Fast and robust synchronization of twin-gyro systems / S. M. Shahruz in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 131 N°1 (Janvier/Février 2009)  

Public ISBD [article]  inTransactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 131 N°1 (Janvier/Février 2009) . - 05 p. Titre : Fast and robust synchronization of twin-gyro systems Type de document : texte imprimé Auteurs : S. M. Shahruz, Auteur Année de publication : 2009 Article en page(s) : 05 p. Note générale : dynamic systems Langues : Anglais (eng) Mots-clés : motion  trusses (building)  design  displacement  robustness  synchronization Résumé : In this paper, design of control laws for V-gimbaled control-moment-gyro (CMG) devices is studied. Such a device has two gyros that are used to control the slewing motion of space truss arms. Control laws are designed to make the gyros of a CMG device track a desired function of time synchronously. Synchronous tracking makes the angular displacement of a truss arm track a desired function of time. Application of the synchronizing control laws to two-gyro systems in the absence and presence of parametric uncertainties and disturbances is studied. In both cases, the designed control laws achieve the desired goals. DEWEY : 629.8 ISSN : 0022-0434 En ligne : dynamicsystems.asmedigitalcollection.asme.org/issue.aspx?journalid=117&issueid=2 [...] [article] Fast and robust synchronization of twin-gyro systems [texte imprimé] / S. M. Shahruz, Auteur . - 2009 . - 05 p. dynamic systems Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 131 N°1 (Janvier/Février 2009) . - 05 p. Mots-clés : motion  trusses (building)  design  displacement  robustness  synchronization Résumé : In this paper, design of control laws for V-gimbaled control-moment-gyro (CMG) devices is studied. Such a device has two gyros that are used to control the slewing motion of space truss arms. Control laws are designed to make the gyros of a CMG device track a desired function of time synchronously. Synchronous tracking makes the angular displacement of a truss arm track a desired function of time. Application of the synchronizing control laws to two-gyro systems in the absence and presence of parametric uncertainties and disturbances is studied. In both cases, the designed control laws achieve the desired goals. DEWEY : 629.8 ISSN : 0022-0434 En ligne : dynamicsystems.asmedigitalcollection.asme.org/issue.aspx?journalid=117&issueid=2 [...]

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A robustness issue of control laws designed by the input-shaping methodology / S. M. Shahruz in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 130 N°5 (Septembre 2008)  

Public ISBD [article]  inTransactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 130 N°5 (Septembre 2008) . - 4 p. Titre : A robustness issue of control laws designed by the input-shaping methodology Type de document : texte imprimé Auteurs : S. M. Shahruz, Auteur Année de publication : 2008 Article en page(s) : 4 p. Note générale : dynamic systems Langues : Anglais (eng) Mots-clés : stability  feedback  robustness  mechanisms Résumé : In this note, a robustness issue of control laws designed by the input-shaping methodology is brought to the fore. A control law designed by this methodology consists of a sequence of step inputs that are applied at designated time instants by a switching mechanism. It is shown that the stability of systems controlled by such control laws may not be robust in the presence of errors in the switching time instants. En ligne : http://dynamicsystems.asmedigitalcollection.asme.org/issue.aspx?journalid=117&is [...] [article] A robustness issue of control laws designed by the input-shaping methodology [texte imprimé] / S. M. Shahruz, Auteur . - 2008 . - 4 p. dynamic systems Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 130 N°5 (Septembre 2008) . - 4 p. Mots-clés : stability  feedback  robustness  mechanisms Résumé : In this note, a robustness issue of control laws designed by the input-shaping methodology is brought to the fore. A control law designed by this methodology consists of a sequence of step inputs that are applied at designated time instants by a switching mechanism. It is shown that the stability of systems controlled by such control laws may not be robust in the presence of errors in the switching time instants. En ligne : http://dynamicsystems.asmedigitalcollection.asme.org/issue.aspx?journalid=117&is [...]

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