Now showing items 1-9 of 9

  • Bounding the output error in a buck power converter using perturbation theory 

    Angulo García, Fabiola; Fossas Colet, Enric; Seara, Tere M.; Olivar, Gerard (Hindawi, 2008-07)
    Article
    Open Access
    We show the main results obtained when applying the average theory to Zero Average Dynamic control technique in a buck power converter with pulse-width modulation (PWM). In particular, we have obtained the bound values for ...
  • Chaos in the buck converter 

    Olivar, Gerard (Universitat Politècnica de Catalunya, 1997-07-01)
    Doctoral thesis
  • Controlling Cod in an UASB Reactor 

    Muñoz, Rafael; Angulo, Fabiola; Olivar, Gerard (SARTI (Technological Development Centre of Remote Acquisition and Data processing Systems), 2007-07-16T10:47:09Z)
    Article
    Open Access
  • Feedback control of limit cycles: a switching control strategy based on nonsmooth bifurcation theory 

    Angulo García, Fabiola; Bernardo, Mario di; Fossas Colet, Enric; Olivar, Gerard (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-02)
    Article
    Open Access
    In this paper, we present a method to control limit cycles in smooth planar systems making use of the theory of nonsmooth bifurcations. By designing an appropriate switching controller, the occurrence of a corner-collision ...
  • Fonaments i estructures d'àlgebra lineal 

    Boadas Elvira, Joan; Olivar, Gerard (Edicions UPC, 1993)
    Book
    Restricted access to the UPC academic community
    Aquesta publicació s'ha d'entendre com una col·lecció d'apunts de classe, millorats i escrits en un format més clar. No es pretén que sigui una obra de referència, ja que omet alguna demostració i no fa un tractament ...
  • Nonlinear dynamics and bifurcation analysis in two models of sustainable development 

    Angulo, Fabiola; Olivar, Gerard; Osorio A., Gustavo; Velásquez, Luz S. (UPC. Cátedra Unesco de Sostenibilidad, 2009-12)
    Article
    Open Access
    We show in this document two mathematical models of development. Namely, we state two systems of nonlinear differential equations with state variables which regard to ecosystem, social and economic dimensions. We analyze ...
  • Study of Chaos in the buck Converter 

    Fossas Colet, Enric; Olivar, Gerard (Institute of Electrical and Electronics Engineers (IEEE), 1996-01)
    Article
    Open Access
    A dc-dc buck converter controlled by naturallysampled, constant-frequency pulsewidth modulation in continuous conduction mode gives rise to a great variety of behavior, depending on the values of the parameters of the ...
  • Técnica ZAD aplicada a un convertidor "buck": análisis de estabilidad y de transición al caos 

    Angulo García, Fabiola; Fossas Colet, Enric; Olivar, Gerard (Comité Español de Automática, 2005-10)
    Article
    Open Access
    En este trabajo se presentan algunos resultados obtenidos al analizar el convertidor buck controlado mediante un modulador de anchura de pulsos (PWM) centrado. El ciclo de trabajo se calcula obligando a que una salida, ...
  • Transition from periodicity to chaos in a PWM-controlled buck converter with ZAD strategy 

    Angulo García, Fabiola; Fossas Colet, Enric; Olivar, Gerard (World Scientific Publishing, 2005-10-31)
    Article
    Open Access
    The transition from periodicity to chaos in a DC-DC Buck power converter is studied in this paper. The converter is controlled through a direct Pulse Width Modulation (PWM) in order to regulate the error dynamics at zero. ...