INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
MPC for Tracking zone regions
Autor/es:
FERRAMOSCA, ANTONIO; LIMÓN, DANIEL; GONZÁLEZ, ALEJANDRO HERNÁN; ODLOAK, DARCI; CAMCHO, EDUARDO FERNÁNDEZ
Revista:
JOURNAL OF PROCESS CONTROL
Editorial:
Elsevier
Referencias:
Año: 2010 vol. 20 p. 506 - 516
ISSN:
0959-1524
Resumen:
This paper deals with the problem of tracking target sets using a model predictive control (MPC) law. Some MPC applications require a control strategy in which some system outputs are controlled within specified ranges or zones (zone control), while some others variables - possibly including input variables - are steered to fixed target or set-point. In real applications, this problema is often overcome by including and excluding an appropriate penalization for the output errors in the control cost function. In this way, throughout the continuous operation of the process, the control system keeps switching from one controller to another, and even if a stabilizing control law is developed for each of the control configurations, switching among stable controllers notnecessarily produces a stable closed loop system. From a theoretical point of view, the control objective of this kind of problem can be seen as a target set (in the output space) instead of a target point, since inside the zones there are no preferences between one point or another. In this work, a stable MPC formulation for constrained linear systems, with several practical properties is developed for this scenario. The concept of distance from a point to a set is exploited to propose an additional cost term, which ensures both, recursive feasibility and local optimality. The performance of the proposed strategy is illustrated by simulation of an ill-conditioned distillation column.