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Wavelet network for semi-active control / S. Laflamme in Journal of engineering mechanics, Vol. 137 N° 7 (Juillet 2011) 

Public ISBD [article]  in Journal of engineering mechanics > Vol. 137 N° 7 (Juillet 2011) . - pp.4621-474 Titre : Wavelet network for semi-active control Type de document : texte imprimé Auteurs : S. Laflamme, Auteur ; J. J. E. Slotine, Auteur ; J. J. Connor, Auteur Année de publication : 2011 Article en page(s) : pp.4621-474 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Wavelet  Neural  networks  Structural  control  Adaptive  systems  Control  systems  Intelligent  structures  Large  structures  Vibration  mitigation Résumé : This paper proposes a wavelet neurocontroller capable of self-adaptation and self-organization for uncertain systems controlled with semiactive devices that are ideal candidates for control of large-scale civil structures. A condition on the sliding surface for cantilever-like structures is defined. The issue of applicability of the control solution to large-scale civil structures is made the central theme throughout the text, as this topic has not been extensively discussed in the literature. Stability and convergence of the proposed neurocontroller are assessed through various numerical simulations for harmonic, earthquake, and wind excitations. The simulations consist of semiactive dampers installed as a replacement for the current viscous damping system in an existing structure. The controller uses only localized measurements. Results show that the controller is stable for both active and semiactive control using limited measurements and that it is capable of outperforming passive control strategies for earthquake and wind loads. In the case of wind loads, the neurocontroller is found to also outperform a linear quadratic regulator (LQR) controller designed using full knowledge of the states and system dynamics. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i7/p462_s1?isAuthorized=no [article] Wavelet network for semi-active control [texte imprimé] / S. Laflamme, Auteur ; J. J. E. Slotine, Auteur ; J. J. Connor, Auteur . - 2011 . - pp.4621-474. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 137 N° 7 (Juillet 2011) . - pp.4621-474 Mots-clés : Wavelet  Neural  networks  Structural  control  Adaptive  systems  Control  systems  Intelligent  structures  Large  structures  Vibration  mitigation Résumé : This paper proposes a wavelet neurocontroller capable of self-adaptation and self-organization for uncertain systems controlled with semiactive devices that are ideal candidates for control of large-scale civil structures. A condition on the sliding surface for cantilever-like structures is defined. The issue of applicability of the control solution to large-scale civil structures is made the central theme throughout the text, as this topic has not been extensively discussed in the literature. Stability and convergence of the proposed neurocontroller are assessed through various numerical simulations for harmonic, earthquake, and wind excitations. The simulations consist of semiactive dampers installed as a replacement for the current viscous damping system in an existing structure. The controller uses only localized measurements. Results show that the controller is stable for both active and semiactive control using limited measurements and that it is capable of outperforming passive control strategies for earthquake and wind loads. In the case of wind loads, the neurocontroller is found to also outperform a linear quadratic regulator (LQR) controller designed using full knowledge of the states and system dynamics. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i7/p462_s1?isAuthorized=no