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Predictable cyclic computations in autonomous systems: a computational model and implementation
Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
1992 (English)Licentiate thesis, monograph (Other academic)
Abstract [en]

Cyclic computations under real-time constraints naturally occur in systems which use periodic sampling to approximate continuous signals for processing in a computer. In complex control systems, often with a high degree of autonomy, there is a need to combine this type of processing with symbolic computations for supervision and coordination.

In this thesis we present a computational model for cyclic time-driven computations subjected to run-time modifications initiated from an external system, and formulate conditions for predictable real-time behaviour. We introduce the dual state vector for representing periodically changing data. Computations are viewed as functions from the state represented by the vector at time t to the state one period later. Based on this model, we have implemented a software tool, the Process Layer Executive, which maintains dual state vectors and manages cyclic tasks that perform computations on vectors.

We present the results of a theoretical and practical evaluation of the real-time properties of the tool and give its overhead as a function of application dependent parameters that are automatically derivable from the application description in the Process Layer Configuration Language.

Place, publisher, year, edition, pages
Linköping: Univ. , 1992. , p. 81
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 352
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:liu:diva-163145Local ID: LiU-TEK-LIC-1992:44ISBN: 9178710448 (print)OAI: oai:DiVA.org:liu-163145DiVA, id: diva2:1386052
Available from: 2020-01-16 Created: 2020-01-16 Last updated: 2020-01-24Bibliographically approved

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Morin, Magnus

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Citation style
  • apa
  • ieee
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More styles
Language
  • de-DE
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  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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