23documents trouvés
Follow the bouncing ball: global results on tracking and state estimation with impacts
F.FORNI, A.R.TEEL, L.ZACCARIAN
ULg, Santa Barbara, MAC
Rapport LAAS N°13012,
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129111Lyapunov-based hybrid loops for stability and performance of continuous-time control systems
C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
GIPSA-Lab, MAC
Revue Scientifique : Automatica, Vol.49, N°2, pp.577-584, Février 2013 , N° 12545
Lien : http://hal.archives-ouvertes.fr/hal-00781061
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Abstract
We construct hybrid loops that augment continuous-time control systems. We consider a continuous-time nonlinear plant in feedback with a (possibly non stabilizing) given nonlinear dynamic continuous-time state feedback controller. The arising hybrid closed loops are guaranteed to follow the underlying continuous-time closed-loop dynamics when flowing and to jump in suitable regions of the closed-loop state space to guarantee that a positive definite function $V$ of the closed-loop state and/or a positive definite function $V_p$ of the plant-only state is non-increasing along the hybrid trajectories. Sufficient conditions for the construction of these hybrid loops are given for the nonlinear case and then specialized for the linear case with the use of quadratic functions. For the linear case we illustrate specific choices of the functions $V$ and $V_p$ which allow for the reduction of the overshoot of a scalar output. The proposed approaches are illustrated on linear and nonlinear examples.
Global stability and finite L2m-gain of saturated uncertain systems via piecewise polynomial Lyapunov functions
A.GARULLI, A.MASI, G.VALMORBIDA, L.ZACCARIAN
DII Siene, Rome, MAC
Revue Scientifique : IEEE Transactions on Automatic Control, Vol.58, N°1, pp.242-246, Janvier 2013 , N° 12360
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128908A convex hybrid H_infty synthesis with guaranteed convergence rate
F.FICHERA, C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
MAC, GIPSA-Lab
Manifestation avec acte : IEEE Conference on Decision and Control ( CDC ) 2012 du 10 décembre au 13 décembre 2012, Maui (USA), Décembre 2012, 6p. , N° 12538
Lien : http://hal.archives-ouvertes.fr/hal-00734470
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Abstract
In this paper, a hybrid controller design for a continuous-time linear time-invariant (LTI) plant is presented. The idea is to simultaneously design the flow and jump maps with the respective sets of the controller, guaranteeing H∞ specifications and decay rate of the plant state of the hybrid closed-loop system. A convex LMI-based design procedure is proposed, generalizing the results in [22].
Antiwindup regulation of saturated linear systems
F.FORNI, L.ZACCARIAN, R.SEPULCHRE
ULg, MAC
Manifestation avec acte : IEEE Conference on Decision and Control ( CDC ) 2012 du 10 décembre au 13 décembre 2012, Maui (USA), Décembre 2012, 6p. , N° 12535
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128973Hybrid high-gain observers without peaking for planar nonlinear systems
C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
GIPSA-Lab, MAC
Manifestation avec acte : IEEE Conference on Decision and Control ( CDC ) 2012 du 10 décembre au 13 décembre 2012, Maui (USA), Décembre 2012, 6p. , N° 12537
Lien : http://hal.archives-ouvertes.fr/hal-00734471
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Abstract
In this paper we use hybrid techniques to augment high-gain observers for second order nonlinear plant with suitable reset rules where the state of the observer experiences an instantaneous jump if suitable conditions hold. These jump conditions depend on the plant output and on extra states incorporated in the observer which evolve according to some suitable combination of the output error and of its integral. We show that these hybrid rules succeed at removing peaking and illustrate our result on well known case studies taken from the literature.
Stability analysis of discrete-time piecewise-affine systems over non invariant domains
M.RUBAGOTTI, L.ZACCARIAN, A.BEMPORAD
Nazarbayev Univ, MAC, IMT Lucca
Manifestation avec acte : IEEE Conference on Decision and Control ( CDC ) 2012 du 10 décembre au 13 décembre 2012, Maui (USA), Décembre 2012, 6p. , N° 12536
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128974Robustified dynamic inversion, anti-windup loops & LFT modeling
J.M.BIANNIC, L.BURLION, C.BERARD, S.TARBOURIECH, S.GALEANI, L.ZACCARIAN
ONERA, MAC, Rome
Rapport de Contrat : Projet NICE, Décembre 2012, 200p. , N° 12687
Non diffusable
128778First experimental results with the current limit avoidance systems at the JET tokamak
G.DE TOMMASI, S.GALEANI, S.JACHMICH, E.JOFFRIN, M.LENNHOLM, P.J.LOMAS, A.C.NETO, F.MAVIGLIA, P.MC CULLEN, A.PIRONTI, F.G.RIMINI, G.VARANO, R.VITELLI, L.ZACCARIAN
Napoli, Rome, EURATOM Belgique, IRFM-CEA, Commission Européenn, EURATOM UK, EURATOM Portugal, EURATOM Italie, MAC
Manifestation sans acte : Symposium on Fusion Technology (SOFT 2012), Liège (Belgique), 24-28 Septembre 2012, 1p. (Résumé) , N° 12500
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128093A first approach to runaway electron control in FTU
D.CARNEVALE, L.BONCAGNI, C.CIANFARANI, B.ESPOSITO, G.GRANUCCI, G.MADDALUNO, D.MAROCCO, G.PUCELLA, C.SOZZI, G.VARANO, V.VITALE, L.ZACCARIAN
Rome, EURATOM Italie, MAC
Manifestation sans acte : Symposium on Fusion Technology (SOFT 2012), Liège (Belgique), 24-28 Septembre 2012, 1p. (Résumé) , N° 12501
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128095