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On Iterative System Design and Separation in Control Over Noisy Channels
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
KTH, School of Electrical Engineering (EES), Communication Theory. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0002-7926-5081
KTH, School of Electrical Engineering (EES), Automatic Control. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.ORCID iD: 0000-0001-9940-5929
2008 (English)In: IFAC World Congress, Volume 17, Part 1, IFAC , 2008Conference paper, Published paper (Refereed)
Abstract [en]

We study a closed-loop control system with feedback transmitted over a noisy discrete memoryless channel. We design encoder-controller pairs that jointly optimize the sensor measurement quantization, protection against channel errors, and control. The designgoal is to minimize an expected linear quadratic cost over a finite horizon. As a result of deriving optimality criteria for this problem, we present new results on the validity of theseparation principle subject to certain assumptions. More precisely, we show that the certainty equivalence controller is optimal when the encoder is optimal and has full side-information about the symbols received at the controller. We then use this result to formulate tractable design criteria in the general case. Finally, numerical experiments are carried out to demonstrate the performance obtained by various design methods. 

Place, publisher, year, edition, pages
IFAC , 2008.
Keyword [en]
Control under communication constraints, Quantized systems, Stochastic control
National Category
Control Engineering
Identifiers
URN: urn:nbn:se:kth:diva-62894DOI: 10.3182/20080706-5-KR-1001.01738OAI: oai:DiVA.org:kth-62894DiVA: diva2:481302
Conference
17th World Congress, International Federation of Automatic Control, IFAC, Seoul, 6 July 2008 through 11 July 2008
Note
QC 20120124Available from: 2012-01-20 Created: 2012-01-20 Last updated: 2012-01-24Bibliographically approved

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Skoglund, MikaelJohansson, Karl Henrik

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