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LPV observer-based strategy for rejection of periodic disturbances with time-varying frequency

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Ramos, Germán Andres
Costa Castelló, RamonMés informacióMés informacióMés informació
Cortés Romero, John Alexander
Document typeArticle
Defense date2015-01-01
Rights accessOpen Access
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
Rejection of periodic disturbances is an important issue in control theory and engineering applications. Conventional strategies like repetitive control and resonant control can deal adequately with this problem but they fail when the frequency of the disturbance varies with time. This paper proposes a Linear Parameter Varying (LPV) resonant observer-based control for periodic signal rejection which is able to deal with the changes in frequency of the disturbance signal. The observer includes, in an embedded way, an internal model of the disturbance that is based on its harmonic decomposition. In this way, the frequency of the disturbance signal constitutes a parameter that can be adjusted according to the variations of the signal. The resulting disturbance estimation is then used by a control law that cancels the periodic disturbance term while controlling a specified tracking task. The proposed scheme lets the control designer address the disturbance estimation and tracking problems separately. Experimental results, on a mechatronic test bed, show that the proposed LPV resonant observer-based control successfully rejects periodic disturbances under varying frequency conditions.
CitationRamos, G. A., Costa-Castelló, R., Cortés , J. LPV observer-based strategy for rejection of periodic disturbances with time-varying frequency. "Mathematical problems in engineering", 01 Gener 2015, vol. 2015, p. 1-9. 
URIhttp://hdl.handle.net/2117/77484
DOI10.1155/2015/380609
ISSN1024-123X
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  • ACES - Control Avançat de Sistemes d'Energia - Articles de revista [194]
  • Departament d'Enginyeria de Sistemes, Automàtica i Informàtica Industrial - Articles de revista [1.280]
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