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Identifier-based adaptive robust control for servomechanisms with improved transient performance / Zhang, Guozhu in IEEE transactions on industrial electronics, Vol. 57 N° 7 (Juillet 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2536 - 2547 Titre : Identifier-based adaptive robust control for servomechanisms with improved transient performance Type de document : texte imprimé Auteurs : Zhang, Guozhu, Auteur ; Chen, Jie, Auteur ; Li, Zhiping, Auteur Article en page(s) : pp. 2536 - 2547 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Adaptive  control  Identification  Robust  control  Servomechanism Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper focuses on the adaptive robust control (ARC) for servomechanisms whose dynamic models are subject to unknown parameters, disturbance, and parameter sudden changes. To improve the control performance of the traditional ARC, a novel identifier-based ARC (IFARC) scheme is proposed. In this scheme, an identifier is utilized to accelerate the parameter tuning process and to heighten the accuracy of parameter estimation. A switching logic component based on a given performance index is introduced to select the better parameter estimate vector from those provided by the identifier and the adaptation law. As a result, transient performance can be improved according to the certainty equivalence principle. In addition, the exact reconstruction of the unknown parameters and exponential decay of the tracking error can be achieved under certain conditions. The stability and performance of IFARC are theoretically analyzed. Finally, simulation results show that the IFARC can achieve favorable tracking performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313865 [article] Identifier-based adaptive robust control for servomechanisms with improved transient performance [texte imprimé] / Zhang, Guozhu, Auteur ; Chen, Jie, Auteur ; Li, Zhiping, Auteur . - pp. 2536 - 2547. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 7 (Juillet 2010) . - pp. 2536 - 2547 Mots-clés : Adaptive  control  Identification  Robust  control  Servomechanism Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper focuses on the adaptive robust control (ARC) for servomechanisms whose dynamic models are subject to unknown parameters, disturbance, and parameter sudden changes. To improve the control performance of the traditional ARC, a novel identifier-based ARC (IFARC) scheme is proposed. In this scheme, an identifier is utilized to accelerate the parameter tuning process and to heighten the accuracy of parameter estimation. A switching logic component based on a given performance index is introduced to select the better parameter estimate vector from those provided by the identifier and the adaptation law. As a result, transient performance can be improved according to the certainty equivalence principle. In addition, the exact reconstruction of the unknown parameters and exponential decay of the tracking error can be achieved under certain conditions. The stability and performance of IFARC are theoretically analyzed. Finally, simulation results show that the IFARC can achieve favorable tracking performance. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5313865