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Article: Estimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost

TitleEstimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost
Authors
Issue Date2017
PublisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6221036
Citation
IEEE Transactions on Cybernetics, 2017, v. 47 n. 12, p. 4074-4085 How to Cite?
AbstractIn this paper, we study the state estimation and optimal control [i.e., linear quadratic Gaussian (LQG) control] problems for networked control systems in which control inputs, observations, and packet acknowledgments (ACKs) are randomly lost. The packet ACK is a signal that is transmitted from the actuator to notice the estimator the occurence of control packet loss. For such systems, we obtain the optimal estimator, which is consisted of exponentially increasing terms. For the solvability of the LQG problem, we come to a conclusion that in general even the optimal LQG control exists, it is impossible and unnecessary to be obtained as its calculation is not only technically difficult but also computationally prohibitive. This issue motivates us to design a suboptimal LQG controller for the underlying systems. We first develop a suboptimal estimator by using the estimator gain in each term of the optimal estimator. Then we derive a suboptimal LQG controller and establish the conditions for stability of the closed-loop systems. Examples are given to illustrate the effectiveness and advantages of the proposed design scheme.
Persistent Identifierhttp://hdl.handle.net/10722/243148
ISSN
2017 Impact Factor: 8.803
2015 SCImago Journal Rankings: 2.886
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLin, H-
dc.contributor.authorSu, H-
dc.contributor.authorShi, P-
dc.contributor.authorLu, R-
dc.contributor.authorWu, ZG-
dc.date.accessioned2017-08-25T02:50:42Z-
dc.date.available2017-08-25T02:50:42Z-
dc.date.issued2017-
dc.identifier.citationIEEE Transactions on Cybernetics, 2017, v. 47 n. 12, p. 4074-4085-
dc.identifier.issn2168-2267-
dc.identifier.urihttp://hdl.handle.net/10722/243148-
dc.description.abstractIn this paper, we study the state estimation and optimal control [i.e., linear quadratic Gaussian (LQG) control] problems for networked control systems in which control inputs, observations, and packet acknowledgments (ACKs) are randomly lost. The packet ACK is a signal that is transmitted from the actuator to notice the estimator the occurence of control packet loss. For such systems, we obtain the optimal estimator, which is consisted of exponentially increasing terms. For the solvability of the LQG problem, we come to a conclusion that in general even the optimal LQG control exists, it is impossible and unnecessary to be obtained as its calculation is not only technically difficult but also computationally prohibitive. This issue motivates us to design a suboptimal LQG controller for the underlying systems. We first develop a suboptimal estimator by using the estimator gain in each term of the optimal estimator. Then we derive a suboptimal LQG controller and establish the conditions for stability of the closed-loop systems. Examples are given to illustrate the effectiveness and advantages of the proposed design scheme.-
dc.languageeng-
dc.publisherInstitute of Electrical and Electronics Engineers. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6221036-
dc.relation.ispartofIEEE Transactions on Cybernetics-
dc.rights©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.-
dc.titleEstimation and LQG Control Over Unreliable Network With Acknowledgment Randomly Lost-
dc.typeArticle-
dc.identifier.emailLin, H: lhzju@hku.hk-
dc.description.naturepostprint-
dc.identifier.doi10.1109/TCYB.2016.2597259-
dc.identifier.hkuros274496-
dc.identifier.volume47-
dc.identifier.issue12-
dc.identifier.spage4074-
dc.identifier.epage4085-
dc.identifier.isiWOS:000415727200006-
dc.publisher.placeUnited States-

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