| Titre : | Observer – PID stabilization strategy for unstable first - order linear systems with large time delay (2012) |
| Auteurs : | J. F. Márquez-Rubio, Auteur ; B. del-Muro-Cuéllar, Auteur ; M. Velasco-Villa, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 51 N° 25, Juin 2012) |
| Article en page(s) : | pp. 8477-8487 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Linear system First order Stabilization Observer |
| Résumé : | This work considers the stabilization and control of a class of unstable first-order linear systems subject to a relatively large input-output time delay. As a first step, a particular observer scheme is proposed in order to predict a specific internal signal in the process. Conditions to ensure the adequate prediction convergence of the signals are formally stated. In a second step, the internal predicted signal is used to implement classical P, PI, and PID controllers providing stability conditions for the resulting closed-loop system. The proposed control strategy allows one to address time delays as large as four times the unstable time constant of the open-loop system, in contrast with the reported related literature where the maximal bound has been stated until now as two times the unstable time constant of the open-loop system. The proposed observer-based control structure considers also the tracking of step reference signals and the rejection of input step disturbances. |
| ISSN : | 0888-5885 |
| En ligne : | http://cat.inist.fr/?aModele=afficheN&cpsidt=26066775 |
