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Götz, Paula (author), Auping, Willem L. (author), Hinrichs-Krapels, S. (author)Background: Health systems worldwide struggled to obtain sufficient personal protective equipment (PPE) and ventilators during the COVID-19 pandemic due to global supply chain disruptions. Our study’s aim was to create a proof-of-concept model that would simulate the effects of supply strategies under various scenarios, to ultimately help...journal article 2024
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Ghisolfi, Verônica (author), Tavasszy, Lorant (author), Correia, Gonçalo (author), de Lorena Diniz Chaves, Gisele (author), Mattos Ribeiro, Glaydston (author)Freight transport decarbonization is challenging due to the slow implementation of policies to meet climate goals. This paper analyzes the dynamics of the implementation of freight decarbonization measures. A System Dynamics model was developed and applied to the Brazilian freight system to simulate the use of more sustainable modes and means...journal article 2024
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Gürsan, C. (author), de Gooyert, V. (author), de Bruijne, M.L.C. (author), Raaijmakers, J. (author)District heating systems are considered a feasible heating alternative to replace natural gas to mitigate emissions in cities. However, urban transitions are very complex because energy systems often operate in densely populated areas, which gives rise to all kinds of interdependencies in cities. These interdependencies can result in...journal article 2024
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Moeis, Armand Omar (author), Gita, Agatha Ayu (author), Destyanto, A.R. (author), Rahman, Irvanu (author), Hidayatno, Akhmad (author), Zagloel, Teuku Yuri (author)Special Economic Zone (SEZ) development is becoming a preferable policy by the Indonesian government to boost economic growth in less-developed local regions. This is because of the promise that SEZ could attract investment and job creation based on local competitive commodities. One of these areas is Bitung SEZ, North Sulawesi - Indonesia, a...journal article 2024
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Nassar, Raphael Ferrari (author), Ghisolfi, Verônica (author), Annema, J.A. (author), van Binsbergen, A.J. (author), Tavasszy, Lorant (author)The decarbonization of freight transport is currently a big challenge to tackle. One way of decarbonizing the sector is the modal shift towards the least polluting transport modes. This research aims to shed light on modal shift time dynamics in developing economies and considers whether a System Dynamics approach can assist with the policy...journal article 2023
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Horvat, Andrijana (author), Luning, Pieternel A. (author), DiGennaro, Catherine (author), Rommens, H.C.M. (author), van Daalen, C. (author), Koene, Miriam (author), Jalali, Mohammad S. (author)Intestinal campylobacteriosis, caused by Campylobacter ingestion, is the most reported zoonosis in the EU; it is societally costly and can lead to more severe sequelae. To reduce Campylobacter infections, biosecurity measures at both farms and slaughterhouses are warranted. However, the potential improvements achieved by these interventions have...journal article 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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Sun, B. (author), Mkhoyan, T. (author), van Kampen, E. (author), De Breuker, R. (author), Wang, Xuerui (author)Morphing structures have acquired much attention in the aerospace community because they enable an aircraft to actively adapt its shape during flight, leading to fewer emissions and fuel consumption. Researchers have designed, manufactured, and tested a morphing wing named SmartX-Alpha, which can actively alleviate loads while achieving the...journal article 2022
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van Oorschot, Kim E. (author), Akkermans, Henk A. (author), Van Wassenhove, Luk N. (author), Wang, Y. (author)Purpose: Due to the complexity of digital services, companies are increasingly forced to offer their services “in permanent beta”, requiring continuous fine-tuning and updating. Complexity makes it extremely difficult to predict when and where the next service disruption will occur. The authors examine what this means for performance measurement...journal article 2022
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Setiawan, Andri D. (author), Dewi, Marmelia P. (author), Jafino, B.A. (author), Hidayatno, Akhmad (author)Geothermal is vital for sustainably meeting Indonesia's energy demand, given its estimated massive reserves potential equivalent to 24 GW of electricity. The Indonesian government has set geothermal contributions to the national energy mix at 7,241.5 MW by 2025 and 17,546 MW by 2050, despite harnessing such vast potential needing significant...journal article 2022
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Kon, Johan (author), Bruijnen, Dennis (author), van de Wijdeven, Jeroen (author), Heertjes, Marcel (author), Oomen, T.A.E. (author)Unknown nonlinear dynamics can limit the performance of model-based feedforward control. The aim of this paper is to develop a feedforward control framework for systems with unknown, typically nonlinear, dynamics. To address the unknown dynamics, a physics-based feedforward model is complemented by a neural network. The neural network output in...conference paper 2022
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Pan, K. (author), Palensky, P. (author), Mohajerin Esfahani, P. (author)The main objective of this article is to develop scalable dynamic anomaly detectors with high-fidelity simulators of power systems. On the one hand, models in high-fidelity simulators are typically 'intractable' if one opts to describe them in a mathematical formulation in order to apply existing model-based approaches from the anomaly...journal article 2022
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Wu, Jiansong (author), Zhang, Linlin (author), Bai, Yiping (author), Reniers, G.L.L.M.E. (author)In recent years, frequent large-scale power grid accidents have caused serious economic losses and bad social impact, which has drawn great attention from power grid enterprises. As one of the key elements of production, safety investment plays an important role in improving the safety level and reducing accident loss. In this paper, System...journal article 2022
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Sarafraz, Mohammad Saeed (author), Proskurnikov, Anton V. (author), Tavazoei, Mohammad Saleh (author), Mohajerin Esfahani, P. (author)In this article, we investigate the problem of practical output regulation, i.e., to design a controller that brings the system output in the vicinity of a desired target value while keeping the other variables bounded. We consider uncertain systems that are possibly nonlinear and the uncertainty of their linear parts is modeled element wise...journal article 2022
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Roy, Spandan (author), Baldi, S. (author), Li, Peng (author), Narayanan, Viswa (author)Artificial-delay control is a method in which state and input measurements collected at an immediate past time instant (i.e. artificially delayed) are used to compensate the uncertain dynamics affecting the system at the current time. This work formulates an artificial-delay control method with adaptive gains in the presence of nonlinear ...journal article 2021
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Wu, Chengwei (author), Yao, Weiran (author), Pan, W. (author), Sun, Guanghui (author), Liu, Jianxing (author), Wu, Ligang (author)This article investigates the secure control problem for cyber-physical systems when the malicious data are injected into the cyber realm, which directly connects to the actuators. Based on moving target defense (MTD) and reinforcement learning, we propose a novel proactive and reactive defense control scheme. First, the system (A,B) is...journal article 2021
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Daniel, D. (author), Prawira, Julivius (author), Djono, Trimo Pamudji Al (author), Subandriyo, S. (author), Rezagama, Arya (author), Purwanto, Aries (author)The sustainability of the water supply program in developing countries is influenced by many inter-linked and dynamic factors, suggesting the need to analyse the system behaviour of the water supply program. However, no study analyses factors influencing the sustainability of rural drinking water supply programs holistically, and this study...journal article 2021
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Wu, C. (author), Pan, W. (author), Sun, Guanghui (author), Liu, Jianxing (author), Wu, Ligang (author)This paper investigates the problem of optimal tracking control for cyber-physical systems (CPS) when the cyber realm is attacked by denial-of-service (DoS) attacks which can prevent the control signal transmitting to the actuator. Attention is focused on how to design the optimal tracking control scheme without using the system dynamics and...journal article 2021
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Fu, W. (author), van Paassen, M.M. (author), Mulder, Max (author)Limitations of a haptic device can cause distortions of the force feedback it presents. Just-noticeable difference (JND) in system dynamics is important for creating transparent haptic interaction. Based on the previous work, this article presents a unified model that extends the existing JND rule. Our approach projects the JNDs in the...journal article 2020
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Papachristos, George (author), van de Kaa, G. (author)Standards competition is a complicated process influenced by a large number of factors and mechanisms. This article develops a simulation model that draws on current theory of standards competition dynamics and represents the interplay of strategic factors that firms can use to gain a competitive advantage. The model is used to reproduce four...review 2020
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