Ara es mostren els items 19-35 de 35

    • Networking improves robustness in flexible-joint multi-robot systems with only joint position measurements 

      Nuño, Emmanuel; Ortega, Romeo; Jayawardhana, Bayu; Basañez Villaluenga, Luis (2013-12)
      Article
      Accés restringit per política de l'editorial
      This paper studies the robustness in the coordination - via energy-shaping - of multiple nonidentical flexible-joint robots with only joint position measurements. The control objective is to drive all manipulators link ...
    • Nouveau routeur dynamique prenant en compte les pertes : Théorie et résultats expérimentaux 

      Ramírez, Victor; Ortega, Romeo; Sánchez-Squella, Antonio; Bethoux, Olivier; Griñó Cubero, Robert (2012)
      Text en actes de congrés
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      Dans de nombreux r eseaux, la r egulation e cace du transfert d' energie entre les sous-syst emes de production, de stockage et d'utilisation demeure un sujet di cile a traiter. Les auteurs proposent ici une nouvelle ...
    • On existence and stability of equilibria of dc LTI circuits with constant power loads 

      Barabanov, Nikita; Ortega, Romeo; Griñó Cubero, Robert; Polyak, Boris (2016)
      Text en actes de congrés
      Accés obert
      This paper studies the problem of existence and stability of equilibria of dc linear time–invariant circuits with constant power loads. First, we correct an unfortunate mistake in our previous work [10] pertaining to the ...
    • On existence and stability of equilibria of linear time-invariant systems With constant power loads 

      Barabanov, Nikita; Ortega, Romeo; Griñó Cubero, Robert; Polyak, Boris (2016-01-01)
      Article
      Accés obert
      The problem of existence and stability of equilibria of linear systems with constant power loads is addressed in this paper. First, we correct an unfortunate mistake in our recent paper [10] pertaining to the sufficiency ...
    • On Existence of equilibria of multi-port linear AC networks with constant-power loads 

      Machado, Juan E.; Griñó Cubero, Robert; Barabanov, Nikita; Ortega, Romeo; Polyak, Boris (2017-10-01)
      Article
      Accés obert
      This paper explores the problem of stability of linear time-invariant (LTI), multi-port AC circuits with instantaneous constant-power loads (CPLs), which model the behavior of some point-of-load converters. It is well-known ...
    • Passive bilateral teleoperation framework for assisted robotic tasks 

      Nuño Ortega, Emmanuel; Basañez Villaluenga, Luis; Ortega, Romeo (Institute of Electrical and Electronics Engineers, 2006-04)
      Text en actes de congrés
      Accés obert
      This paper addresses the problem of stable bilateral teleoperation, through a time-delayed communication channel, for a n-DOF system without position drift. The classical wave variables-based scheme encodes velocity and ...
    • Passivity-based control for bilateral teleoperation: A tutorial 

      Nuño Ortega, Emmanuel; Basañez Villaluenga, Luis; Ortega, Romeo (2011-03)
      Article
      Accés restringit per política de l'editorial
      This tutorial revisits several of the most recent passivity-based controllers for nonlinear bilateral teleoperators with guaranteed stability properties. These schemes, which include scattering–based, damping injection ...
    • Position tracking using adaptive control for bilateral teleoperators with time-delays 

      Nuño Ortega, Emmanuel; Basañez Villaluenga, Luis; Ortega, Romeo; Obregón-Pulido, Guillermo (2010)
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      This paper presents two versions of adaptive controllers for nonlinear bilateral teleoperators, each providing asymptotic convergence of velocity and position errors to zero, independent of constant time-delays. Moreover, ...
    • Power factor compension of electrical circuits: a control theory wiewpoint 

      García Canseco, Eloísa; Griñó Cubero, Robert; Ortega, Romeo; Salichs Vivancos, Miguel; Stankovic, Alexander (2005-10)
      Text en actes de congrés
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      The purpose of this paper is to bring the attention of the control community some of the aspects of the practically important, and mathematically challenging, power factor compensation problem. Our main contribution is ...
    • Power Flow Control of a Doubly-Fed Induction Machine Coupled to a Flywheel 

      Batlle Arnau, Carles; Dòria Cerezo, Arnau; Ortega, Romeo (Lavoisier, 2005-08)
      Article
      Accés obert
      We consider a doubly–fed induction machine controlled through the rotor voltage and connected to a variable local load—that acts as an energy–switching device between a local prime mover (a flywheel) and the electrical ...
    • Power flow control of a doubly-fed induction machine coupled to a flywheel 

      Batlle Arnau, Carles; Dòria Cerezo, Arnau; Ortega, Romeo (2004-05)
      Report de recerca
      Accés obert
      We consider a doubly-fed induction machine –controlled through the rotor voltage and connected to a variable local load- that acts as an energy-switching device between a local prime mover (a flywheel) and the electrical ...
    • Power-factor compensation of electrical circuits. A framework for analysis and design in the nonlinear nonsinusoidal case. 

      García Canseco, Eloísa; Griñó Cubero, Robert; Ortega, Romeo; Salichs Vivancos, Miguel; Stankovic, Alexander (Institute of Electrical and Electronics Engineers, Inc., 2007-04-30)
      Article
      Accés obert
      This article advances an analysis and compensator design framework for power-factor compensation based on cyclodissipativity. Although the framework applies to general polyphase unbalanced circuits, this paper have focused ...
    • Power–factor compensation is equivalent to cyclodissipassivation 

      García Canseco, Eloísa; Ortega, Romeo; Griñó Cubero, Robert; Stankovic, Alexander (Institute of Electrical and Electronics Engineers, 2007-07)
      Text en actes de congrés
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      In a previous work we have identified the key role played by the concept of cyclodissipativity in the solution of the power–factor–compensation problem for electrical circuits with general nonlinear loads and operating in ...
    • Simultaneous Interconnection and Damping Assignment Passivity-Based Control: Two Practical Examples 

      Batlle Arnau, Carles; Dòria Cerezo, Arnau; Espinosa Pérez, Gerardo; Ortega, Romeo (Springer Verlag, 2007-10)
      Capítol de llibre
      Accés obert
      Passivity-based control (PBC) is a generic name given to a family of controller design techniques that achieves system stabilization via the route of passivation, that is, rendering the closed-loop system passive with a ...
    • Study of the stability of a direct stator current controller for a doubly fed induction machine using the complex hurwitz test 

      Dòria Cerezo, Arnau; Bodson, Marc; Batlle Arnau, Carles; Ortega, Romeo (2013-11)
      Article
      Accés restringit per política de l'editorial
      In this brief, a new control scheme is presented for the doubly fed induction machine (DFIM). The proposed control algorithm offers the advantages of proven stability and remarkable simplicity. In contrast to the classical ...
    • Theory and experimental results of two dynamic energy routers 

      Ramirez, Victor; Ortega, Romeo; Griñó Cubero, Robert; Sánchez-Squella, Antonio; Bethoux, Olivier (IEEE Press. Institute of Electrical and Electronics Engineers, 2012)
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      Efficient regulation of the energy transfer between generating, storage and load subsystems is a topic of current practical interest. A new strategy to achieve this objective, together with its corresponding power ...
    • Trajectory tracking and consensus of networks of Euler–Lagrange systems 

      Nuño Ortega, Emmanuel; Ortega, Romeo; Basañez Villaluenga, Luis; Hill, David (Curran, 2011)
      Text en actes de congrés
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      This paper addresses the problem of synchronizing networks of nonidentical, nonlinear dynamical systems described by Euler–Lagrange equations. It is assumed that the communication graph is simply connected and that the ...