Article
Computer Science, Interdisciplinary Applications
Robert Braun, Dag Fritzson
Summary: Modeling and simulation are important for efficient product development, but co-simulation is often limited by performance and numerical instability. Transmission line modeling (TLM) is a suitable method to achieve stability by using time delays. The Functional Mock-up Interface (FMI) is the most established standard for tool coupling, and the next version can be used with TLM. Research shows that stability can be improved by reducing communication step size and adding an intermediate update mode.
SIMULATION-TRANSACTIONS OF THE SOCIETY FOR MODELING AND SIMULATION INTERNATIONAL
(2022)
Article
Energy & Fuels
Santiago Riquelme, Adrien Gros, Bruno Klemz, Luis Mauro Moura, Nathan Mendes
Summary: This study proposes a method to simulate building-integrated photovoltaic glazing systems using semitransparent organic photovoltaic elements. The method uses a mathematical cosimulation model that considers heat transfer and is based on a functional mock-up unit developed in Python and the building simulation program Domus. The cosimulation model was verified and showed promising results, with each 6-m(2) glazing generating around 77 W of power, equivalent to 9% of available solar resource.
Article
Engineering, Electrical & Electronic
M. Elsotohy, J. Jaeschke, F. Sehr, M. Schneider-Ramelow
Summary: This paper introduces a framework for creating digital twins by combining different modeling techniques to create an integrated model of a complex electronic system for automotive and railway applications. The framework allows monitoring and diagnosing the behavior of the electronic system in the field. The framework also contributes to the development of digital twins by adding black-box modules to the simulation models. The paper highlights the key features and functionalities of this approach for simulating digital twins.
MICROELECTRONICS RELIABILITY
(2023)
Article
Engineering, Aerospace
Lorenzo Olivieri, Cinzia Giacomuzzo, Alessandro Francesconi
Summary: Current empirical models used to predict spacecraft breakup are based on ground experiments and observation of debris cloud generated by collision events. With the increasing number of resident objects orbiting the Earth and their risk to operational satellites, there has been a growing interest in collecting new test data, improving current breakup models, and developing new ones. The University of Padova conducted impact simulations on satellite mock-ups with different shapes and internal components to study the fragmentation characteristics under different impact conditions.
Proceedings Paper
Computer Science, Interdisciplinary Applications
Christian Moldrup Legaard, Daniella Tola, Thomas Schranz, Hugo Daniel Macedo, Peter Gorm Larsen
Summary: Developing independent simulation units for use in FMI settings is challenging and may require implementing FMUs from scratch with a deep technical understanding. UniFMU is a tool that enables implementing FMUs in any language and provides both graphical user interface and command-line interface features.
PROCEEDINGS OF THE 11TH INTERNATIONAL CONFERENCE ON SIMULATION AND MODELING METHODOLOGIES, TECHNOLOGIES AND APPLICATIONS (SIMULTECH)
(2021)
Article
Energy & Fuels
Loan Tullio F. W. da Silva, Marcelo Aroca Tomim, Pedro Gomes Barbosa, Pedro Machado de Almeida, Robson Francisco da Silva Dias
Summary: This paper presents the development of a wind energy conversion system co-simulation based on the Functional Mock-up Interface standard, aiming to contribute to the development of co-simulation of large electrical power systems using open-source and standardized computational tools.
Proceedings Paper
Engineering, Electrical & Electronic
Yonghua Chen, Wei Li, Bingwen Wang, Yanfei Li, Junda Wu, Xiaopeng Fu
Summary: The Integrated Energy System (IES) integrates various energy forms such as electricity, gas, and heating. Simulation studies of IES face practical challenges due to the different network operation modes and complex coupling relationship of various energy sources. A co-simulation approach is proposed to coordinate existing simulation codes from individual domains. This approach uses different simulation steps for electrical network transient simulation and gas-heat network dynamic simulation, and a high-speed communication module is designed to interact and exchange data between simulation processes.
2022 4TH INTERNATIONAL CONFERENCE ON SMART POWER & INTERNET ENERGY SYSTEMS, SPIES
(2022)
Article
Materials Science, Multidisciplinary
Wenqian Wu, Mingyu Gong, Bingqiang Wei, Amit Misra, Jian Wang
Summary: Al-Si cast alloys composed of alpha-Al and Al-Si eutectic often do not show significant improvement in mechanical properties due to Si flakes. The weak strengthening effect of Si flakes may be attributed to the low shear resistance and easy interaction of dislocations with Al-Si interfaces, leading to a decrease in the repulsive force on approaching dislocations and weakening the strengthening effect of Si flakes.
Article
Nuclear Science & Technology
Jiahao Li, R. Ragona, Yuntao Song, Qingxi Yang, Chao Yu, J. Hillairet, T. Batal, J. M. Bernard, Zhaoxi Chen, Hao Xu, Jian Chen, Shilin Chen, Ning Li
Summary: The paper discusses the challenges and solutions of using a Travelling Wave Array antenna in tokamak auxiliary heating, presenting the design characteristics and RF analysis of the TWA mock-up, along with testing and evaluation processes.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Chemistry, Physical
Filippo Balzaretti, Verena Gupta, Lucio Colombi Ciacchi, Balint Aradi, Thomas Frauenheim, Susan Koeppen
Summary: The reactive interaction of water with rutile remains a challenge to atomistic modeling techniques, but can be partly described by density functional tight binding. However, improvements are needed to accurately predict the low dissociation propensity of H2O. A reliable description of water surface reactivity is crucial for understanding the nonstoichiometric reconstruction of the Ti-rich (001) facet.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Physics, Multidisciplinary
Hong-bo Cai, Xin-xin Yan, Pei-lin Yao, Shao-ping Zhu
Summary: This study presents a new framework to simulate shock waves and hydrodynamic instabilities in high-density plasmas, with ions modeled using particle-in-cell method and electrons as a massless fluid. It investigates turbulent mixing between light and heavy plasmas initiated by shock waves, revealing the role of self-generated electromagnetic fields in late-time plasma mixing. The proposed method is able to describe shock-driven hydrodynamic instabilities involving mixing and electromagnetic fields at the interface in plasma.
MATTER AND RADIATION AT EXTREMES
(2021)
Article
Engineering, Electrical & Electronic
Igor Borges de Oliveira Chagas, Marcelo Aroca Tomim
Summary: Co-simulation in power systems is a powerful tool for dynamic studies, accurately reproducing results of the complete system and reducing computational time.
ELECTRIC POWER SYSTEMS RESEARCH
(2022)
Article
Physics, Fluids & Plasmas
Rodica Borcia, Ion Dan Borcia, Michael Bestehorn, Deewakar Sharma, Sakir Amiroudine
Summary: This study proposes an extended scheme based on the phase field model to investigate immiscible/miscible liquids. The research finds that the liquids are immiscible below the critical temperature and perfectly miscible above it. Numerical simulations reveal the behavior of liquid mixtures and droplets in temperature gradients.
PHYSICAL REVIEW FLUIDS
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Maghsoudi-Ganjeh, Liqiang Lin, Xingzi Yang, Xiaowei Zeng
Summary: This paper presents 3D computational modeling and simulation of a hybrid nanocomposite mimicking nacre's ultrastructure, where stiff mineral tablets are bonded by soft organic matrices. The finite element analysis and experimental validation investigate the mechanical properties and damage modes of the composite, as well as the effect of microstructural features on the elastic modulus.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Astronomy & Astrophysics
Shengqi Yang, Rachel S. Somerville, Anthony R. Pullen, Gergo Popping, Patrick C. Breysse, Abhishek S. Maniyar
Summary: Submillimeter emission lines are important for tracing the cold gas and ionized environments of galaxies, and for future line intensity mapping surveys. Physics-based simulations predicting emission lines from different interstellar medium phases are crucial for understanding galaxy physical conditions. This study presents a framework for creating mock submillimeter line intensity maps and shows significant differences in predicted star formation rate and line emission scaling relations compared to empirical relations. These differences impact key summary statistics used in intensity mapping, emphasizing the need for realistic models in forecasting the capabilities of future surveys.
ASTROPHYSICAL JOURNAL
(2021)
Article
Computer Science, Theory & Methods
Christian Legaard, Thomas Schranz, Gerald Schweiger, Jan Drgona, Basak Falay, Claudio Gomes, Alexandros Iosifidis, Mahdi Abkar, Peter Larsen
Summary: Dynamical systems are extensively used in natural sciences and engineering disciplines. While simple systems can be described by differential equations derived from fundamental physical laws, more complex systems require data-driven modeling approaches. This article surveys the use of neural networks to construct models of dynamical systems, reviews related literature, identifies significant challenges, and discusses promising research areas.
ACM COMPUTING SURVEYS
(2023)
Article
Computer Science, Software Engineering
Simon Thrane Hansen, Casper Thule, Claudio Gomes, Jaco van de Pol, Maurizio Palmieri, Emin Oguz Inci, Frederik Madsen, Jesus Alfonso, Jose Angel Castellanos, Jose Manuel Rodriguez
Summary: Simulation-based analyses are crucial for the development of cyber-physical systems, and co-simulation is a technique that couples specialized simulation tools through an orchestration algorithm. This paper focuses on verifying and synthesizing orchestration algorithms that respect the contracts of simulation tool implementations, specifically for complex and adaptive co-simulation scenarios.
INTERNATIONAL JOURNAL ON SOFTWARE TOOLS FOR TECHNOLOGY TRANSFER
(2022)
Article
Computer Science, Information Systems
Simon Thrane Hansen, Claudio Angelo Goncalves Gomes, Masoud Najafi, Torsten Sommer, Matthias Blesken, Irina Zacharias, Oliver Kotte, Pierre R. Mai, Klaus Schuch, Karl Wernersson, Christian Bertsch, Torsten Blochwitz, Andreas Junghanns
Summary: This paper provides an overview and formalization of the Functional Mock-up Interface (FMI) 3.0, focusing on the use of clocks in event-based cyber-physical system simulation. It explains the two types of clock-based simulations supported by FMI 3.0 and how they contribute to predictable system scheduling and real-time simulations. The formalization serves as a foundation for developing tools for orchestrating, verifying, and validating multiple FMUs.
Review
Green & Sustainable Science & Technology
F. Naseri, S. Gil, C. Barbu, E. Cetkin, G. Yarimca, A. C. Jensen, P. G. Larsen, C. Gomes
Summary: Transportation electrification has seen advancements in battery technology and manufacturing, but faces challenges that can be overcome with digital twining. Digital twins utilize advanced models, AI, sensing units, IoT, and cloud computing to improve performance, safety, and cost-effectiveness of battery systems. Various studies have discussed applications and use cases for digital twins in battery management, testing, and the entire value chain. This comprehensive review examines potential use cases, enabling technologies, and requirements for battery digital twins, including electrical topics and software architectures.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Automation & Control Systems
Mirgita Frasheri, Henrik Ejersbo, Casper Thule, Claudio Gomes, Jakob Levisen Kvistgaard, Peter Gorm Larsen, Lukas Esterle
Summary: Digital twins (DTs) are a crucial technology for the development, real-time monitoring, and optimization of cyber-physical systems (CPSs). This paper presents an approach to handle situations where a DT and its physical twin (PT) get out of sync, providing user notification, degradation of DT to digital shadow (DS), and recovery mechanisms to re-establish synchronization between DT and PT.
ROBOTICS AND AUTONOMOUS SYSTEMS
(2023)
Article
Engineering, Civil
G. Abbiati, E. E. Bas, C. Gomes, P. G. Larsen
Summary: The failure mode of a structural component under fire loading is influenced by its mechanical boundary conditions, emphasizing the importance of controlling those conditions for realistic fire experiments. Hybrid fire testing, which combines actuator loading and fire exposure, has been developed to achieve this aim. Middlewares have been proposed to facilitate interoperability in hybrid testing, but the portability of hybrid models remains a challenge. This paper proposes a method using the Co-Simulation paradigm and the Functional Mock-up Interface standard to address this limitation.
FIRE SAFETY JOURNAL
(2023)
Review
Engineering, Industrial
Zahra Kazemi, Jonas Kjaer Rask, Claudio Gomes, Emre Yildiz, Peter Gorm Larsen
Summary: The concept of movable factory, defined as mobile production units near customer's location, is important for sustainability, faster response times, compliance with regulations, and dealing with fragile international supply chains. This paper conducts a systematic literature review to break down the concept, relate it to the state-of-the-art, and summarize its use cases, requirements, research gaps, and opportunities.
JOURNAL OF MANUFACTURING SYSTEMS
(2023)
Review
Engineering, Manufacturing
Till Bottjer, Daniella Tola, Fatemeh Kakavandi, Christian R. Wewer, Devarajan Ramanujan, Claudio Gomes, Peter G. Larsen, Alexandros Iosifidis
Summary: In recent years, there has been a growing hype around Digital Twins (DTs) in both industry and academia. DTs have the potential to increase automation and advance towards Smart Manufacturing. This literature review focuses on DTs at the unit level in manufacturing, specifically in terms of real-time control. The review summarizes the current implementation and operation of DTs, and highlights their potential benefits in four categories: generic reference models, services, DT content (models and data), and DT deployment (hardware and software).
CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY
(2023)
Proceedings Paper
Computer Science, Information Systems
Bentley James Oakes, Claudio Gomes, Peter Gorm Larsen, Joachim Denil, Julien Deantoni, Joao Cambeiro, John Fitzgerald
Summary: Digital Twins (DTs) are created using modeling and simulation techniques in complex domains, such as cyber-physical systems. This article focuses on the investigation of how a DT service and its qualities relate to the models used by the service. It examines the qualities of relevance, verifiability, substitutability, and fidelity, and discusses strategies for adapting models to ensure these qualities, using an incubator system as an example.
2023 ANNUAL MODELING AND SIMULATION CONFERENCE, ANNSIM
(2023)
Proceedings Paper
Computer Science, Information Systems
Simon Thrane Hansen, Claudio Gomes, Zahra Kazemi
Summary: An accurate simulation is crucial for building reliable cyber-physical systems, and standards for describing system behavior and simulations are evolving to accommodate a wider range of applications. The Functional Mockup Interface (FMI) 3.0 standard introduces synchronous clocks to enable efficient and repeatable simulation of event-driven systems. However, the standard does not specify how to synchronize models, leaving it up to the tool vendors to implement the orchestration algorithm. This paper presents the first approach to synthesizing the orchestration algorithm for FMI 3.0 supporting synchronous clocks, along with a prototype implementation.
2023 ANNUAL MODELING AND SIMULATION CONFERENCE, ANNSIM
(2023)
Proceedings Paper
Computer Science, Information Systems
Emin Oguz Inci, Wim Desmet, Claudio Gomes, Jan Croes
Summary: In serial co-simulation, the sequence of subsystem solution plays a crucial role. Previous research has shown the impact of solution sequence and proposed an adaptive scheduling algorithm based on global input estimation error. This paper introduces a mechanism considering physical causality to determine computational causality in the co-simulation. Benchmark tests against input estimation error and static solution sequences demonstrate that the resulting method generally avoids the worst solution sequence and mitigates the risk of co-simulation instability.
2023 ANNUAL MODELING AND SIMULATION CONFERENCE, ANNSIM
(2023)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Fatemeh Kakavandi, Roger De Reus, Claudio Gomes, Negar Heidari, Alexandros Iosifidis, Peter Gorm Larsen
Summary: This paper proposes a quality assessment method for an industrial use case. By preparing data and applying two data classification approaches, product quality can be evaluated efficiently, and the most efficient model can be selected to predict product labels and deviate anomalies.
2022 IEEE 20TH INTERNATIONAL CONFERENCE ON INDUSTRIAL INFORMATICS (INDIN)
(2022)
Proceedings Paper
Computer Science, Interdisciplinary Applications
Hao Feng, Claudio Gomes, Santiago Gil, Peter H. Mikkelsen, Daniella Tola, Peter Gorm Larsen, Michael Sandberg
Summary: This paper discusses the significance of Digital Twins in the manufacturing industry and explores their implementation and application by bridging them with the MAPE-K loop and Cyber-Physical Systems (CPS).
PROCEEDINGS OF THE 2022 ANNUAL MODELING AND SIMULATION CONFERENCE (ANNSIM'22)
(2022)
Proceedings Paper
Computer Science, Software Engineering
Hao Feng, Claudio Gomes, Michael Sandberg, Hugo Daniel Macedo, Peter Gorm Larsen
Summary: The complete initial state of a system is not always necessary for synchronization between a Digital Shadow and a Cyber-Physical System. Traditional stability analysis can determine the conditions under which a simulation can eventually synchronize with the CPS even without knowing the initial state.
SOFTWARE ENGINEERING AND FORMAL METHODS: SEFM 2021 COLLOCATED WORKSHOPS
(2022)
Article
Computer Science, Interdisciplinary Applications
Shivani Sharma, Sateesh Kumar Awasthi
Summary: Vehicular Ad-hoc Network (VANET) is crucial in Intelligent Transportation Systems, and this study proposes a hybrid system utilizing V2V and V2I communications for secure data dissemination in urban scenarios.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Hind Mikram, Said El Kafhali, Youssef Saadi
Summary: Efficient task scheduling in cloud data centers is crucial for optimizing resource utilization and load balance. This paper introduces a hybrid algorithm, HEPGA, that combines particle swarm optimization (PSO) and genetic algorithm (GA) to allocate tasks efficiently and minimize makespan in cloud computing environments. By integrating PSO, GA, and HEFT-based initialization, the algorithm capitalizes on parallel processing capabilities and adapts to varying priorities to enhance resource utilization. Meticulous analysis of the algorithm's performance, considering both makespan and resource utilization, demonstrates its ability to consistently allocate resources and adapt to different optimization goals.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Ping-Chen Chang, Cheng-Fu Huang, Ding-Hsiang Huang
Summary: This paper introduces a novel simulation approach based on minimal cuts to estimate the system reliability of a multistate flow network (MSFN). The approach improves computational efficiency by reducing the number of minimal cuts and preserving saturated minimal cuts. It effectively deals with non-integer demands and demonstrates effectiveness and efficiency in illustrative examples.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Jang Won Bae, Chun-Hee Lee, Jeong-Woo Lee, Seon Han Choi
Summary: In this study, a data-driven agent-based model is proposed for simulating the public bicycle-sharing systems (PBSSs) in Sejong City, South Korea. The model captures users' behavioral characteristics and analyzes their convenience through a bottom-up approach. By extracting parameters from actual operational data and demographic information, the model's accuracy is improved. Model simulations evaluate the utilization and user convenience of Eoulling, providing a viable solution for addressing multiple concerns.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Chong Shi, Junbao Pian, Cong Zhang, Xiao Chen, Yonggang Zhang
Summary: This study presents a novel numerical simulation method for analyzing the mechanisms of pulsed pressure-induced rock fractures. The results show that rock fracturing under impulsive loading is a combined effect of stress waves and high-pressure fluids, with the fluid penetration and splitting action playing important roles in the process.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Junwei Zhang, Zhongwei Chen, Kang Shao
Summary: This study investigated the performance of three constitutive models for rock material in simulation of blast-induced rock cracks, and proposed an optimal blasting parameters design.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Joshua Shakya, Chaima Ghribi, Leila Merghem-Boulahia
Summary: Modeling and simulation of telecommunication networks, especially 5G+ networks, have become increasingly important and challenging. Traditional simulation techniques may not be sufficient to capture the dynamic changes in 5G+ networks, leading researchers to adopt an Agent-based modeling and simulation approach from the perspective of Complex System Science. This study provides insights into the advantages, potential, and challenges of Agent-based simulation in the context of 5G+ networks, and proposes a prospective architecture for a simulator and its evolution into a Digital Twin.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
Article
Computer Science, Interdisciplinary Applications
Sensen Xing, Cheng Wang, Wei Wang, Rui Feng Cao, Anthony Chun Yin Yuen, Eric Wai Ming Lee, Guan Heng Yeoh, Qing Nian Chan
Summary: This paper proposes an extended FFCA model that integrates the natural step length into pedestrian movement, allowing pedestrians to occupy multiple grids and expanding the interaction area. Through simulation of evacuation scenarios, the model accurately reproduces density-velocity relations and matches experimental results. Compared to traditional models, this model generates more reasonable velocity variations and evacuation paths.
SIMULATION MODELLING PRACTICE AND THEORY
(2024)
