Some users are experiencing upload errors at the moment. If you receive a "UWSpace is down for maintenance" error, please email jordan.hale@uwaterloo.ca as soon as possible. We are very sorry for the inconvenience.

Show simple item record

dc.contributor.authorVale, Julie
dc.date.accessioned2009-10-02 16:16:17 (GMT)
dc.date.available2009-10-02 16:16:17 (GMT)
dc.date.issued2009-10-02T16:16:17Z
dc.date.submitted2009
dc.identifier.urihttp://hdl.handle.net/10012/4790
dc.description.abstractIn this thesis, we consider plants with uncertain parameters where those parameters may be time-varying; we show that, with reasonable assumptions, we can design a controller that stabilizes such systems while providing near-optimal performance in the face of persistent discontinuities in the time-varying parameters. We consider two classes of uncertainty. The first class is modeled via a (possibly infinite) set of linear time invariant plants - the uncertain time variation consists of unpredictable (but sufficiently slow) switches between those plants. We consider standard LQR performance, and, in the case of a finite set of plants, the more complicated problem of LQR step tracking. Our second class is a time-varying gain margin problem: we consider an reasonably general, uncertain, time-varying function at the input of an otherwise linear time invariant nominal plant. In this second context, we consider the tracking problem wherein the signal to be tracked is modeled by a (stable) filter at the exogenous input and we measure performance via a weighted sensitivity function. The controllers are periodic and mildly nonlinear, with the exception that the controller for the second class is linear.en
dc.language.isoenen
dc.publisherUniversity of Waterlooen
dc.subjectuncertaintyen
dc.subjectperformanceen
dc.subjecttime-varyingen
dc.subjectcontrolen
dc.titleStability and Performance for Two Classes of Time-Varying Uncertain Plantsen
dc.typeDoctoral Thesisen
dc.pendingfalseen
dc.subject.programElectrical and Computer Engineeringen
uws-etd.degree.departmentElectrical and Computer Engineeringen
uws-etd.degreeDoctor of Philosophyen
uws.typeOfResourceTexten
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record


UWSpace

University of Waterloo Library
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
519 888 4883

All items in UWSpace are protected by copyright, with all rights reserved.

DSpace software

Service outages