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- Sanfridson, Martin, et al.
(author)
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A quality of control architecture and codesign method
- 2004
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In: Proc 10th Real time and embedded technology and applications symposium.
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Conference paper (peer-reviewed)abstract
- An architecture and a method supportingcodesign of flexible computer control systems are proposedin this paper. We call this approach Quality of Controlto reflect the emphasis on control performance. Keycomponents of the architecture include negotiation to optimizeoverall quality, admission control, explicit specificationsof control characteristics and timing constraints,and on-line estimation of the control performance as afunction of the actual system timing. The purpose is togive flexibility in terms of scalability, maintainability,configurability and graceful degradation.
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- Sanfridson, Martin, et al.
(author)
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The effect of randomly time varying sampling and computational delay
- 2005
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In: 16th Triennial World Congress of International Federation of Automatic Control, IFAC 2005.
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Conference paper (peer-reviewed)abstract
- A randomly time-varying sampling period or control delay affects the performance, robustness and stability of a control loop. The variation in sensing and actuation instants is caused by e.g. multitasking, interactions in distributed systems and varying processing time. The discretization of a continuous-time quadratic loss function and the process is here extended to the case of aperiodic systems, when the control signal exhibits multiple changes during a non-uniform sampling period.
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- Törngren, Martin, 1963-, et al.
(author)
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Strategies and considerations in shaping cyber-physical systems education
- 2016
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In: ACM SIGBED Review. - : Association for Computing Machinery (ACM). - 1551-3688. ; :1, s. 53-60
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Journal article (peer-reviewed)abstract
- Embedded and Cyber-Physical Systems education faces several challenges as well as opportunities as every-“thing” becomes connected, and as technology development accelerates. Initiatives such as CDIO, as well as several other academic and industry initiatives to create new CPS programs illustrate strong interests and awareness of these challenges. We provide an overview of foreseen educational needs, existing state of the art in education and an analysis of the subject of CPS with the purpose of understanding the implications for education. The investigation points to key issues in curriculum design regarding balancing depth and breadth, theory and practices, academic and industrial needs, and core technical skills with complementary skills. Curricula in CPS could, if the right balance is achieved, educate CPS engineers of the future that are “ready to engineer”. We conclude by synthesizing high level guidelines in terms of strategies and considerations for CPS curriculum development.
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- Alelyani, T., et al.
(author)
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A literature review on obsolescence management in COTS-centric cyber physical systems
- 2019
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In: Procedia Computer Science. - : Elsevier B.V.. - 1877-0509. ; , s. 135-145
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Conference paper (peer-reviewed)abstract
- Commercial off-the-shelf (COTS)-centric cyber physical systems often contain software and hardware elements with life-spans shorter than the systems' intended life-span. Various studies have examined hardware obsolescence, although in most systems, software costs contribute as much, or more, to the total life cycle costs than hardware. The aim of our research effort is to explore, synthesize, and compile past research efforts on obsolescence in the context of COTS-based systems, and propose new ways to overcome related issues. This research effort suggests the need for systematic perspectives to streamline potentially overbearing acquisition processes while focusing on core critical aspects affecting systems sustainment and cost. Significant life cycle costs associated with obsolescence mitigation approaches, therefore, programmatic strategic planning should be adapted to include the context of obsolescence with the objective to improve the efficiency of new COTS-intensive CPS systems with enduring perspectives. The study reveals opportunities and challenges for obsolescence in COTS-based CPSs.
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- Andruetto, Claudia, et al.
(author)
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Adding Cyberphysical Systems to the Engineering Education "Pi"
- 2023
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In: Computer. - : Institute of Electrical and Electronics Engineers (IEEE). - 0018-9162 .- 1558-0814. ; 56:2, s. 116-120
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Journal article (peer-reviewed)abstract
- Because many systems are evolving into cyberphysical systems, it is essential to examine their impact on society. This article introduces a multidisciplinary course that provides an overview of how these systems contribute to sociotechnical change.
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- Behere, Sagar, 1981-, et al.
(author)
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A Functional Reference Architecture for Autonomous Driving
- 2016
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In: Information and Software Technology. - : Elsevier. - 0950-5849 .- 1873-6025. ; 73, s. 136-150
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Journal article (peer-reviewed)abstract
- ContextAs autonomous driving technology matures towards series production, it is necessary to take a deeper look at various aspects of electrical/electronic (E/E) architectures for autonomous driving.ObjectiveThis paper describes a functional architecture for autonomous driving, along with various considerations that influence such an architecture. The functionality is described at the logical level, without dependence on specific implementation technologies.MethodEngineering design has been used as the research method, which focuses on creating solutions intended for practical application. The architecture has been refined and applied over a five year period to the construction of protoype autonomous vehicles in three different categories, with both academic and industrial stakeholders.ResultsThe architectural components are divided into categories pertaining to (i) perception, (ii) decision and control, and (iii) vehicle platform manipulation. The architecture itself is divided into two layers comprising the vehicle platform and a cognitive driving intelligence. The distribution of components among the architectural layers considers two extremes: one where the vehicle platform is as "dumb" as possible, and the other, where the vehicle platform can be treated as an autonomous system with limited intelligence. We recommend a clean split between the driving intelligence and the vehicle platform. The architecture description includes identification of stakeholder concerns, which are grouped under the business and engineering categories. A comparison with similar architectures is also made, wherein we claim that the presence of explicit components for world modeling, semantic understanding, and vehicle platform abstraction seem unique to our architecture.ConclusionThe concluding discussion examines the influences of implementation technologies on functional architectures and how an architecture is affected when a human driver is replaced by a computer. The discussion also proposes that reduction and acceleration of testing, verification, and validation processes is the key to incorporating continuous deployment processes.
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