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1. WO2000041043 - A NOVEL PREDICTIVE AND SELF-TUNING PI CONTROL APPARATUS FOR EXPANDED PROCESS CONTROL APPLICATIONS

Publication Number WO/2000/041043
Publication Date 13.07.2000
International Application No. PCT/SG1999/000138
International Filing Date 06.12.1999
Chapter 2 Demand Filed 26.04.2000
IPC
G05B 11/42 2006.01
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
11Automatic controllers
01electric
36with provision for obtaining particular characteristics, e.g. proportional, integral, differential
42for obtaining a characteristic which is both proportional and time-dependent, e.g. P. I., P. I. D.
G05B 13/04 2006.01
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
13Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
02electric
04involving the use of models or simulators
CPC
G05B 11/42
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
11Automatic controllers
01electric
36with provision for obtaining particular characteristics, e.g. proportional, integral, differential
42for obtaining a characteristic which is both proportional and time-dependent, e.g. P.I., P.I.D.
G05B 13/042
GPHYSICS
05CONTROLLING; REGULATING
BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
13Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
02electric
04involving the use of models or simulators
042in which a parameter or coefficient is automatically adjusted to optimise the performance
Applicants
  • NATIONAL UNIVERSITY OF SINGAPORE [SG/SG]; 10 Kent Ridge Crescent Singapore Singapore 119260, SG (AllExceptUS)
  • TAN, Kok, Kiong [SG/SG]; SG (UsOnly)
  • LEE, Tong, Heng [SG/SG]; SG (UsOnly)
  • HUANG, Sunan [CN/SG]; SG (UsOnly)
  • WANG, Qing, Guo [SG/SG]; SG (UsOnly)
Inventors
  • TAN, Kok, Kiong; SG
  • LEE, Tong, Heng; SG
  • HUANG, Sunan; SG
  • WANG, Qing, Guo; SG
Agents
  • SURESAN, Sachithananthan; C/O Tan Rajah & Cheah 9 Battery Road, #15-00 Straits Trading Building Singapore 049910, SG
Priority Data
9804845-730.12.1998SG
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A NOVEL PREDICTIVE AND SELF-TUNING PI CONTROL APPARATUS FOR EXPANDED PROCESS CONTROL APPLICATIONS
(FR) NOUVEL APPAREIL DE COMMANDE PI PREDICTIF ET A AUTOREGLAGE POUR APPLICATIONS ETENDUES DE COMMANDE DE PROCESSUS
Abstract
(EN)
A predictive and self-tuning PI controller (12) includes apparatus for variably assigning gains thereto in accordance with specified time functions following a change in set-point. The control gains (18, 20, 22) are computed in accordance with a plurality of input parameters and subsequently continuously adjusted to set-point errors based on a GPC approach thereby to optimize performance indices derived from simple and classical user specifications. Variation and tuning of control gains (18, 20, 22) in accordance with set-point errors permits the PI controller (12) to be useful in the general area of process control and applicable to a wider range of processes compared to traditional PI control, including time-delay processes, unstable processes and processes with time-varying dynamics.
(FR)
L'invention concerne un organe de commande (12) PI prédictif et à autoréglage qui comporte un appareil lui attribuant des gains de manière variable selon des fonctions de temps spécifiées consécutives à une modification de point de consigne. Les gains de commande (18, 20, 22) sont calculés en fonction de plusieurs paramètres d'entrée, et ajustés ultérieurement en continu par rapport à des erreurs de point consigne sur la base d'une commande prédictive généralisée (GPC), ce qui permet d'optimiser les indices de performance obtenus à partir de spécifications simples et classiques d'utilisateur. La variation et le réglage de gains de commande (18, 20, 22) en fonction d'erreurs de point consigne permet d'utiliser l'organe de commande PI (12) dans le domaine général de la commande de processus et de l'appliquer à une gamme plus étendue de processus, par comparaison avec une commande PI classique, y compris des processus de temporisation, des processus instables et des processus à dynamique variant dans le temps.
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