Title :
Robust predictive PI controller
Author :
De la Cruz, J.M. ; Dormido, Sebastian ; Velasco, Francisco
Author_Institution :
Dept. of Comput. Sci. & Autom. Control, Complutense Univ., Madrid, Spain
Abstract :
A robust discrete-time PI controller can be designed for stable systems based on a simple model. The controller has three tuning parameters, one of them being the sampling period, which can be chosen from the step response of the plant. The relationships between the parameters assuring the stability of the system are derived. The structure of the controller is a particular case of Internal Model Control (IMC) (Morari and Zafiriou, 1989), and can also be used to control processes with large dead times. The paper establishes the model and derives the discrete controller. The conditions for asymptotic stability of the closed-loop system for an unknown stable plant are derived. The paper applies the proposed scheme to plant with large dead times and its relationship with the predictive PI controller of (Hagglund, 1992) is shown
Keywords :
closed loop systems; discrete time systems; predictive control; robust control; step response; two-term control; Internal Model Control; asymptotic stability; closed-loop system; discrete controller; large dead times; parameters; plant; robust discrete-time PI controller; robust predictive PI controller; sampling period; stability; stable systems; step response; three tuning parameters; unknown stable plant; Asymptotic stability; Automatic control; Closed loop systems; Computer science; Control systems; Process control; Regulators; Robust control; Robustness; Sampling methods;
Conference_Titel :
Systems, Man and Cybernetics, 1993. 'Systems Engineering in the Service of Humans', Conference Proceedings., International Conference on
Conference_Location :
Le Touquet
Print_ISBN :
0-7803-0911-1
DOI :
10.1109/ICSMC.1993.390684
