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Closed loop identification of unstable poles and non-minimum phase zeros
KTH, School of Electrical Engineering (EES), Automatic Control. (System Identification Group)ORCID iD: 0000-0002-3672-5316
KTH, School of Electrical Engineering (EES), Automatic Control. (System Identification Group)ORCID iD: 0000-0002-9368-3079
2005 (English)In: IFAC Proceedings Volumes (IFAC-PapersOnline), Prague, 2005, Vol. 16, 518-523 p.Conference paper (Refereed)
Abstract [en]

This paper addresses estimation of poles and zeros in closed loop systems. For many quantities of interest, e.g. frequency function estimates, overparameterization results in a large increase of the variance but this is not the case for estimates of nonminimum phase zeros and unstable poles. Variance expressions that are asymptotic in model order and sample size are derived and for some systems it is found that open loop and closed loop experiments give the same accuracy.

Place, publisher, year, edition, pages
Prague, 2005. Vol. 16, 518-523 p.
, IFAC Proceedings Volumes, ISSN 1474-6670 ; 16
Keyword [en]
Analysis of variance, Closed-loop identification, Non-minimum phase systems, Closed loop identification, Closed-loop experiments, Model order, Non-minimum phase zero, Open loops, Overparameterization, Sample sizes, Automation, Closed loop systems, Control, Estimation, Poles, Closed loop control systems
National Category
Control Engineering
Research subject
URN: urn:nbn:se:kth:diva-60550ScopusID: 2-s2.0-79960728803ISBN: 978-008045108-4OAI: diva2:478690
16th Triennial World Congress of International Federation of Automatic Control, IFAC 2005; Prague; 3 July 2005 through 8 July 2005
Swedish Research Council, 621-2001-2147
QC 20120119Available from: 2012-01-16 Created: 2012-01-13 Last updated: 2012-03-02Bibliographically approved

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ReferencesLink to record
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