Searched for: subject:"filtering"
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de Kanter, Daan (author)
Inertial Measurement Unit (IMU)-based motion capture has gained interest over the years due to its potential to measure human movement in the clinic and on the sports field at low cost. Still, IMU-based motion reconstruction remains a challenging task as these IMU measurements are corrupted by noise and bias. There have been many filtering and...
master thesis 2021
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Isufi, E. (author), Pocchiari, Matteo (author), Hanjalic, A. (author)
Graph convolutions, in both their linear and neural network forms, have reached state-of-the-art accuracy on recommender system (RecSys) benchmarks. However, recommendation accuracy is tied with diversity in a delicate trade-off and the potential of graph convolutions to improve the latter is unexplored. Here, we develop a model that learns...
journal article 2021
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Odriozola, Magela (author), Lousada Ferreira, M. (author), Spanjers, H. (author), van Lier, J.B. (author)
Fouling is a major challenge for the economic feasibility and applicability of membrane bioreactors. Several strategies have been proposed for fouling control, and among them, addition of flux enhancers (FE) have shown promising results. Previous research revealed a high variability of the required optimal dosage of FE for different types of...
journal article 2021
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Tatsis, K. E. (author), Dertimanis, V. K. (author), Papadimitriou, C. (author), Lourens, E. (author), Chatzi, E. N. (author)
This paper presents a general framework for estimating the state and unknown inputs at the level of a system subdomain using a limited number of output measurements, enabling thus the component-based vibration monitoring or control and providing a novel approach to model updating and hybrid testing applications. Under the premise that the...
journal article 2021
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Chen, L. (author), Zhai, Y. (author), van der Mark, Ed (author), Liu, G. (author), van der Meer, Walter (author), Medema, G.J. (author)
Slow sand filters (SSFs) are widely applied to treat potable water; the removal of contaminants (e.g., particles, organic matter, and microorganism) occurs primarily in the top layer. However, the development of the microbial community and its metabolic function is still poorly understood. In the present study, we analyzed the microbial...
journal article 2021
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Lei, Jintao (author), Qin, Z. (author), Li, Wuhua (author), Bauer, P. (author), He, Xiangning (author)
Shunt Active Power Filter (SAPF) is coupled with load admittance in weak grid conditions, which poses a challenge to stability analysis. In this paper, the admittance model of the SAPF is developed, which reveals the coupling mechanism between SAPF and load concisely and accurately. On top of that, the stability region of the system is...
journal article 2021
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Li, Minglei (author), Nan, L. (author)
The goal of urban building mesh simplification is to generate a compact representation of a building from a given mesh. Local smoothness and sharp contours of urban buildings are important features for converting unstructured data into solid models, which should be preserved during the simplification. In this paper, we present a general method...
journal article 2021
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Bluyssen, P.M. (author), Ortiz, Marco A. (author), Zhang, D. (author)
High efficiency air filtration has been suggested to reduce airborne transmission of ‘infectious’ aerosols. In this study the ‘air cleaning’ effect as well as the effect on sound and air velocity (draught risk) of a mobile High-Efficiency Particulate Air (HEPA) filter system was tested for different settings and positions in the Experience room...
journal article 2021
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Zangabad, Reza Pakdaman (author), Bosch, Johan G. (author), Mastik, Frits (author), Beurskens, Robert H.S.H. (author), Henneken, Vincent A. (author), Weekamp, Johannes W. (author), van der Steen, A.F.W. (author), van Soest, Gijs (author)
Intravascular ultrasound (IVUS) is a well-established diagnostic method that provides images of the vessel wall and atherosclerotic plaques. We investigate the potential for phased-array IVUS utilizing Coded Excitation (CE) for improving the penetration depth and image signal-to-noise ratio (SNR). It is realized on a new experimental...
journal article 2021
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Pasqualetto Cassinis, L. (author), Fonod, R. (author), Gill, E.K.A. (author), Ahrns, Ingo (author), Gil-Fernández, Jesús (author)
The relative pose estimation of an inactive spacecraft by an active servicer spacecraft is a critical task in the design of current and planned space missions, due to its relevance for close-proximity operations, such as In-Orbit Servicing and Active Debris Removal. This paper introduces a novel framework to enable robust monocular pose...
journal article 2021
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Lopez Restrepo, S. (author), Nino-Ruiz, Elias D. (author), Guzman-Reyes, Luis G. (author), Yarce, Andres (author), Quintero, O. L. (author), Pinel, Nicolas (author), Segers, Arjo (author), Heemink, A.W. (author)
In this paper, we propose an efficient and practical implementation of the ensemble Kalman filter via shrinkage covariance matrix estimation. Our filter implementation combines information brought by an ensemble of model realizations, and that based on our prior knowledge about the dynamical system of interest. We perform the combination of...
journal article 2021
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Henkel, Martin (author)
Certain Formation Flying missions rely on their orbital control thrusters to maintain the formation, making a Fault Detection and Isolation (FDI) system that is capable of detecting thruster faults very valuable. In addition, communication between satellites in a formation can be expensive. In this thesis, a distributed FDI approach was...
master thesis 2020
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De Jonghe, Thomas (author)
High performance continuous fiber-reinforced composites are becoming increasingly important in the aerospace industry. In these structures, internal damage is often created and propagated throughout the lifetime, having a negative impact on the structural properties. In order to allow for condition-based maintenance, there is a need for reliable...
master thesis 2020
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Roy Choudhury, Shashank (author)
Permanent Magnet Synchronous Machine have found their way into more applications due to their high power and torque density and high efficiency. The PWM schemes used to generate the voltage signals for the machine consist of high frequency trapezoidal signals, when not filtered. These high frequency signals when directly applied to the machine...
master thesis 2020
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Benders, Dennis (author)
Recent developments in neuroscience research, mainly introduced by neuroscientist Karl J. Friston, have resulted in a concept called the Free Energy Principle (FEP). The FEP is a brain theory unifying action, perception and learning. An important observation is that autonomous robots have to perform similar tasks to the human brain. Therefore,...
master thesis 2020
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van Ingen, Bart (author)
Pedestrian indoor localization is a problem yet to have a solution that is as generally accepted as the Global Positioning System is for outdoor localization. An infrastructure-independent option is to leverage the data from Inertial Measurement Unit (IMU) sensors to determine position. An advantage of this approach is that these sensors are...
master thesis 2020
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Alforja Ruiz, Iñigo (author)
Space debris is becoming one of the major risks to be suffered by operating and future space missions. Recent studies show that the number of potentially hazardous uncontrolled orbital bodies is growing with time, increasing the probability of impact with operational satellites. To counteract this problem, several studies are being suggested to...
master thesis 2020
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Solanki, Prashant (author)
Quadcopters are becoming increasingly popular across diverse sectors such as mapping, photography, or surveillance. Since rotor damages occur frequently, it is essential to improve the attitude estimation and thus ultimately the ability to control a damaged quadcopter. The Control and Simulation group of TU Delft developed a quadcopter...
master thesis 2020
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Tsiakos, D. (author)
This project investigates the newly proposed Belgian Rectifier, a novel three-phase boost power factor correction rectifier which is advantageous for AC-to-DC conversion in applications, such as, off-board and on-board chargers for electric vehicles. The Belgian rectifier can achieve very high levels of efficiency<br/>and power density, while...
master thesis 2020
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Barad, K.R. (author)
Autonomous vision-based navigation is a crucial element for space applications involving a potentially uncooperative target, such as proximity operations for on-orbit servicing or active debris removal. Due to low mass and power characteristics, monocular vision sensors are an attractive choice for onboard vision-based navigation systems. This...
master thesis 2020
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