Ara es mostren els items 1-20 de 280

  • A cyclo-dissipativity framework for power factor compensation of electrical circuits 

    García Canseco, Eloísa; Griñó Cubero, Robert; Ortega, Romeo; Salichs Vivancos, Miguel; Stankovic, Alexander (2005-10)
    Text en actes de congrés
    Accés obert
    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 ...
  • A feedback-based L-2-norm limiter for periodic signals 

    Griñó Cubero, Robert; Ortega, Romeo; Fossas Colet, Enric (2011-01)
    Article
    Accés restringit per política de l'editorial
    Limiting the rms value (L2 norm) of periodic signals can be a necessity in some controllers for power electronic devices. The prevailing existing solution is simply to compute, off-line, the L2 norm and then to multiply ...
  • A Fixed-Frequency Quasi-Sliding Control Algorithm: Application to Power Inverters Design by Means of FPGA Implementation 

    Ramos Lara, Rafael Ramón; Biel Solé, Domingo; Fossas Colet, Enric; Guinjoan Gispert, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2003-01-31)
    Article
    Accés obert
    In this paper a fixed-frequency quasi-sliding control algorithm based on switching surface zero averaged dynamics (ZAD) is reported. This algorithm is applied to the design of a Buck-based inverter, and implemented in a ...
  • A new estimation of the lower error bound in balanced truncation method 

    Ha Binh, Minh; Batlle Arnau, Carles; Fossas Colet, Enric (2014-08-01)
    Article
    Accés obert
    For a single-input/single-output (SISO) linear time-invariant dynamical system, the standard H-infinity-norm lower error bound of balanced truncation method is parallel to G(s) - G(r)(s)parallel to(H infinity) >= sigma(r+1), ...
  • A new passive repetitive controller for discrete-time finite-frequency positive-real systems 

    Costa Castelló, Ramon; Wang, Danwei; Griñó Cubero, Robert (IEEE Control Systems Society, 2007)
    Text en actes de congrés
    Accés obert
    This work proposes a new repetitive controller for discrete-time finite-frequency positive-real systems which are required to track periodic references or to attenuate periodic disturbances. The main characteristic of the ...
  • A passive repetitive controller for discrete-time finite-frequency positive-real systems 

    Costa Castelló, Ramon; Wang, Danwei; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2009-04)
    Article
    Accés obert
    This work proposes and studies a new internal model for discrete-time passive or finite-frequency positive-real systems which can be used in repetitive control designs to track or to attenuate periodic signals. The main ...
  • A repetitive control scheme for distributed solar collector field 

    Berdugo de Moya, Iván Rafael; Costa Castelló, Ramon; Berenguel, M; Yebra, José Luis A. (2010-05)
    Article
    Accés restringit per política de l'editorial
    The control of the output fluid temperature in a distributed solar collector field implies accounting for the excitement of its intrinsic resonance modes. Resonance mode frequencies are related to the residence time of the ...
  • A repetitive controller for discrete-time passive systems 

    Costa Castelló, Ramon; Griñó Cubero, Robert (2006-10-23T14:07:36Z)
    Report de recerca
    Accés obert
    This work proposes and studies a new repetitive controller for discrete-time systems which are required to track or to attenuate periodic signals. The main characteristic of the proposed controller is its passivity. This ...
  • A sliding mode control for a wound rotor synchronous generator with an isolated RL load 

    Muñoz Aguilar, Raúl Santiago; Dòria Cerezo, Arnau; Fossas Colet, Enric (IEEE Press. Institute of Electrical and Electronics Engineers, 2010)
    Comunicació de congrés
    Accés obert
    In this paper a sliding mode controller for the stator voltage amplitude of a stand-alone wound rotor synchronous generator is presented. The standard dq-model of the electrical machine connected to an isolated inductive ...
  • A sliding mode controlled three wheeled narrow vehicle 

    Fossas Colet, Enric; Roqueiro, Nestor; Gaudezi de Faria, Marcelo (2013)
    Article
    Accés restringit per política de l'editorial
    This paper presents a sliding mode controller for a narrow tilting three-wheeled vehicle. The vehicle is modelled as a dynamic eighteen-order system with two inputs and two outputs, however, a simple third-order model of ...
  • A stator voltage oriented PI controller for the doubly-fed induction machine 

    Batlle Arnau, Carles; Dòria Cerezo, Arnau; Ortega, Romeo (Institute of Electrical and Electronics Engineers, 2007)
    Text en actes de congrés
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    In this paper we propose a new control scheme for the doubly–fed induction machine (DFIM) that offers significant advantages, and is considerably simpler, than the classical vector control method. In contrast with the ...
  • A survey of repetitive control in varying frequency conditions 

    Fuentes, G.A.R.; Olm Miras, Josep Maria; Costa Castelló, Ramon (2011-08)
    Article
    Accés obert
    Digital repetitive control is a strategy that allows tracking/ rejecting periodic signals. Repetitive controllers are designed assuming that the exogenous signal period is constant and known, its main drawback being the ...
  • A transient model for RF cavity analysis under beam loading 

    Hassanzadegan, Hooman; Griñó Cubero, Robert (2010-04)
    Article
    Accés restringit per política de l'editorial
    There are two important considerations in the development of an electrical model for RF cavities to be used for system analysis or LLRF loop design, being: transient response and cavity impedance mismatch. In the literature, ...
  • Adaptive Compensation Strategy For The Tracking/Rejection of Signals with Time-Varying Frequency in Digital Repetitive Control Systems 

    Ramos Fuentes, Germán Andrés; Olm Miras, Josep Maria; Costa Castelló, Ramon (2009-09)
    Text en actes de congrés
    Accés obert
    Digital repetitive control is a technique which al- lows to track periodic references and/or reject peri- odic disturbances. Repetitive controllers are usually de- signed assuming a fixed frequency for the signals to ...
  • Adaptive neural network state predictor and tracking control for nonlinear time-delay systems 

    Na, Jing; Ren, Xuemei; Gao, Yan; Griñó Cubero, Robert; Costa Castelló, Ramon (2010-02)
    Article
    Accés restringit per política de l'editorial
    A new adaptive nonlinear state predictor (ANSP) is presented for a class of unknown nonlinear systems with input time-delay. A dynamical identification with neu- ral network (NN) is constructed to obtain NN weights and ...
  • Adaptive predictive robust control for fuel cells hybrid vehicles 

    Degliuomini, Lucas Nieto; Zumoffen, David; Basualdo, Marta; Feroldi, Diego Hernán; Riera, Jordi (Riera Colomer) (2010)
    Text en actes de congrés
    Accés obert
    The transient behavior of a Polymer Electrolyte Membrane Fuel Cell System (PEMFCS) under an efficient Adaptive Predictive Control with Robust Filter (APCWRF) is analyzed. This control scheme is tested to evaluate its ...
  • Admittance-shaped Hinf current controller for grid-connected VSC 

    Perez Morales, Jorge; Cóbreces Álvarez, Santiago; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper introduces an H8 current controller that allows the shaping of power converters’ input admittance in frequency domain, allowing to define not only its magnitude but also its phase. In addition to admittance ...
  • Advances in HOSM Control Design and Implementation for PEM Fuel Cell Systems 

    Kunusch, Cristian; Puleston, Paul; Mayosky, Miguel Angel; Serra, Maria (2009)
    Text en actes de congrés
    Accés obert
    A second order sliding mode strategy to control the air supply and oxygen stoichiometry of a fuel cell based generation system is presented. The control design is accomplished from a complete model of a experimental plant ...
  • An algebraic parameter estimation approach to the adaptive observer-controller based regulation of the boost converter 

    Sira-Ramírez, Hebertt; Fossas Colet, Enric; Spinetti Rivera, Mario (Institute of Electrical and Electronics Engineers, 2007-06)
    Text en actes de congrés
    Accés obert
    In this article, a new approach is proposed for the problem of output voltage reference trajectory tracking in a boost converter with unknown, piecewise constant, load resistance values, under the restriction of noisy ...
  • An educational approach to the internal model principle for periodic signals 

    Costa Castelló, Ramon; Olm Miras, Josep Maria; Vargas, Hector; Ramos Fuentes, Germán Andrés (2012-08)
    Article
    Accés obert
    This article presents an educational approach to resonant control and repet- itive control, which are Internal Model Principle-based control techniques speci cally de- signed for the tracking/rejection of periodic signals. ...