Browsing by Author "Puerta Sales, Ferran"

1. Inauguració
Puerta Sales, Ferran; Subirachs Torné, Miquel (20110222)
Audiovisual
Open Access 
A cellular decomposition of the manifold of observable conditioned invariant subspaces
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2000)
Article
Open AccessGiven an observable system defined by a pair of matrices $(C,A)$ we obtain a cellular decomposition of the manifold of $(C,A)$conditioned invariant subspaces having the restricted system fixed observability indices and ... 
A coordinate atlas of the manifold of observable conditioned invariant subspaces
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (1999)
Article
Open AccessGiven an observable system (C,A)€ K^(mxn)X K^(nxn)with K=R or C, the set of (C,A)invariant subspaces having the restricted system fixed observability indices is a smooth manifold embedded on the corresponding ... 
A geometrical aprroach to C<sup>p</sup>globalization of pointwise matricial relations
Puerta Sales, Ferran; Puerta Coll, Xavier (1999)
External research report
Open Access 
A sufficient condition for Lipschitz stability of controlled Invariant subspaces
Peña Carrera, Marta; Puerta Sales, Ferran; Puerta Coll, Xavier (200912)
Article
Restricted access  publisher's policyGiven a pair of matrices (A,B) we study the Lipschitz stability of its controlled invariant subspaces. A sufficient condition is derived from the geometry of the set formed by the quadruples (A,B, F, S) where S is ... 
Brunovsky local form of a holomorphic family of pair of matrices
Ferrer Llop, Josep; García Planas, María Isabel; Puerta Sales, Ferran (Elsevier, 1997)
Article
Restricted access  publisher's policyFollowing Arnold’s techniques, we obtain a local canonical form of a holomorphic family of pairs of matrices ( A( A), B(h)) ac t e d on by the state feedback group. We obtain an explicit formula to compute the dimension ... 
Global blocksimilarity and pole assignment of class C<sup>p</sup>
Ferrer Llop, Josep; Puerta Sales, Ferran (1998)
Article
Open AccessStarting from the existence of a $C^{p}$basis for any $C^{p}$family of subspaces having constant dimension, we construct a Brunovsky basis of class $C^{p}$ for a $C^{p}$family of pairs of matrices having constant ... 
Global reduction to the Kronecker canonical form of a C^rfamily of timeinvariant linear systems
Ferrer Llop, Josep; Puerta Sales, Ferran; Puerta Coll, Xavier (1999)
Article
Open AccessWe present a geometric approach to the study of timeinvariant systems, represented by quadruples of matrices (A, B, C, D). Our main goal is, given a differentiable family of such quadruples having constant Kronecker type, ... 
Miniversal deformations of marked matrices
Compta Creus, Albert; Ferrer Llop, Josep; Puerta Sales, Ferran (2001)
Article
Open AccessGiven the set of square matricesM⊂Mn+m(C) that keep the subspace W = Cnx{0} ⊂ Cn+m invariant, we obtain the implicit form of a miniversal deformation of a matrix a∈M, and we compute it explicitely when this matrix is ... 
On the geometry of the generalized partial realization problem
Baragaña, Itziar; Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (201009)
Article
Restricted access  publisher's policyThe geometry of the set of generalized partial realizations of a finite nice sequence of matrices is studied. It is proved that this set is a stratified manifold, the dimension of their strata is computed and its connection ... 
On the geometry of the solutions of the cover problem
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2003)
Article
Open AccessFor a given system (A;B) and a subspace S, the Cover Problem consits of ¯nding all (A;B)invariant subspaces containing S. For controllable systems, the set of these subspaces can be suitably strati¯ed. In this paper, ... 
On the parametrization of the controllability pairs of a controllable subspaces of a controllable pair
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2004)
Article
Open AccessGiven a controllable linear control system defined by a pair of constant matrices (A,B), the set of controllability subspaces is a stratified submanifold of the set of (A,B)invariant subspaces. We parametrize each strata ... 
On the parametrization of the controllability subspaces of a controllable pair
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2003)
Article
Open AccessGiven a controllable linear control system defined by a pair of constant matrices (A;B), the set of controllability subspaces is an stratified submanifold of the set of (A;B)invariant subspaces. We parameterize each ... 
On the perturbation of bimodal systems
Puerta Coll, Xavier; Puerta Sales, Ferran (Servicio de publicaciones de la UPV, 2010)
Conference lecture
Open AccessGiven a bimodal system de¯ned by the equations ½ x_ (t) = A1x(t) + Bu(t) if ctx(t) · 0 x_ (t) = A2x(t) + Bu(t) if ctx(t) ¸ 0 (1) where B 2Mn;m and Ai 2Mn, i = 1; 2, are such that A1;A2 coincide on the hyper plane V ... 
On the stratifications of the set of $(A,B)$invariant and controllability subspaces
Puerta Sales, Ferran; Puerta Coll, Xavier (2001)
Article
Open Access 
Output Maximal Dimension for the Disturbance Decoupling Problem
Puerta Sales, Ferran; Puerta Coll, Xavier; Zaballa, Ion (2001)
Article
Open AccessGiven a linear time invariant system with a disturbance we describe a method of finding the maximal dimensional output for a generic Disturbance Decoupling problem. 
Regularity of the BrunovskyKronecker stratification
Ferrer Llop, Josep; García Planas, María Isabel; Puerta Sales, Ferran (1998)
Article
Open AccessWe study the partition of the set of pairs of matrices according to the Brunovsky Kronecker type. We show that it is a constructible stratification, and that it is Whitney regular when the second matrix is a column matrix. ... 
Sistemes lineals: una aproximació a algun dels seus conceptes i problemes rellevants
Puerta Sales, Ferran (20140110)
Other
Open AccessL'objectiu que m'he proposat al preparar aquesta exposició ha estat el de mostrar. per una banda, com alguns dels problemes bàsics de la teoria de Sistemes Dinàmics Lineals tenen una resposta senzilla en termes de l' ... 
Stability of (A,B)invariant subspaces
Peña Carrera, Marta; Puerta Coll, Xavier; Puerta Sales, Ferran (2005)
Article
Open AccessGiven a pair of matrices (A;B) we study the stability of their invariant subspaces from the geometry of the manifold of quadruples (A;B; S; F) where S is an (A;B)invariant subspace and F is such that (A + BF)S ½ S. In ... 
Stability of <math>(A, B)</math>invariant subspaces
Puerta Sales, Ferran; Puerta Coll, Xavier (2003)
External research report
Open AccessGiven a pair of matrices (A,B) we study the stability of their invariant subspaces from a geometric point of view. The main tool is the manifold of quadruples((A;B); F; S) where S is an (A,B)invariant subspace and F is ...