Exploració per autor "Ortega, Romeo"
Ara es mostren els items 21-35 de 35
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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 obertThis 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 obertThe 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 obertThis 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 obertThis 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'editorialThis 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)
Text en actes de congrés
Accés restringit per política de l'editorialThis 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
Accés obertThe 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 obertWe 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 obertWe 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 obertThis 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
Accés obertIn 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 obertPassivity-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'editorialIn 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)
Text en actes de congrés
Accés restringit per política de l'editorialEfficient 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
Accés restringit per política de l'editorialThis 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 ...