23documents trouvés
A software tool for the design of the current limit avoidance system at the JET tokamak
G.DE TOMMASI, G.AMBROSINO, S.GALEANI, F.MAVIGLIA, A.C.NETO, A.PIRONTI, G.VARANO, R.VITELLI, L.ZACCARIAN
Napoli, Rome, Lisboa, MAC
Revue Scientifique : IEEE Transactions on Plasma Science, Vol.40, N°8, pp.2056-2064, Août 2012 , N° 12361
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127877Model recovery anti-windup for continuous-time rate and magnitude saturated linear plants
F.FORNI, S.GALEANI, L.ZACCARIAN
ULg, Rome, MAC
Revue Scientifique : Automatica, Vol.48, N°8, pp.1502-1513, Août 2012 , N° 12252
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128106Set point regulation of an EGR valve using a FORE with hybrid input bias estimation
F.S.PANNI, D.ALBERER, L.ZACCARIAN
JKU, MAC
Manifestation avec acte : American Control Conference (ACC 2012), Montréal (Canada), 27-29 Juin 2012, pp.3192-3197 , N° 12248
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127632Nonlinear setpoint regulation of dynamically redundant actuators
T.E.PASSENBRUNNER, M.SASSANO, L.ZACCARIAN
JKU, Imperial College, MAC
Manifestation avec acte : American Control Conference (ACC 2012), Montréal (Canada), 27-29 Juin 2012, pp.973-978 , N° 12249
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127631Synthesis of polynomial static state feedback laws and analysis for discrete-time polynomial systems with saturating inputs
G.VALMORBIDA, S.TARBOURIECH, G.GARCIA, L.ZACCARIAN
Rome, MAC
Manifestation avec acte : American Control Conference (ACC 2012), Montréal (Canada), 27-29 Juin 2012, pp.2325-2330 , N° 12250
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127634Improving the performance of linear systems by adding a hybrid loop: the output feedback case
F.FICHERA, C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
MAC, GIPSA-Lab
Manifestation avec acte : American Control Conference (ACC 2012), Montréal (Canda), 27-29 Juin 2012, pp.3192-3197 , N° 11558
Lien : http://hal.archives-ouvertes.fr/hal-00734467
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Abstract
In this paper, we extend the state feedback results of Prieur et al. (NOLCOS 2010) to the linear output feedback case, when the plant state is not available and is estimated via a Luenberger observer. Two techniques, based on different reset maps and flow and jump sets and guaranteeing global practical asymptotic stability of the origin of the closed-loop system, are proposed. The effectiveness of the solutions is illustrated on a simulation example where we show suitable reduction of the output overshoot.
On finite gain Lp stability for hybrid systems
D.NESIC, A.R.TEEL, G.VALMORBIDA, L.ZACCARIAN
Univ of Melbourne, Santa Barbara, Rome, MAC
Manifestation avec acte : IFAC Conference on Analysis and Design of Hybrid Systems (ADHS'12), Eindhoven (Pays Bas), 6-8 Juin 2012, 6p. , N° 12253
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127651Global tracking and state estimation with nonsmooth impacts for a mass confined to an n-dimensional half-space
F.FORNI, A.R.TEEL, L.ZACCARIAN
ULg, Santa Barbara, MAC
Manifestation avec acte : IFAC Conference on Analysis and Design of Hybrid Systems (ADHS'12), Eindhoven (Pays Bas), 6-8 Juin 2012, 6p. , N° 12251
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127650On hybrid state-feedback loops based on a dwell-time logic
F.FICHERA, C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
MAC, GIPSA-Lab
Manifestation avec acte : IFAC Conference on Analysis and Design of Hybrid Systems (ADHS'12), Eindhoven (Pays Bas), 6-8 Juin 2012, 6p. , N° 12225
Lien : http://hal.archives-ouvertes.fr/hal-00734468
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Abstract
In this paper, we extend some results of Prieur et al. (NOLCOS 2010) by adding a dwell- time logic. The idea is to augment a pre-existing (not necessarily stabilizing) continuous-time controller by resetting its state in suitable regions when flow conditions, based on suitable Lyapunov-like functions and a dwell-time logic, are not satisfied. The additional flexibility due to the dwell time allows us to establish global exponential stability of the origin and guarantees some robustness properties. Moreover the solutions of the corresponding hybrid closed-loop systems can be made arbitrarily close to the ones in Prieur et al. (NOLCOS 2010) and therefore the optimal techniques for the maximization of the decay rate or for the overshoot reduction hold.
Improving the performance of linear systems by adding a hybrid loop
C.PRIEUR, S.TARBOURIECH, L.ZACCARIAN
GIPSA-Lab, MAC, Rome
Manifestation avec acte : World IFAC Congress (IFAC 2011), Milan (Italie) , 28 Août - 2 Septembre 2011, pp.6301-6306 , N° 11371
Lien : http://hal.archives-ouvertes.fr/hal-00573991
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Abstract
Considering a linear system, we construct hybrid loops consisting in a (possibly non stabilizing) given linear dynamic continuous-time controller with a jump rule when some conditions of the state occur. This allows us to study the performance improvement problem. More precisely, we firstly show the interest of an hybrid loop to maximize the decay rate when the gain of the controller is limited. Secondly, we show how adding a hybrid loop can be useful to reduce the overshoot of an output. The proposed approaches are illustrated on two examples.