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Publications (10 of 176) Show all publications
Jinzhi, L., Wang, J., Chen, D., Wang, J. & Törngren, M. (2018). A Service-Oriented Tool-Chain for Model-Based Systems Engineering of Aero-Engines. IEEE Access, 6, 50443-50458
Open this publication in new window or tab >>A Service-Oriented Tool-Chain for Model-Based Systems Engineering of Aero-Engines
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2018 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 6, p. 50443-50458Article in journal (Refereed) Published
Abstract [en]

This paper proposes a service-oriented tool-chain with an emphasis on domain-specific views, simulation automation, and process management to support model-based system engineering of aero-engines. In the tool-chain, a domain-specific modeling approach is adopted to facilitate the descriptions of co-design workflows and the related development information. The relevant domain-specific models are the basis for automated creation of a Web-based process management system consolidating and controlling service-oriented technical resources (models, data, and tools). In particular, the system also provides support for automated orchestration of tool operations, model, and simulation configurations. In order to promote the model and tool interoperability, the tool-chain adopts open standards for integrations, including open services for lifecycle collaboration and functional mock-up interface. Finally, through a case study of simulation-based aero-engine performance analysis, we evaluate the flexibility and efficiency of this tool chain by comparing it with a traditional simulation process both qualitatively and quantitatively.

Place, publisher, year, edition, pages
IEEE, 2018
Keywords
Aero-engine design, MBSE, tool-integration, simulation automation, process management, service-oriented approach
National Category
Embedded Systems
Identifiers
urn:nbn:se:kth:diva-237177 (URN)10.1109/ACCESS.2018.2868055 (DOI)000446492400001 ()2-s2.0-85052835296 (Scopus ID)
Note

QC 20181024

Available from: 2018-10-24 Created: 2018-10-24 Last updated: 2018-10-24Bibliographically approved
Törngren, M., Zhang, X., Mohan, N., Becker, M., Svensson, L., Tao, X., . . . Westman, J. (2018). Architecting Safety Supervisors for High Levels of Automated Driving. In: Proceeding of the 21st IEEE Int. Conf. on Intelligent Transportation Systems: . Paper presented at the 21st IEEE Internal Conference on Intelligent Transportation Systems. IEEE
Open this publication in new window or tab >>Architecting Safety Supervisors for High Levels of Automated Driving
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2018 (English)In: Proceeding of the 21st IEEE Int. Conf. on Intelligent Transportation Systems, IEEE, 2018Conference paper, Published paper (Refereed)
Abstract [en]

The complexity of automated driving poses challenges for providing safety assurance. Focusing on the architecting of an Autonomous Driving Intelligence (ADI), i.e. the computational intelligence, sensors and communication needed for high levels of automated driving, we investigate so called safety supervisors that complement the nominal functionality. We present a problem formulation and a functional architecture of a fault-tolerant ADI that encompasses a nominal and a safety supervisor channel. We then discuss the sources of hazardous events, the division of responsibilities among the channels, and when the supervisor should take over. We conclude with identified directions for further work.

Place, publisher, year, edition, pages
IEEE, 2018
National Category
Embedded Systems
Identifiers
urn:nbn:se:kth:diva-235189 (URN)
Conference
the 21st IEEE Internal Conference on Intelligent Transportation Systems
Note

QC 20180920

Available from: 2018-09-17 Created: 2018-09-17 Last updated: 2018-11-02Bibliographically approved
Törngren, M. & Sellgren, U. (2018). Complexity challenges in development of cyber-physical systems. In: Marten Lohstroh, Patricia Derler, Marjan Sirjani (Ed.), Principles of modeling: Essays dedicated to Edward A. Lee on the occasion of his 60th birthday (pp. 478-503). Switzerland: Springer
Open this publication in new window or tab >>Complexity challenges in development of cyber-physical systems
2018 (English)In: Principles of modeling: Essays dedicated to Edward A. Lee on the occasion of his 60th birthday / [ed] Marten Lohstroh, Patricia Derler, Marjan Sirjani, Switzerland: Springer, 2018, p. 478-503Chapter in book (Refereed)
Abstract [en]

In embarking towards Cyber-Physical Systems (CPS) withunprecedented capabilities it becomes essential to improve our understanding ofCPS complexity and how we can deal with it. We investigate facets of CPScomplexity and the limitations of Collaborating Information Processing Systems(CIPS) in dealing with those facets. By CIPS we refer to teams of humans andcomputer-aided engineering systems that are used to develop CPS. Furthermore,we specifically analyze characteristic differences among software and physicalparts within CPS. The analysis indicates that it will no longer be possible to relyonly on architectures and skilled people, or process and model/tool centeredapproaches. The tight integration of heterogeneous physical, cyber, CPS components,aspects and systems, results in a situation with interfaces and interrelationseverywhere, each requiring explicit consideration. The role of modelbasedand computer aided engineering will become even more essential, anddesign methodologies will need to deeply consider interwoven systems andsoftware aspects, including the hidden costs of software.

Place, publisher, year, edition, pages
Switzerland: Springer, 2018
Keywords
cyber-physical systems, complex systems, complexity, complexity management, systems engineering, software engineering
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-236313 (URN)978-3-319-95245-1 (ISBN)978-3-319-95246-8 (ISBN)
Note

QC 20181019

Available from: 2018-10-17 Created: 2018-10-17 Last updated: 2018-10-19Bibliographically approved
Törngren, M. & Sellgren, U. (2018). Complexity Challenges in Development of Cyber-Physical Systems. In: Principles of Modeling Essays Dedicated to Edward A. Lee on the Occasion of His 60th Birthday: (pp. 478-503). Springer
Open this publication in new window or tab >>Complexity Challenges in Development of Cyber-Physical Systems
2018 (English)In: Principles of Modeling Essays Dedicated to Edward A. Lee on the Occasion of His 60th Birthday, Springer, 2018, p. 478-503Chapter in book (Refereed)
Abstract [en]

In embarking towards Cyber-Physical Systems (CPS) with unprecedented capabilities it becomes essential to improve our understanding of CPS complexity and how we can deal with it. We investigate facets of CPS complexity and the limitations of Collaborating Information Processing Systems (CIPS) in dealing with those facets. By CIPS we refer to teams of humans and computer-aided engineering systems that are used to develop CPS. Furthermore, we specifically analyze characteristic differences among software and physical parts within CPS. The analysis indicates that it will no longer be possible to rely only on architectures and skilled people, or process and model/tool centered approaches. The tight integration of heterogeneous physical, cyber, CPS components, aspects and systems, results in a situation with interfaces and interrelations everywhere, each requiring explicit consideration. The role of model-based and computer aided engineering will become even more essential, and design methodologies will need to deeply consider interwoven systems and software aspects, including the hidden costs of software.

Place, publisher, year, edition, pages
Springer, 2018
Series
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics), ISSN 0302-9743 ; 10760
Keywords
Complex systems, Complexity, Complexity management, Cyber-Physical Systems, Software engineering, Systems engineering
National Category
Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-238383 (URN)10.1007/978-3-319-95246-8_27 (DOI)2-s2.0-85052709637 (Scopus ID)978-3-319-95245-1 (ISBN)
Note

QC 20181108

Available from: 2018-11-08 Created: 2018-11-08 Last updated: 2018-11-08Bibliographically approved
Vahdati, P. M., Feng, L. & Törngren, M. (2018). Design Optimization of Cyber-Physical Systems by Partitioning and Coordination: A Study on Mechatronic Systems. In: Proceedings - 21st Euromicro Conference on Digital System Design, DSD 2018: . Paper presented at 21st Euromicro Conference on Digital System Design, DSD 2018, Prague, Czech Republic, 29 August 2018 through 31 August 2018 (pp. 304-311311). IEEE, Article ID 8491832.
Open this publication in new window or tab >>Design Optimization of Cyber-Physical Systems by Partitioning and Coordination: A Study on Mechatronic Systems
2018 (English)In: Proceedings - 21st Euromicro Conference on Digital System Design, DSD 2018, IEEE, 2018, p. 304-311311, article id 8491832Conference paper, Published paper (Refereed)
Abstract [en]

Cyber-Physical Systems are inherently complex. Reducing the design complexity of such systems, is beneficial for scalability of the design. In this paper, a method for design optimization of these systems is proposed to facilitate the decomposition of the optimization problem for the whole system into smaller sub-problems and coordination of modular solutions to reach the desired optimum. The coordinated solutions are either identical to the optimal solution of the complex optimization problem for the system as a whole or within an acceptable error margin of it. To demonstrate the efficacy of the method, it is applied to a mechatronic case study. The results provide evidence for the potential feasibility of the methodology in terms of meeting the requirements on the solutions, while reducing the computational demand of the design process.

Place, publisher, year, edition, pages
IEEE, 2018
Keywords
cyber-physical systems, mechatronic systems, design optimization, design structure matrix
National Category
Other Mechanical Engineering
Research subject
Machine Design
Identifiers
urn:nbn:se:kth:diva-240617 (URN)10.1109/DSD.2018.00061 (DOI)2-s2.0-85056487947 (Scopus ID)
Conference
21st Euromicro Conference on Digital System Design, DSD 2018, Prague, Czech Republic, 29 August 2018 through 31 August 2018
Projects
oCPSXPRES
Funder
EU, Horizon 2020, 674875XPRES - Initiative for excellence in production research, 674875
Note

QC 20190117

Available from: 2018-12-20 Created: 2018-12-20 Last updated: 2019-01-17Bibliographically approved
Lu, J., Gürdür, D., Chen, D., Wang, J. & Törngren, M. (2018). Empirical-evolution of frameworks supporting co-simulation tool-chain development. In: 6th World Conference on Information Systems and Technologies, WorldCIST 2018: . Paper presented at 6th World Conference on Information Systems and Technologies, WorldCIST 2018, 27 March 2018 through 29 March 2018 (pp. 813-828). Springer Verlag
Open this publication in new window or tab >>Empirical-evolution of frameworks supporting co-simulation tool-chain development
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2018 (English)In: 6th World Conference on Information Systems and Technologies, WorldCIST 2018, Springer Verlag , 2018, p. 813-828Conference paper, Published paper (Refereed)
Abstract [en]

Co-simulation has been proposed as a method for facilitating integrated simulation of multi-domain models of Cyber-physical Systems (CPS). To ensure that co-simulations are well-managed, concerns beyond technical mechanisms for co-simulation also need to be addressed during tool-chain development. In this paper, an evolution of two frameworks supporting co-simulation tool-chain development is first introduced. Drawing upon the empirical findings from an initial framework SPIT developed based on model-driven techniques, we develop a service-oriented framework, SPIRIT based on model-driven and tool-integration techniques. Moreover, we propose a 3D viewpoint based method to formalize concept models of co-simulation tool-chains. In order to evaluate the evolution, we use visualizations of related concept models to compare tool-chains developed based on these two frameworks. 

Place, publisher, year, edition, pages
Springer Verlag, 2018
Keywords
Co-simulation, Framework design, Model-driven, Process management, Tool-integration, Embedded systems, Information systems, Information use, Co-simulations, Framework designs, Tool integration, Chains
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-227478 (URN)10.1007/978-3-319-77703-0_80 (DOI)2-s2.0-85045152504 (Scopus ID)9783319777023 (ISBN)
Conference
6th World Conference on Information Systems and Technologies, WorldCIST 2018, 27 March 2018 through 29 March 2018
Note

Conference code: 212469; Export Date: 9 May 2018; Conference Paper; Correspondence Address: Törngren, M.; KTH Royal Institute of Technology, Brinellvgen 83, Sweden; email: martint@kth.se. QC 20180516

Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2018-05-16Bibliographically approved
Jinzhi, L., Yuejie, W., Gürdür, D., Qi, L. & Törngren, M. (2018). MBSE Applicability Analysis in Chinese Industry. In: : . Paper presented at 28th Annual INCOSE International Symposium.
Open this publication in new window or tab >>MBSE Applicability Analysis in Chinese Industry
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2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Model-based systems engineering (MBSE) is an emerging technique widely used in current industry. It is a leading way expected to become a next-generation standard practice in the systems engineering. Fundamental tenets of systems engineering can be supported by a model-based approach to minimize design risks and avoid design changes in late development stages. The models can be used to formalize, analyze, design, optimize, verify and validate target products which help developers to integrate engineering development, organization and product across domains. Though model-based development is well established in specific domains, such as software, mechanical system, electric systems, its role in integrated development from system aspect is still a big challenge for current Chinese industry. In this paper, a survey from volunteers who related with MBSE is taken by questionnaires. The purpose of this survey is to highlight the usage and status of MBSE in current Chinese industry and address roughly the understandings of MBSE concepts among system developers in China based on the answers about usages, advantages, barriers, concerns, trends of MBSE, particularly the perspective of tool-chain development.

Keywords
MBSE Applicability Analysis, Chinese industry, MBSE tool-chain, tool-integration
National Category
Engineering and Technology
Research subject
Production Engineering; Aerospace Engineering
Identifiers
urn:nbn:se:kth:diva-225131 (URN)
Conference
28th Annual INCOSE International Symposium
Note

QC 20180531

Available from: 2018-03-30 Created: 2018-03-30 Last updated: 2018-05-31Bibliographically approved
Jinzhi, L., Chen, D., Jian, W. & Törngren, M. (2018). Towards A Service-oriented Framework for MBSE Tool-chain Development. In: 2018 13th System of Systems Engineering Conference, SoSE 2018: . Paper presented at 13th System of Systems Engineering Conference, SoSE 2018, Sorbonne Universite Campus Pierre et Marie Curie, Paris, France, 19 June 2018 through 22 June 2018 (pp. 568-575). Institute of Electrical and Electronics Engineers (IEEE), Article ID 8428746.
Open this publication in new window or tab >>Towards A Service-oriented Framework for MBSE Tool-chain Development
2018 (English)In: 2018 13th System of Systems Engineering Conference, SoSE 2018, Institute of Electrical and Electronics Engineers (IEEE), 2018, p. 568-575, article id 8428746Conference paper, Published paper (Refereed)
Abstract [en]

This paper proposes a SPIRIT framework supporting model-based systems engineering (MBSE) tool-chain development of advanced cyber-physical systems (CPS) with emphasis on tool integration, process management, automated verification and validation. The core features of the developed MBSE tool-chain include domain-specific modeling to describe CPS development, service-oriented deployment of technical resources (data, model and tool operations) and process management through IT platforms. The framework has two purposes: to support tool-chain development with a systems engineering approach; to promote interoperability of the whole developed tool-chain through a service-oriented approach. The framework covers social, process, information and technical aspects aiming to integrate various related MBSE techniques with tool-chain development. Based on the framework, an MBSE tool-chain prototype is developed, and the flexibility and interoperability are evaluated through a case study.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2018
Keywords
MBSE, Tool-chain development, Process management, Tool integration, Service orchestration
National Category
Engineering and Technology
Identifiers
urn:nbn:se:kth:diva-226673 (URN)10.1109/SYSOSE.2018.8428746 (DOI)2-s2.0-85052314372 (Scopus ID)9781538648766 (ISBN)
Conference
13th System of Systems Engineering Conference, SoSE 2018, Sorbonne Universite Campus Pierre et Marie Curie, Paris, France, 19 June 2018 through 22 June 2018
Note

QC 20180504

Available from: 2018-04-24 Created: 2018-04-24 Last updated: 2018-09-06Bibliographically approved
Masson, L., Guiochet, J., Waeselynck, H., Cabrera, K., Cassel, S. & Törngren, M. (2018). Tuning permissiveness of active safety monitors for autonomous systems. In: 10th International Symposium on NASA Formal Methods, NFM 2018: . Paper presented at 17 April 2018 through 19 April 2018 (pp. 333-348). Springer Verlag
Open this publication in new window or tab >>Tuning permissiveness of active safety monitors for autonomous systems
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2018 (English)In: 10th International Symposium on NASA Formal Methods, NFM 2018, Springer Verlag , 2018, p. 333-348Conference paper, Published paper (Refereed)
Abstract [en]

Robots and autonomous systems have become a part of our everyday life, therefore guaranteeing their safety is crucial. Among the possible ways to do so, monitoring is widely used, but few methods exist to systematically generate safety rules to implement such monitors. Particularly, building safety monitors that do not constrain excessively the system’s ability to perform its tasks is necessary as those systems operate with few human interventions. We propose in this paper a method to take into account the system’s desired tasks in the specification of strategies for monitors and apply it to a case study. We show that we allow more strategies to be found and we facilitate the reasoning about the trade-off between safety and availability. 

Place, publisher, year, edition, pages
Springer Verlag, 2018
Keywords
Economic and social effects, NASA, Active safety, Autonomous systems, Building safety, Human intervention, Safety rules, Trade off, Formal methods
National Category
Mechanical Engineering
Identifiers
urn:nbn:se:kth:diva-227492 (URN)10.1007/978-3-319-77935-5_23 (DOI)2-s2.0-85045300021 (Scopus ID)9783319779348 (ISBN)
Conference
17 April 2018 through 19 April 2018
Note

Conference code: 212739; Export Date: 9 May 2018; Conference Paper; Correspondence Address: Masson, L.; LAAS-CNRS, CNRSFrance; email: lola.masson@laas.fr. QC 20180516

Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2018-05-16Bibliographically approved
Gürdür, D. & Törngren, M. (2018). Visual Analytics for Cyber-physical Systems Development: Blending Design Thinking and Systems Thinking. In: : . Paper presented at 15th Annual NordDesign Conference (NordDesign 2018).
Open this publication in new window or tab >>Visual Analytics for Cyber-physical Systems Development: Blending Design Thinking and Systems Thinking
2018 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Cyber-physical systems (CPS) are integrations of computational and physical processes. They represent a new generation of systems that interact with humans and expand the capabilities of the physical world through computation, communication, and control. At the same time, actions and interventions associated with this complex systems can have highly unpredictable and unintended consequences. Furthermore, today’s practices of CPS design and implementation are not able to support the level of complexity required to detect these consequences. 

One methodology to approach this complex problem space is systems thinking (ST). Systems thinking emerges as both a worldview and a process in the sense that it informs one's understanding regarding a system and can be used as a problem-solving approach. Systems thinking is an abstraction-oriented analysis approach, specifically designed for heterogeneous complex systems.

At the same time, another methodology, design thinking (DT), has enjoyed significantly increased visibility and importance over the last decade. Design thinking is a creative problem-solving approach, which puts human to the center and focuses first on the needs and experiences of the user.

This paper aims to illustrate the possibility to use design thinking and systems thinking methodologies together to better deal with the complexity related problems during CPS design and implementation. The study proposes visual analytics as an integrative tool between these two methodologies, by (1) analyzing and understanding CPS development process through systems thinking, and (2) innovating and transforming the process through design thinking. To this end, an example use case is described and the application of the blended methodology explained step by step in relation to the use case. Visual analytics and data visualization are discussed in several steps and the possible benefits highlighted.

Keywords
design thinking, systems thinking, data analytics, cyber-physical systems
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering Computer and Information Sciences
Identifiers
urn:nbn:se:kth:diva-232358 (URN)
Conference
15th Annual NordDesign Conference (NordDesign 2018)
Note

QC 20180822

Available from: 2018-07-20 Created: 2018-07-20 Last updated: 2019-01-11Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-4300-885X

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