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Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems

Contemporary Critical Infrastructures (CIs), such as the power grid, comprise cyber physical systems that are tightly coupled, to form a complex system of interconnected components with interacting dependencies. Modelling methodologies have been suggested as proper tools to provide better insight in...

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Autores principales: Akbarzadeh, Aida, Katsikas, Sokratis
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957762/
https://www.ncbi.nlm.nih.gov/pubmed/33804424
http://dx.doi.org/10.3390/s21051685
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author Akbarzadeh, Aida
Katsikas, Sokratis
author_facet Akbarzadeh, Aida
Katsikas, Sokratis
author_sort Akbarzadeh, Aida
collection PubMed
description Contemporary Critical Infrastructures (CIs), such as the power grid, comprise cyber physical systems that are tightly coupled, to form a complex system of interconnected components with interacting dependencies. Modelling methodologies have been suggested as proper tools to provide better insight into the dependencies and behavioural characteristics of these complex systems. In order to facilitate the study of interconnections in and among critical infrastructures, and to provide a clear view of the interdependencies among their cyber and physical components, this paper proposes a novel method, based on a graphical model called Modified Dependency Structure Matrix (MDSM). The MDSM provides a compact perspective of both inter-dependency and intra-dependency between subsystems of one complex system or two distinct systems. Additionally, we propose four parameters that allow the quantitative assessment of the characteristics of dependencies, including multi-order dependencies in large scale CIs. We illustrate the workings of the proposed method by applying it to a micro-distribution network based on the G2ELAB 14-Bus model. The results provide valuable insight into the dependencies among the network components and substantiate the applicability of the proposed method for analyzing large scale cyber physical systems.
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spelling pubmed-79577622021-03-16 Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems Akbarzadeh, Aida Katsikas, Sokratis Sensors (Basel) Article Contemporary Critical Infrastructures (CIs), such as the power grid, comprise cyber physical systems that are tightly coupled, to form a complex system of interconnected components with interacting dependencies. Modelling methodologies have been suggested as proper tools to provide better insight into the dependencies and behavioural characteristics of these complex systems. In order to facilitate the study of interconnections in and among critical infrastructures, and to provide a clear view of the interdependencies among their cyber and physical components, this paper proposes a novel method, based on a graphical model called Modified Dependency Structure Matrix (MDSM). The MDSM provides a compact perspective of both inter-dependency and intra-dependency between subsystems of one complex system or two distinct systems. Additionally, we propose four parameters that allow the quantitative assessment of the characteristics of dependencies, including multi-order dependencies in large scale CIs. We illustrate the workings of the proposed method by applying it to a micro-distribution network based on the G2ELAB 14-Bus model. The results provide valuable insight into the dependencies among the network components and substantiate the applicability of the proposed method for analyzing large scale cyber physical systems. MDPI 2021-03-01 /pmc/articles/PMC7957762/ /pubmed/33804424 http://dx.doi.org/10.3390/s21051685 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Akbarzadeh, Aida
Katsikas, Sokratis
Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title_full Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title_fullStr Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title_full_unstemmed Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title_short Identifying and Analyzing Dependencies in and among Complex Cyber Physical Systems
title_sort identifying and analyzing dependencies in and among complex cyber physical systems
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7957762/
https://www.ncbi.nlm.nih.gov/pubmed/33804424
http://dx.doi.org/10.3390/s21051685
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