Backstepping control for nonlinear systems with time delays and applications to chemical reactor systems / Changchun, Hua 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. 3723-3732 Titre : Backstepping control for nonlinear systems with time delays and applications to chemical reactor systems Type de document : texte imprimé Auteurs : Changchun, Hua, Auteur ; Liu, Peter X., Auteur ; Xinping, Guan, Auteur Article en page(s) : pp. 3723-3732 Note générale : Génie électrique Langues : Anglais (eng) Mots-clés : Backstepping control Nonlinear systems Time delays Chemical reactor Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : The state feedback control problem is addressed for a class of nonlinear time-delay systems. The time delays appear in all state variables of the nonlinear system, which brings a challenging issue for controller design. With an introduced new Lyapunov-Krasovskii functional, we develop a novel control strategy. With the help of a backstepping method, we design a memoryless state feedback controller, which does not need the precise knowledge of time delays. It is rigorously proved that the closed-loop system is asymptotically stable. Chemical reactor plants are typical nonlinear systems with time delays. We apply the developed method to the control design of a two-stage chemical reactor with delayed recycle streams, and the simulation results verify the effectiveness of the main results. DEWEY : 621 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=5200775&arnumber=5130068 [...] [article] Backstepping control for nonlinear systems with time delays and applications to chemical reactor systems [texte imprimé] / Changchun, Hua, Auteur ; Liu, Peter X., Auteur ; Xinping, Guan, Auteur . - pp. 3723-3732. Génie électrique Langues : Anglais (eng) in IEEE transactions on industrial electronics > Vol. 56 N° 9 (Septembre 2009) . - pp. 3723-3732 Mots-clés : Backstepping control Nonlinear systems Time delays Chemical reactor Index. décimale : 621 Ingénierie mécanique en général. Technologie nucléaire. Ingénierie électrique. Machinerie Résumé : The state feedback control problem is addressed for a class of nonlinear time-delay systems. The time delays appear in all state variables of the nonlinear system, which brings a challenging issue for controller design. With an introduced new Lyapunov-Krasovskii functional, we develop a novel control strategy. With the help of a backstepping method, we design a memoryless state feedback controller, which does not need the precise knowledge of time delays. It is rigorously proved that the closed-loop system is asymptotically stable. Chemical reactor plants are typical nonlinear systems with time delays. We apply the developed method to the control design of a two-stage chemical reactor with delayed recycle streams, and the simulation results verify the effectiveness of the main results. DEWEY : 621 ISSN : 0278-0046 En ligne : http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?isnumber=5200775&arnumber=5130068 [...]

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Position-error based schemes for bilateral teleoperation with time delay: / Ilia G. Polushin in Transactions of the ASME . Journal of dynamic systems, measurement, and control, Vol. 132 N° 3 (Mai 2010)  

Public ISBD [article]  inTransactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 132 N° 3 (Mai 2010) . - 11 p. Titre : Position-error based schemes for bilateral teleoperation with time delay: Type de document : texte imprimé Auteurs : Ilia G. Polushin, Auteur ; Liu, Peter X., Auteur ; Chung-Horng Lung, Auteur Année de publication : 2010 Article en page(s) : 11 p. Note générale : Systèmes dynamiques Langues : Anglais (eng) Mots-clés : Delays Differential equations Feedback Stability Telerobotics Time-varying systems Index. décimale : 629.8 Résumé : The problem of stable bilateral teleoperation with position-error based force feedback in the presence of time-varying possibly unbounded communication delay is addressed. Two stabilization schemes are proposed that guarantee “independent of delay” stability of the teleoperator system. In particular, one of the schemes theoretically allows to achieve an arbitrary high force-reflection gain, which leads to better transparency without sacrificing the stability of the overall system. The stability analysis is based on the input-to-output stable small gain theorem for systems of functional-differential equations. Experimental results are presented, which demonstrate stable behavior of the telerobotic system with time-varying communication delay during contact with a rigid obstacle. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA00013200 [...] [article] Position-error based schemes for bilateral teleoperation with time delay: [texte imprimé] / Ilia G. Polushin, Auteur ; Liu, Peter X., Auteur ; Chung-Horng Lung, Auteur . - 2010 . - 11 p. Systèmes dynamiques Langues : Anglais (eng) in Transactions of the ASME . Journal of dynamic systems, measurement, and control > Vol. 132 N° 3 (Mai 2010) . - 11 p. Mots-clés : Delays Differential equations Feedback Stability Telerobotics Time-varying systems Index. décimale : 629.8 Résumé : The problem of stable bilateral teleoperation with position-error based force feedback in the presence of time-varying possibly unbounded communication delay is addressed. Two stabilization schemes are proposed that guarantee “independent of delay” stability of the teleoperator system. In particular, one of the schemes theoretically allows to achieve an arbitrary high force-reflection gain, which leads to better transparency without sacrificing the stability of the overall system. The stability analysis is based on the input-to-output stable small gain theorem for systems of functional-differential equations. Experimental results are presented, which demonstrate stable behavior of the telerobotic system with time-varying communication delay during contact with a rigid obstacle. DEWEY : 629.8 ISSN : 0022-0434 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JDSMAA00013200 [...]

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