Estimation of Model Uncertainties in Closed-loop Systems

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This paper describe a method for estimation of parameters or uncertainties in closed-loop systems. The method is based on an application of the dual YJBK (after Youla, Jabr, Bongiorno and Kucera) parameterization of all systems stabilized by a given controller. The dual YJBK transfer function is a measure for the variation in the system seen through the feedback controller. It is shown that it is possible to isolate a certain number of parameters or uncertain blocks in the system exactly. This is obtained by modifying the feedback controller through the YJBK transfer function together with pre- and post-filters. The estimation is then derived using standard methods.
Original languageEnglish
Title of host publicationEstimation of Model Uncertainities in Closed-loop Systems
Place of PublicationWashington
PublisherAmerican Control Conference
Publication date2008
ISBN (Print)978-1-4244-2078-0
Publication statusPublished - 2008
EventEstimation of Model Uncertainties in Closed-loop Systems -
Duration: 1 Jan 2008 → …


ConferenceEstimation of Model Uncertainties in Closed-loop Systems
Period01/01/2008 → …

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