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Error-dependent data scheduling in resource-aware multi-loop networked control systems
KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
2017 (English)In: Automatica, ISSN 0005-1098, E-ISSN 1873-2836, Vol. 81, p. 209-216Article in journal (Refereed) Published
Abstract [en]

In this work, we address the problem of event-based data scheduling for multiple heterogeneous LTI control loops over a shared resource-constrained communication network. We introduce a novel bi-character scheduling scheme, which dynamically prioritizes the channel access at each time-step according to an error-dependent priority measure. Given local error thresholds for each control loop, the scheduling policy deterministically blocks the transmission from sub-systems with lower error values. The scheduler then allocates the limited communication resource probabilistically among the eligible sub-systems based on a prioritized measure. We prove stochastic stability of the networked control system under the proposed scheduler in terms of f-ergodicity of the overall network-induced error. Uniform analytical performance bounds are further derived for an average cost function comprised of a quadratic error term and transmission penalty. The simulation results show that our approach results in a significant reduction of the aggregate network-induced error variance compared to the conventional scheduling protocols. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2017. Vol. 81, p. 209-216
Keywords [en]
Error state, Markov chain, Networked control systems, Shared communication resource, State-dependent scheduling, Control systems, Cost functions, Errors, Markov processes, Scheduling, Stochastic systems, Analytical performance, Communication resources, Error-state, Limited communication, Scheduling policies, Scheduling protocol, State-dependent, Stochastic stability
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-216301DOI: 10.1016/j.automatica.2017.03.005ISI: 000403513900024Scopus ID: 2-s2.0-85018475663OAI: oai:DiVA.org:kth-216301DiVA, id: diva2:1163976
Note

QC 20171208

Available from: 2017-12-08 Created: 2017-12-08 Last updated: 2017-12-08Bibliographically approved

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Molin, Adam

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
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  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
  • html
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  • asciidoc
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