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Osman, M.E.A. (author), Viset, F.M. (author), Kok, M. (author)In this paper, a simultaneous localization and mapping algorithm for tracking the motion of a pedestrian with a foot-mounted inertial measurement unit is proposed. The algorithm uses two maps, namely, a motion map and a magnetic field map. The motion map captures typical motion patterns of pedestrians in buildings that are constrained by e.g....conference paper 2022
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Pearce, B.J. (author), Lieu, J. (author), Stavrakas, Vassilis (author), Tsopelas, Ilias (author), Ioannou, Anastasia (author), Dunphy, Niall (author), Xexakis, Georgios (author), Falcone, Gioia (author), Brenner-Fliesser, Michael (author), Schwarzinger, Stephan (author), Matowska, Malgorzata (author), Protopapdaki, Christina (author), Flamos, Alexandros (author)Achieving the European Union’s vision of climate neutrality by 2050 dictates the need to transform the role that citizens can play in decarbonizing the energy system. Yet, “which citizens to involve in this process,” “when to involve them,” and “how to do so fairly and effectively,” are questions that still remain unclear to both experts and...conference paper 2022
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Kirichek, Alex (author), Cronin, Katherine (author), de Wit, Lynyrd (author), Meshkati, Ebi (author), Pennekamp, Johan (author), Wijdeveld, Arjan J. (author), Sloff, C.J. (author)Water Injection Dredging (WID) has been successfully applied for removing sediment deposits in reservoirs, which results in an increase of their storage capacity. This dredging method is based on the fluidization of the top sediment layer by pressurized injection of water by a dredging vessel. The fluidized sediment can be transported towards...conference paper 2022
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Tajdinian, Mohsen (author), Behdani, B. (author), Goodarzi, Ali (author), Chamorro, Harold R. (author), Sood, Vijay K. (author)Fast internal detection and location in Shunt Ca-pacitor Banks (SCBs) can lead to the prevention of damages to other SCBs' elements and consequently avoid undesirable performance and effects in power system operation. This paper targets the performance of phasor-based algorithms of failure detection and fault location of SCBs. Being dependent on...conference paper 2022
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Tricarico, Gioacchino (author), Wagle, Raju (author), Dicorato, Maria (author), Forte, Giuseppe (author), Gonzalez-Longatt, Francisco (author), Rueda, José L. (author)The increasing penetration of renewable energy resources (RES) in transmission system operating conditions require a suitable test system and a dataset to cope with current issues. RES penetration remarkably affects day-ahead market outcomes regarding zonal prices and dispatched generation levels. For this purpose, zonal day-ahead energy market...conference paper 2022
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Lavaei, Abolfazl (author), Mohajerin Esfahani, P. (author), Zamani, Majid (author)In this work, we propose a data-driven approach for the stability analysis of discrete-time homogeneous nonlinear systems with unknown models. The proposed framework is based on constructing Lyapunov functions via a set of data, collected from trajectories of unknown systems, while providing an a-priori guaranteed confidence on the stability of...conference paper 2022
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Boricic, Aleksandar (author), Rueda, José L. (author), Popov, M. (author)To facilitate the increasing penetration of inverter-based resources, understanding and evaluating system strength becomes one of the central questions for the resilient operation of power systems. However, this is a very challenging and nuanced task, currently without a clear consensus in the industry and academia. This paper provides a...conference paper 2022
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Kalntis, M. (author), Iosifidis, G. (author)The design of Open Radio Access Network (O-RAN) compliant systems for configuring the virtualized Base Stations (vBSs) is of paramount importance for network operators. This task is challenging since optimizing the vBS scheduling procedure requires knowledge of parameters, which are erratic and demanding to obtain in advance. In this paper, we...conference paper 2022
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Piazzoni, Andrea (author), Vijay, Roshan (author), Cherian, Jim (author), Chen, Lyu (author), Dauwels, J.H.G. (author)The worldwide development of Autonomous Vehicles (AVs) has also encouraged the use of software simulators for virtual testing of AVs. However, the effectiveness of the AV simulators is constrained by numerous challenges, such as their computational cost and lack of fidelity in specific areas. In this paper, we describe the modality of virtual...conference paper 2022
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Dutta, Shamak (author), Wilde, N. (author), Smith, Stephen L. (author)We present a new mixed integer formulation for the discrete informative path planning problem in random fields. The objective is to compute a budget constrained path while collecting measurements whose linear estimate results in minimum error over a finite set of prediction locations. The problem is known to be NP-hard. However, we strive to...conference paper 2022
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Ghanipoor, Farhad Ghanipoor (author), Murguia, Carlos (author), Mohajerin Esfahani, P. (author), van de Wouw, Nathan (author)In this paper, we present a methodology for actuator and sensor fault estimation in nonlinear systems. The method consists of augmenting the system dynamics with an approximated ultra-local model (a finite chain of integrators) for the fault vector and constructing a Nonlinear Unknown Input Observer (NUIO) for the augmented dynamics. Then, fault...conference paper 2022
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Tsiangou, E. (author), Teixeira De Freitas, S. (author), Villegas, I.F. (author), Benedictus, R. (author)With its short heating times, ultrasonic welding is a highly promising technique for joining thermoplastic (TPC) to thermoset (TSC) composites, to prevent thermal degradation of the thermoset adherend. A neat thermoplastic coupling layer is co-cured on the surface to be welded to make the TSC “weldable”. For welding CF/PEEK to a TSC adherend,...conference paper 2020
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Koutras, N. (author), Villegas, I.F. (author), Benedictus, R. (author)The influence of the ultrasonic welding process parameters, namely the force and the vibration amplitude, on the crystallinity degree at the welding interface of CF/PPS (carbon fibre reinforced poly(phenylene) sulphide) joints is investigated. Two different sets of parameters, one representing high force and high vibration amplitude (1000 N,...conference paper 2020
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Kupski, J.A. (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author), Benedictus, R. (author)The goal of this study is to investigate new designs of composite bonded joints in order to improve their strength under tensile loading. Multiple stacked overlaps are compared with single overlap designs. The concept of multiple stacking is well known as ply-interleaving technique for co-curing dissimilar materials. For a secondary bonding...conference paper 2019
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Wang, W. (author), Poulis, J.A. (author), Teixeira De Freitas, S. (author), Zarouchas, D. (author)Adhesive bonding is a highly desirable joining technique to join composites to metals. The surfaces of both composite and metal substrates have to be carefully treated before bonding them together, in order to avoid interface failure between the adherend's surface and adhesive. This paper describes the surface pretreatments on carbon fiber...conference paper 2020
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Anand, C. (author), Groves, R.M. (author), Shroff, S. (author), Benedictus, R. (author)In this paper we ultrasonic signals from array transducers are simulated using the Thompson and Gray measurement model. The measurement model consists of a beam model, a system efficiency factor which characterizes the response of the electro-mechanical and electrical components of the system, and a flaw scattering model. To inspect layered...conference paper 2020
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Russo, R. (author), Chen, B. Y. (author)Cohesive Element (CE) is a well-established finite element for fracture, widely used for the modelling of delamination in composites. However, the computational time of CE-based method is prohibitive. This is because the steep and non-smooth stress gradient in the cohesive zone requires a very fine mesh. In this context, a new type of CE is...conference paper 2020
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Peeters, D.M.J. (author), Pagani, Alfonso (author), Augello, Riccardo (author), Carrera, Erasmo (author), do Prado, Alex Pereira (author), Cabral, Pedro Higino (author), dos Santos, Henrique E.A.A. (author)Representative stiffened panels are optimized such that multiple buckling modes and failure (using open hole allowables) occur within a range of 10% of the lowest buckling load. This implies the panels cannot be loaded up to the buckling load without risking failure, hence vibrational correlation testing was used to estimate the buckling loads...conference paper 2022
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Bianchi, M. (author), Grammatico, S. (author)We consider Nash equilibrium problems in a partial-decision information scenario, where each agent can only exchange information with some neighbors, while its cost function possibly depends on the strategies of all agents. We characterize the relation between several monotonicity and smoothness assumptions postulated in the literature....conference paper 2022
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Chaouach, L. (author), Boskos, D. (author), Oomen, T.A.E. (author)Ambiguity sets of probability distributions are a prominent tool to hedge against distributional uncertainty in stochastic optimization. The aim of this paper is to build tight Wasserstein ambiguity sets for data-driven optimization problems. The method exploits independence between the distribution components to introduce structure in the...conference paper 2022