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Modeling and control of a magnetostrictive tool servo system / Prinyawiwatkul, Witoon in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 130 N° 3 (Mai/Juin 2008) 

Public ISBD [article]  in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 130 N° 3 (Mai/Juin 2008) . - 11 p. Titre : Modeling and control of a magnetostrictive tool servo system Type de document : texte imprimé Auteurs : Prinyawiwatkul, Witoon, Auteur ; Paul I. Ro, Auteur Année de publication : 2010 Article en page(s) : 11 p. Note générale : dynamic systems Langues : Anglais (eng) Mots-clés : magnetostrictive  actuator;  robust  control  scheme;  Lyapunov  stability;  closed-loop  control  design Résumé : A magnetostrictive actuator offers a long mechanical strain output in a broad bandwidth at a cost of a highly nonlinear magnetic hysteresis. Full utilization of this actuator in precision manufacturing requires a feedback loop as well as an advanced control scheme. A robust control scheme using sliding mode control with a variable switching gain was tailored to the nonlinear transducer. Nominal feedforward current controller that drives the magnetostriction was based on the inverse anhysteresis model. An additional switching gain based on the Lyapunov stability condition is implemented to restrain uncertainties. Compared to a traditional closed-loop control design, the proposed algorithm experimentally showed a greatly enhanced performance. En ligne : http://dynamicsystems.asmedigitalcollection.asme.org/Mobile/article.aspx?article [...] [article] Modeling and control of a magnetostrictive tool servo system [texte imprimé] / Prinyawiwatkul, Witoon, Auteur ; Paul I. Ro, Auteur . - 2010 . - 11 p. dynamic systems Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 130 N° 3 (Mai/Juin 2008) . - 11 p. Mots-clés : magnetostrictive  actuator;  robust  control  scheme;  Lyapunov  stability;  closed-loop  control  design Résumé : A magnetostrictive actuator offers a long mechanical strain output in a broad bandwidth at a cost of a highly nonlinear magnetic hysteresis. Full utilization of this actuator in precision manufacturing requires a feedback loop as well as an advanced control scheme. A robust control scheme using sliding mode control with a variable switching gain was tailored to the nonlinear transducer. Nominal feedforward current controller that drives the magnetostriction was based on the inverse anhysteresis model. An additional switching gain based on the Lyapunov stability condition is implemented to restrain uncertainties. Compared to a traditional closed-loop control design, the proposed algorithm experimentally showed a greatly enhanced performance. En ligne : http://dynamicsystems.asmedigitalcollection.asme.org/Mobile/article.aspx?article [...]