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A hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods / Lan, Weiyao in IEEE transactions on industrial electronics, Vol. 57 N° 5 (Mai 2010) 

Public ISBD [article]  in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1735 - 1745 Titre : A hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods Type de document : texte imprimé Auteurs : Lan, Weiyao, Auteur ; Thum, Chin Kwan, Auteur ; Chen, Ben M., Auteur Année de publication : 2011 Article en page(s) : pp. 1735 - 1745 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Hard  disk  drive  (HDD)  Nonlinear  feedback  Servo  system  Tracking  control  Transient  performance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper investigates the design of composite nonlinear-feedback (CNF) control law for a hard-disk-drive (HDD) servo system. First, a scaled nonlinear function is introduced for the CNF control law, in which a parameter is scaled by the error between the amplitude of the target reference and the initial value of the system controlled output. The closed-loop system under the scaled function has robust transient performance to the variation of the amplitude of the target reference. Then, the parameters of the selected nonlinear function are tuned by optimal tuning methods. More specifically, the parameter-tuning problem is formulated as an optimization problem, which can be solved efficiently via numerical methods. The simulation and experimental results show that the control law designed using the new approach yields excellent performance for both track seeking and track following in the HDD servo system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5256288 [article] A hard-disk-drive servo system design using composite nonlinear-feedback control with optimal nonlinear gain tuning methods [texte imprimé] / Lan, Weiyao, Auteur ; Thum, Chin Kwan, Auteur ; Chen, Ben M., Auteur . - 2011 . - pp. 1735 - 1745. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 57 N° 5 (Mai 2010) . - pp. 1735 - 1745 Mots-clés : Hard  disk  drive  (HDD)  Nonlinear  feedback  Servo  system  Tracking  control  Transient  performance Index. décimale : 621.38 Dispositifs électroniques. Tubes à électrons. Photocellules. Accélérateurs de particules. Tubes à rayons X Résumé : This paper investigates the design of composite nonlinear-feedback (CNF) control law for a hard-disk-drive (HDD) servo system. First, a scaled nonlinear function is introduced for the CNF control law, in which a parameter is scaled by the error between the amplitude of the target reference and the initial value of the system controlled output. The closed-loop system under the scaled function has robust transient performance to the variation of the amplitude of the target reference. Then, the parameters of the selected nonlinear function are tuned by optimal tuning methods. More specifically, the parameter-tuning problem is formulated as an optimization problem, which can be solved efficiently via numerical methods. The simulation and experimental results show that the control law designed using the new approach yields excellent performance for both track seeking and track following in the HDD servo system. DEWEY : 621.38 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5256288