Internal model control of lightly damped systems subject to periodic exogenous signals / Lu, Yu-Sheng in IEEE Transactions on control systems technology, Vol. 18 N° 3 (Mai 2010)  

Public ISBD [article]  inIEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 699-704 Titre : Internal model control of lightly damped systems subject to periodic exogenous signals Type de document : texte imprimé Auteurs : Lu, Yu-Sheng, Auteur Année de publication : 2011 Article en page(s) : pp. 699-704 Note générale : Génie Aérospatial Langues : Anglais (eng) Mots-clés : Bandpass filters Control systems Internal model control Lightly damped Optical disk drives Periodic exogenous signals Index. décimale : 629.1 Résumé : This paper presents an internal model control (IMC) design for lightly-damped systems subject to periodic exogenous signals. For such systems, the conventional design of the so-called IMC filter in the IMC structure can result in oscillatory behavior even when the closed-loop transfer function is designed to be well damped. To circumvent this problem, several band-pass filters are incorporated into the IMC filter based on knowledge of the frequencies of the plant's resonance modes and exogenous signals. The track-following system of an optical disk drive is employed to illustrate the design of the proposed IMC filter. Experimental results confirm the effectiveness of the proposed design. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5169868 [article] Internal model control of lightly damped systems subject to periodic exogenous signals [texte imprimé] / Lu, Yu-Sheng, Auteur . - 2011 . - pp. 699-704. Génie Aérospatial Langues : Anglais (eng) in IEEE Transactions on control systems technology > Vol. 18 N° 3 (Mai 2010) . - pp. 699-704 Mots-clés : Bandpass filters Control systems Internal model control Lightly damped Optical disk drives Periodic exogenous signals Index. décimale : 629.1 Résumé : This paper presents an internal model control (IMC) design for lightly-damped systems subject to periodic exogenous signals. For such systems, the conventional design of the so-called IMC filter in the IMC structure can result in oscillatory behavior even when the closed-loop transfer function is designed to be well damped. To circumvent this problem, several band-pass filters are incorporated into the IMC filter based on knowledge of the frequencies of the plant's resonance modes and exogenous signals. The track-following system of an optical disk drive is employed to illustrate the design of the proposed IMC filter. Experimental results confirm the effectiveness of the proposed design. DEWEY : 629.1 ISSN : 1063-6536 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=5169868

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Sliding-mode disturbance observer with switching-gain adaptation and Its application to optical disk drives / Lu, Yu-Sheng in IEEE transactions on industrial electronics, Vol. 56 N° 9 (Septembre 2009)  

Public ISBD [article]  inIEEE transactions on industrial electronics > Vol. 56 N° 9 (Septembre 2009) . - pp. 3743-3750 Titre : Sliding-mode disturbance observer with switching-gain adaptation and Its application to optical disk drives Type de document : texte imprimé Auteurs : Lu, Yu-Sheng, Auteur Article en page(s) : pp. 3743-3750 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Sliding-mode disturbance observer Switching-gain adaptation Optical disk drives Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : This paper deals with the design of a sliding-mode disturbance observer (SDOB) with switching-gain adaptation for a class of nonlinear systems subject to exogenous signals. The proposed SDOB, referred to as IMP-SDOB, is based on the internal-model principle and thus achieves robust asymptotic disturbance estimation, whereas the conventional SDOB leads to nonzero estimation error to a time-varying disturbance. Moreover, while the conventional SDOB needs a switching gain greater than the magnitude of an unknown disturbance, the proposed IMP-SDOB design releases this constraint and requires only a small switching gain as compared with a conventional design, further alleviating the chattering problem. The stability of the combined controller-observer system is derived on the basis of a Lyapunov analysis. Moreover, in contrast with the previous switching-gain adaptation law that inevitably yields a nondecreasing switching gain and asymptotic convergence of the switching function, a novel adaptation law is proposed to reduce the switching gain whenever appropriate and to guarantee finite-time convergence of the switching function. The effectiveness of the proposed scheme is demonstrated through experimental studies on the track-following system of an optical disk drive suffering from significant disk runout. DEWEY : 621 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=5200775&arnumber=5130233 [...] [article] Sliding-mode disturbance observer with switching-gain adaptation and Its application to optical disk drives [texte imprimé] / Lu, Yu-Sheng, Auteur . - pp. 3743-3750. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 9 (Septembre 2009) . - pp. 3743-3750 Mots-clés : Sliding-mode disturbance observer Switching-gain adaptation Optical disk drives Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : This paper deals with the design of a sliding-mode disturbance observer (SDOB) with switching-gain adaptation for a class of nonlinear systems subject to exogenous signals. The proposed SDOB, referred to as IMP-SDOB, is based on the internal-model principle and thus achieves robust asymptotic disturbance estimation, whereas the conventional SDOB leads to nonzero estimation error to a time-varying disturbance. Moreover, while the conventional SDOB needs a switching gain greater than the magnitude of an unknown disturbance, the proposed IMP-SDOB design releases this constraint and requires only a small switching gain as compared with a conventional design, further alleviating the chattering problem. The stability of the combined controller-observer system is derived on the basis of a Lyapunov analysis. Moreover, in contrast with the previous switching-gain adaptation law that inevitably yields a nondecreasing switching gain and asymptotic convergence of the switching function, a novel adaptation law is proposed to reduce the switching gain whenever appropriate and to guarantee finite-time convergence of the switching function. The effectiveness of the proposed scheme is demonstrated through experimental studies on the track-following system of an optical disk drive suffering from significant disk runout. DEWEY : 621 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=5200775&arnumber=5130233 [...]

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