Ara es mostren els items 1-20 de 20

    • Bounding the distance of a controllable and observable system to an uncontrollable or unobservable one 

      Clotet Juan, Josep; García Planas, María Isabel (1999)
      Article
      Accés obert
      Let $(A,B,C)$ be a triple of matrices representing a time-invariant linear system $\left .\aligned \dot x(t)&=Ax(t)+Bu(t)\\y(t)&=Cx(t)\endaligned \right \}$ under similarity equivalence, corresponding to a realization ...
    • Bounding the distance of a controllable system to an uncontrollable one 

      Clotet Juan, Josep; García Planas, María Isabel (1998)
      Article
      Accés obert
      Let $(A,B)$ be a pair of matrices representing a time-invariant linear system $\dot x(t)=Ax(t)+Bu(t)$ under block-similarity equivalence. In this paper we measure the distance between a controllable pair of matrices ...
    • Càlcul diferencial d'una i diverses variables : problemes resolts 

      Clotet Juan, Josep; Ferrer Llop, Josep; García Planas, María Isabel (Edicions UPC, 2000)
      Llibre
      Accés restringit a la comunitat UPC
      Aquest recull de problemes resolts de càlcul diferencial d'una i diverses variables és adreçat als estudiants de primer curs d'enginyeria de cicle llarg i, en particular, als de l'Escola Tècnica Superior d'Enginyers ...
    • Càlcul diferencial d'una variable : problemes resolts 

      Clotet Juan, Josep; Ferrer Llop, Josep; García Planas, María Isabel (Edicions UPC, 1994)
      Llibre
      Accés restringit a la comunitat UPC
      Aquest recull de problemes resolts de càlcul infinitesimal d'una variable va adreçat als estudiants de primer curs d'enginyeries de cicle llarg i, en particular, als de l'ETSEIB. Aquest text posa a l'abast dels estudiants ...
    • Càlcul diferencial de n variables : problemes resolts 

      Clotet Juan, Josep; Ferrer Llop, Josep; García Planas, María Isabel (Edicions UPC, 1996)
      Llibre
      Accés restringit a la comunitat UPC
      Aquest recull de problemes resolts de càlcul diferencial de n-variables és adreçat als estudiants de primer curs d'enginyeria de cicle llarg i, en particular, als de l'ETSEIB. Amb aquest objectiu, hem seleccionat els ...
    • Consideraciones en torno al problema del desacoplamiento 

      Clotet Juan, Josep; Compta Creus, Albert (2005)
      Article
      Accés obert
    • Controllability of second order linear systems 

      Clotet Juan, Josep; García Planas, María Isabel (2003)
      Article
      Accés obert
      Let (A1;A2;B) be a triple of matrices representing two-order time-invariant linear systems, ¨x = A1 ˙ x+A2x+Bu. Using linearization process we study the controllability of second order linear systems. We obtain su±cient ...
    • Controllability of second-order switched linear systems 

      Clotet Juan, Josep; García Planas, María Isabel; Magret Planas, Maria dels Dolors (2011-10)
      Report de recerca
      Accés obert
      We consider second-order switched linear systems and obtain sufficient conditions for such systems to be controllable.
    • Deformaciones miniversales de parejas de tensores de segundo orden 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors; Peña Carrera, Marta (Universidad de Sevilla, 2007-09)
      Text en actes de congrés
      Accés obert
      Consideramos en el espacio de parejas de tensores tension y deformacion la relacion de equivalencia que se corresponde con cambios de base ortonormales. Identificandolas con parejas de matrices cuadradas, podemos utilizar ...
    • Distance from a controllable switched linear system to an uncontrollable one 

      Clotet Juan, Josep; Ferrer Llop, Josep; Magret Planas, Maria dels Dolors (Servicio de publicaciones de la UPV, 2010)
      Comunicació de congrés
      Accés obert
      The set of controllable switched linear systems is an open set in the space of all switched linear systems. Then it makes sense to compute the distance from a controllable switched linear system to the set of uncontrollable ...
    • Estimating distances from quadruples satisfying stability properties to quadruples not satisfying them 

      Clotet Juan, Josep; García Planas, María Isabel; Magret Planas, Maria dels Dolors (2000)
      Article
      Accés obert
      We consider quadruples of matrices (E,A,B,C) defining generalized linear multivariable time-invariant dynamical systems, with E,A square matrices and B, C rectangular matrices. Using geometrical techniques we present ...
    • Familias diferenciables de inversas de Drazin 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2005)
      Article
      Accés obert
      Las inversas de Drazin son una clase de inversa generalizada entre cuyas aplicaciones podemos mencionar la resoluci´on de ecuaciones diferenciales, ecuaciones en diferencias, estudio de cadenas de Markov, etc. En esta ...
    • Orbits of controllable and observable systems 

      Clotet Juan, Josep; García Planas, María Isabel (1999)
      Article
      Accés obert
      Let a time-invariant linear system $\left .\aligned \dot x(t)&=Ax(t)+Bu(t)\\y(t)&=Cx(t)\endaligned \right \}$ corresponding to a realization of a prescribed transfer function matrix can be represented by triples of ...
    • Perturbation of quadrics 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors; Puerta Coll, Xavier (2000)
      Article
      Accés obert
      The aim of this paper is to study what happens when a slight perturbation affects the coefficients of a quadratic equation defining a variety (a quadric) in R^n. Structurally stable quadrics are those a small perturbation ...
    • Second order generalized linear systems. A geometric approach 

      Clotet Juan, Josep; García Planas, María Isabel (2004)
      Article
      Accés obert
      Let (E;A1;A2;B) be a quadruple of matrices representing a two-order generalized time-invariant linear system, E¨x = A1 ˙ x + A2x + Bu. We study the controllability character under an algebraic point of view.
    • Some considerations about reachability of switched linear singular systems 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2015-11-30)
      Article
      Accés obert
      No necessary and sufficient condition for reachability of switched linear singular systems has been found, exceptuating the case of the so-called “equisingular systems”. Such a condition is not valid in the general case, ...
    • Standardizable generalized systems under discrete derivative feedback 

      Clotet Juan, Josep; García Planas, María Isabel (2002)
      Article
      Accés obert
      Given a quadruple of matrices $(E,A,B,C)$ representing a generalized discrete time-invariant system $Ex(k+1)=Ax(k)+Bu(k), y(k)=Cx(k)$, we obtain necessary and sufficient conditions for which the system can be standardized ...
    • Switched singular linear systems 

      Clotet Juan, Josep; Ferrer Llop, Josep; Magret Planas, Maria dels Dolors (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06)
      Text en actes de congrés
      Accés obert
      We consider switched singular linear systems and determine the set of reachable/controllable states. We derive necessary and sufficient conditions for such a system to be reachable/controllable when an “equisingularity ...
    • Switched singular linear systems and reachability 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2011-10)
      Report de recerca
      Accés obert
      We consider switched singular linear systems and conditions for such a system to be reachable/controllable in the cases where some hypotheses hold.
    • Upper bounds for the distance between a controllable switched linear system and the set of uncontrollable ones 

      Clotet Juan, Josep; Magret Planas, Maria dels Dolors (2013-05-28)
      Article
      Accés obert
      he set of controllable switched linear systems is an open and dense set in the space of all switched linear systems. Therefore it makes sense to compute the distance from a controllable system to the nearest uncontrollable ...