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Iterative Encoder-Controller Design for Feedback Control Over Noisy Channels
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.
KTH, Skolan för elektro- och systemteknik (EES), Kommunikationsteori. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0002-7926-5081
KTH, Skolan för elektro- och systemteknik (EES), Reglerteknik. KTH, Skolan för elektro- och systemteknik (EES), Centra, ACCESS Linnaeus Centre.ORCID-id: 0000-0001-9940-5929
2011 (engelsk)Inngår i: IEEE Transactions on Automatic Control, ISSN 0018-9286, E-ISSN 1558-2523, Vol. 56, nr 2, s. 265-278Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

We study a closed-loop control system with state feedback transmitted over a noisy discrete memoryless channel. With the objective to minimize the expected linear quadratic cost over a finite horizon, we propose a joint design of the sensor measurement quantization, channel error protection, and controller actuation. It is argued that despite that this encoder-controller optimization problem is known to be hard in general, an iterative design procedure can be derived in which the controller is optimized for a fixed encoder, then the encoder is optimized for a fixed controller, etc. Several properties of such a scheme are discussed. For a fixed encoder, we study how to optimize the controller given that full or partial side-information is available at the encoder about the symbols received at the controller. It is shown that the certainty equivalence controller is optimal when the encoder is optimal and has full side-information. For a fixed controller, expressions for the optimal encoder are given and implications are discussed for the special cases when process, sensor, or channel noise is not present. Numerical experiments are carried out to demonstrate the performance obtained by employing the proposed iterative design procedure and to compare it with other relevant schemes.

sted, utgiver, år, opplag, sider
IEEE , 2011. Vol. 56, nr 2, s. 265-278
Emneord [en]
Discrete memoryless channel, joint encoder-controller design, joint source-channel coding, limited information control, quantized feedback control
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-31006DOI: 10.1109/TAC.2010.2051833ISI: 000287084300003Scopus ID: 2-s2.0-79951679496OAI: oai:DiVA.org:kth-31006DiVA, id: diva2:402227
Forskningsfinansiär
Swedish Research CouncilICT - The Next Generation
Merknad
QC 20110307Tilgjengelig fra: 2011-03-07 Laget: 2011-03-07 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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