Unified H infty control to suppress vertices of plant input and output sensitivity functions / Sang Min Suh in IEEE Transactions on control systems technology, Vol. 18 N° 4 (Juillet 2010)  

Public ISBD [article]  inIEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 969-975 Titre : Unified H infty control to suppress vertices of plant input and output sensitivity functions Type de document : texte imprimé Auteurs : Sang Min Suh, Auteur Année de publication : 2011 Article en page(s) : pp. 969-975 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Hard disk drives H infty control Kalman inequality Linear matrix inequalities (LKIs) Loop shaping Nyquist plot Stability Sensitivity peak Index. décimale : 629.1 Résumé : This note presents a discrete-time H∞ controller to attenuate effects of external disturbances introduced from both plant input and plant output. In this note, two stage control structure is constructed so that state variable dependent conventional controllers and H∞ loop shaping controllers are simultaneously utilized, which is a different approach from previous methods. For the loop shaping controller, a new weighting function derived from an open loop transfer function of fictitious state-feedback systems is proposed. Since the weighting function inherits implicit stability margins, sufficiently stable closed loop systems are designed, therefore well damped transient responses are achieved. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282508 [article] Unified H infty control to suppress vertices of plant input and output sensitivity functions [texte imprimé] / Sang Min Suh, Auteur . - 2011 . - pp. 969-975. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 4 (Juillet 2010) . - pp. 969-975 Mots-clés : Hard disk drives H infty control Kalman inequality Linear matrix inequalities (LKIs) Loop shaping Nyquist plot Stability Sensitivity peak Index. décimale : 629.1 Résumé : This note presents a discrete-time H∞ controller to attenuate effects of external disturbances introduced from both plant input and plant output. In this note, two stage control structure is constructed so that state variable dependent conventional controllers and H∞ loop shaping controllers are simultaneously utilized, which is a different approach from previous methods. For the loop shaping controller, a new weighting function derived from an open loop transfer function of fictitious state-feedback systems is proposed. Since the weighting function inherits implicit stability margins, sufficiently stable closed loop systems are designed, therefore well damped transient responses are achieved. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5282508

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