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Relating sampling period and control delay in distributed control systems
KTH, School of Electrical Engineering (EES), Electrical Machines and Power Electronics.ORCID iD: 0000-0002-0744-2552
2005 (English)In: Eurocon 2005: The International Conference on Computer as a Tool, Vol 1 and 2 , Proceedings, NEW YORK: IEEE , 2005, 274-277 p.Conference paper (Other academic)
Abstract [en]

The control delay in distributed control systems may be compensated on-line or off-line depending on the required quality of the output, available computational power of the controller node, time stamping and clock synchronizing facilities etc. Irrespective of the compensation technique, there is an upper bound to the constant or variable control delay, which is decided by the plant, controller and the selected sampling period of the distributed computer controlled system. It is shown that in general, if the control delay exceeds the sampling period, the system becomes multi-rate; deteriorate performance as the plant updates do not correspond to the output samples. This paper introduces an adaptive sampling scheme to ensure the control delay is less than the sampling period in steady state and uses the maximum tolerable delay of the system at a particular sampling interval to ensure stable transform from one sampling period to another.

Place, publisher, year, edition, pages
NEW YORK: IEEE , 2005. 274-277 p.
Keyword [en]
adaptive sampling scheme, control delay, distributed control system
National Category
Computer Science
URN: urn:nbn:se:kth:diva-36567ISI: 000237248900070ScopusID: 2-s2.0-33847779225ISBN: 1-4244-0049-XOAI: diva2:430909
International Conference on Computer as a Tool (EUROCON 2005) Belgrade, SERBIA MONTENEG, NOV 21-24, 2005
QC 20110713Available from: 2011-07-13 Created: 2011-07-13 Last updated: 2011-07-13Bibliographically approved

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ReferencesLink to record
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