2026-04-13T01:08:58Zhttps://recercat.cat/oai/request

oai:recercat.cat:2117/11952025-07-17T08:12:48Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc García Planas, María Isabel author Mailybaev, Alexei A. author 2002 Matrix pencils under the strict equivalence and matrix pairs under the state feedback equivalence are considered. It is known that a matrix pencil (or a matrix pair) smoothly dependent on parameters can be reduced locally to a special typically more simple form, called the versal deformation, by a smooth change of parameters and a strict equivalence (or feedback equivalence)transformation. We suggest an explicit recurrent procedure for finding the change of parameters and equivalence transformation in the reduction of a given family of matrix pencils (or matrix pairs) to the versal deformation. As an application, this procedure is applied to the analysis of the uncontrollability set in the space of parameters for a one-input linear dynamical system. Explicit formulae for a tangent plane to the uncontrollability set at its regular point and the perturbation of the uncontrollable mode are derived. A physical example is given and studied in detail. Algebras, Linear Multilinear algebra Matrices Global analysis (Mathematics) System theory versal deformation matrix pencil matrix pair feedback equivalence controllability Àlgebra lineal Àlgebra multilineal Matriu S, Teoria Sistemes, Teoria de Classificació AMS::58 Global analysis, analysis on manifolds::58K Theory of singularities and catastrophe theory Classificació AMS::93 Systems Theory; Control::93B Controllability, observability, and system structure Classificació AMS::15 Linear and multilinear algebra; matrix theory Reduction to versal deformations of matrix pencils and matrix pairs with application to control theory