par Yame, Joseph ;Hanus, Raymond
Référence Proceedings of the American Control Conference, 4, page (3215-3220)
Publication Publié, 2001
Article révisé par les pairs
Résumé : The purpose of this paper is the study of controllability properties of a continuous-time system controlled by a digital controller. The study is carried out in the modern lifting framework in which the continuous-time periodicity of such an overall system, called also a sampled-data system, is converted into time-invariance of an infinite-dimensional input/output system in discrete-time. Different concepts of controllability related directly to the continuous-time behavior of sampled-data systems are introduced, namely exact, approximate and null controllability. It is shown that the two former notions never occur in sampled-data systems while the latter notion is a generic property for these systems.