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Adaptive rejection of periodic disturbances with unknown period
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Signals and Systems.
1996 (English)In: Journal of Dynamic Systems Measurement, and Control, ISSN 0022-0434, E-ISSN 1528-9028, Vol. 118, no 3, p. 606-610Article in journal (Refereed) Published
Abstract [en]

A disturbance cancellation extension by means of Youla parametrization to a stabilizing nominal controller is investigated. In the case of known disturbance model, disturbance frequencies or period time, it may be implemented directly as an add-on device to the existing control system. The nominal control system may be designed without consideration of the deterministic disturbances. This way it may suffice with a PID controller. It may also be a more complex one e.g., designed to obtain certain robustness properties. For known relation between the disturbance frequencies (one or more periodic signals) but unknown fundamental frequency, a frequency shaped disturbance model estimarion scheme is utilized. This makes it possible to e.g., adapt the disturbance model to minimize the error directly with respect to the output. For periodic disturbances the scheme implements a self-tuning discrete time repetitive controller. To illustrate the feasibility of the approach taken it is used for rejecting a periodic disturbance acting on a nonminimum-phase plant.

Place, publisher, year, edition, pages
1996. Vol. 118, no 3, p. 606-610
National Category
Control Engineering
Research subject
Control Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-3510DOI: 10.1115/1.2801187Scopus ID: 2-s2.0-13544254840Local ID: 15684410-bf82-11db-834c-000ea68e967bOAI: oai:DiVA.org:ltu-3510DiVA, id: diva2:976368
Note

Godkänd; 1996; 20070218 (ysko)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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