’s atmosphere introduces optical distortion, which needs to be corrected. For this reason, a wavefront sensor (WFS) will be developed that comprises a 100 ⇥...
bachelor thesis 2023
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Zhu, G. (author), Dong, J. (author), Grazian, F. (author), Bauer, P. (author)
This article presents a parameter recognition-based impedance tuning method for the impedance mismatch caused by capacitance drift and coil misalignment in series-series-compensated wireless power transfer (WPT) systems. First, a parameter recognition method is proposed to identify the unknown parameters of the resonant circuits by only...
journal article 2023
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Liu, Hanqing (author), Basuvalingam, Saravana B. (author), Lodha, S.V. (author), Bol, Ageeth A. (author), van der Zant, H.S.J. (author), Steeneken, P.G. (author), Verbiest, G.J. (author)
Atomic layer deposition (ALD), a layer-by-layer controlled method to synthesize ultrathin materials, provides various merits over other techniques such as precise thickness control, large area scalability and excellent conformality. Here we demonstrate the possibility of using ALD growth on top of suspended 2D materials to fabricate...
journal article 2023
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Cai, Z. (author), Wiertlewski, M. (author)
The sensation of touching virtual texture and shape can be provided to a touchscreen user by varying the friction force. Despite the saliency of the sensation, this modulated frictional force is purely passive and strictly opposes finger movement. Therefore, it is only possible to create forces along the direction of movement and this...
journal article 2023
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Feddersen, Theresa V. (author), Poot, Dirk H.J. (author), Paulides, Margarethus M. (author), Salim, Ghassan (author), van Rhoon, G.C. (author), Hernandez-Tamames, J.A. (author)
Purpose: MR thermometry (MRT) enables noninvasive temperature monitoring during hyperthermia treatments. MRT is already clinically applied for hyperthermia treatments in the abdomen and extremities, and devices for the head are under development. In order to optimally exploit MRT in all anatomical regions, the best sequence setup and post...
journal article 2023
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Wanningen, Nicky (author)
For scaling up the qubits in silicon quantum computers, it is vital to determine crosstalk effects that can lower the fidelity of the computer. <br/>In this computational project, we examine single-qubit gate-fidelities in the presence of crosstalk for uncoupled spin qubits that are driven with X-gates via electron dipole spin resonance (EDSR)....
bachelor thesis 2022
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Roose, Thomas (author), Lekić, A. (author), Alam, Mohammad Meraj (author), Beerten, Jef (author)
This paper analyzes high-frequency interactions between a Modular Multilevel Converter (MMC) and High Voltage Direct Current (HVDC) grid resonances by studying their effect on the system stability. The recent appearance of converter-related instabilities due to high-frequency oscillations at the converter's ac side raises concerns about whether...
journal article 2020
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van den Bos, Ruben (author), Bokhorst, Rik (author)
This thesis presents a resonant sensor circuit design that converts the deformation of a load cell in a conveyor belt into a change in resonance frequency. The sensor is inductively coupled to a reader circuit using planar PCB inductor coils. A sensor circuit was designed, fitted on a square PCB with 14.14 mm side length. The circuit consists of...
bachelor thesis 2020
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van Heteren, Mauries (author), Dijkstra, Jonathan (author)
In this thesis, the design of a frequency analysis system for conveyor belt weighing systems is designed. The objective of the thesis is to detect a change in resonance frequency, caused by a change of pressure applied to a sensor. The design features a resolution of 10 000 discrete frequency levels in a bandwidth of 0.5 MHz. Noise division of a...
bachelor thesis 2020
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Belardinelli, P. (author), D Souza, Savio (author), Verlinden, E.J. (author), Wei, J. (author), Staufer, U. (author), Alijani, F. (author), Ghatkesar, M.K. (author)
Suspended microfluidic resonators enable detection of fluid density and viscosity with high sensitivity. Here, a two-legged suspended microchannel resonator that probes pico-litres of liquid is presented. The higher resonant modes (flexural and torsional) were explored for increased sensitivity and resolution. Unlike other reported microchannel...
journal article 2020
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Wu, Y. (author), Shekhar, A. (author), Soeiro, Thiago B. (author), Bauer, P. (author)
Back-To-Back (B2B) Voltage Source Converter (VSC) with AC-side LCL filters can be adopted for parallel AC-DC distribution links. In this paper, Grid-side Current Control (GCC) for the inner/fast control loops of the front- and backend power electronics are implemented in order to enhance the system performance against grid disturbances. Herein,...
conference paper 2019
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D Souza, Savio (author)
Micro and Nano-mechanical resonators are becoming increasingly ubiquitous in the areas of particle characterization and biological sensing. For biological sensing, however, the presence of a liquid environment is a pre-requisite. Hollow cantilevers, which allow fluids to be transported inside the resonator, often have high quality factors even...
master thesis 2018
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van der Lingen, Elke (author), van Leenen, Ryan (author)
The cleaning company "VETkanaal" requested a sensor system that measures the thickness of a grease layer within kitchen extraction ducts independently and is able to send this to an online platform. The goal of this project is to find an acoustic implementation of the sensor and be able to apply it. It appeared that measuring a shift in...
bachelor thesis 2018
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Schormans, Matthew (author), Valente, V. (author), Demosthenous, Andreas (author)
Wireless sensing systems are becoming popular in a range of applications, particularly in the case of biomedical circuits and food monitoring systems. A typical wireless sensing system, however, may require considerable complexity to perform the necessary analog to digital conversion and subsequent wireless transmission. Alternatively, in the...
journal article 2018
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Vogel, J.G. (author), Chaturvedi, V. (author), Nihtianova, S. (author)
Unlike capacitive displacement sensors, Eddy-Current Displacement Sensors (ECDSs) possess an inherently low sensitivity to environmental conditions, such as the humidity of the ambient air. By elevating the excitation frequency it is possible to mitigate their major limitations regarding stability and resolution, making them of interest for high...
conference paper 2017
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Liu, Z. (author), Chen, Kai (author), Li, Z. (author), Jiang, X. (author)
Fiber-reinforced polymer (FRP) has been increasingly applied to steel structures for structural strengthening or crack repair, given its high strength-to-weight ratio and high stiffness-to-weight ratio. Cracks in steel structures are the dominant hidden threats to structural safety. However, it is difficult to monitor structural cracks under...
journal article 2017
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Zong, Z. (author), Babaie, M. (author), Staszewski, R.B. (author)
This paper proposes a mm-wave frequency generation technique that improves its phase noise (PN) performance and power efficiency. The main idea is that a fundamental 20 GHz signal and its sufficiently strong third harmonic at 60 GHz are generated simultaneously in a single oscillator. The desired 60 GHz local oscillator (LO) signal is delivered...
journal article 2016
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Van Dorp, D.J.J. (author)
The electrical actuation of suspended membrane nanomechanical resonators incorporated into a laser interferometer displacement setup was investigated. Graphene and MoS2 membranes have been used to show electrical actuation of both metals and semiconductors. The method to fabricate devices was optimized and the properties of the fabricated...
master thesis 2015
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Iervolino, E. (author), Riccio, M. (author), Van Herwaarden, A.W. (author), Irace, A. (author), Breglio, G. (author), Van der Vlist, W. (author), Sarro, P.M. (author)
This paper investigates the temperature dependence of the resonance frequency of thermogravimetric (TG) devices for tip heating over the temperature range of View the MathML source 25–600?C. The resonance frequency of a fabricated TG device shows to be temperature independent for tip heating up to about View the MathML source600?C. This allows a...
journal article 2010
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Sadeghian, H. (author), Goosen, J.F.L. (author), Bossche, A. (author), Van Keulen, F. (author)
Submicron cantilever structures have been demonstrated to be extremely versatile sensors and have potential applications in physics, chemistry and biology. The basic principle in submicron cantilever sensors is the measurement of the resonance frequency shift due to the added mass of the molecules bound to the cantilever surface. This paper...
conference paper 2008
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