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An improved self-triggered implementation for linear controllers
KTH, School of Electrical Engineering (EES), Automatic Control. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre. (Automatic Control)
Department of Electrical Engineering, University of California Los Angeles, USA.
INCAS 3 & University of Groningen, The Netherlands.
Department of Electrical Engineering, University of California Los Angeles, USA.
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2012 (English)Conference paper, Poster (Refereed)
Abstract [en]

Research in networked control systems raised the importance of understanding what are thetiming requirements for control. In recent years this problem has been attacked from multiple anglesincluding the computation of Maximal Allowable Transmission Intervals, event-triggered, and selftriggered controller implementations. In a self-triggered implementation the controller is responsible forcomputing the next time instant at which the actuator values should be updated by evaluating the controllaw on fresh sensor measurements. One of the main challenges in self-triggered control is how to performthe exact calculation of the time at which these updates should take place. In this paper we present anew technique to compute lower bounds on the self-triggered update times in a computationally lightmanner. We evaluate the algorithm on numerical examples and we observe that the algorithm performswell when compared to other existing methods and provides tight lower bounds on the exact updatetimes. Additionally, we propose a Semidefinite Programming-based technique that produces triggeringconditions that are less conservative than the existing ones and for which the update times are larger.

Place, publisher, year, edition, pages
National Category
Control Engineering
URN: urn:nbn:se:kth:diva-103594ScopusID: 2-s2.0-84880988757OAI: diva2:560810
3rd IFAC Workshop on Distributed Estimation and Control in Networked Systems (NecSys), September 14-15, 2012, Fess Parker’s Doubletree Resort, Santa Barbara, California
Knut and Alice Wallenberg FoundationSwedish Research CouncilVinnova

QC 20121108

Available from: 2012-11-08 Created: 2012-10-15 Last updated: 2012-11-08Bibliographically approved

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Araujo, JoseJohansson, Karl H.
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