Parameter estimation and pole-placement control of time-varying plants.

Konstantinos Tsakalis, P. A. Ioannou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


The pole placement and adaptive pole placement control problem of linear time-varying plants with smooth parameters is considered. A controller structure is proposed which guarantees the closed-loop stability and meets the control objective exactly independent of the speed of variation of the plant parameters. An adaptive estimator is designed that can use any available a priori knowledge about the structure of the plant parameter estimates. Using the certainty equivalence principle, an indirect adaptive pole placement scheme is developed for time-varying plants that guarantees the closed-loop stability, provided that only the variation of the unstructured (unknown) part of the parameters is slow, while the overall plant may be fast time-varying.

Original languageEnglish (US)
Title of host publicationProceedings of the American Control Conference
PublisherPubl by American Automatic Control Council
Number of pages6
Volume88 pt 1-3
StatePublished - 1988
Externally publishedYes

ASJC Scopus subject areas

  • Control and Systems Engineering


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