CA2217381A1 - Feedback method for controlling non-linear processes - Google Patents

Feedback method for controlling non-linear processes

Info

Publication number
CA2217381A1
CA2217381A1 CA002217381A CA2217381A CA2217381A1 CA 2217381 A1 CA2217381 A1 CA 2217381A1 CA 002217381 A CA002217381 A CA 002217381A CA 2217381 A CA2217381 A CA 2217381A CA 2217381 A1 CA2217381 A1 CA 2217381A1
Authority
CA
Canada
Prior art keywords
control
variables
control variable
values
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002217381A
Other languages
French (fr)
Other versions
CA2217381C (en
Inventor
Raymond Donald Bartusiak
Robert William Fontaine
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Chemical Patents Inc
Original Assignee
Raymond Donald Bartusiak
Robert William Fontaine
Exxon Chemical Patents, Inc.
Exxonmobil Chemical Patents Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Raymond Donald Bartusiak, Robert William Fontaine, Exxon Chemical Patents, Inc., Exxonmobil Chemical Patents Inc. filed Critical Raymond Donald Bartusiak
Publication of CA2217381A1 publication Critical patent/CA2217381A1/en
Application granted granted Critical
Publication of CA2217381C publication Critical patent/CA2217381C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
    • G05B13/048—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators using a predictor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2400/00—Characteristics for processes of polymerization
    • C08F2400/02—Control or adjustment of polymerization parameters

Abstract

A system controls a plant process (12) which includes manipulated variables (e.g. input states) and control variables (e.g. output states). The system includes sensor circuitry for providing measures of the control variables and a memory for storing a correction time constant and upper and lower limits for at least one control variable. The upper and lower limits are separated by a band of values within which the one control variable is considered to be acceptable. A processor includes data describing a process model (16) which relates costs of manipulated variables to control variables and, upon solution, further provides predicted values for the one control variable. Logic within the processor is responsive to a measured value function of the one control variable being outside the band of values, to determine minimum cost manipulated variables which result in a return of the predicted value of the one control variable to within the acceptable band of values. Control instrumentalities within the plant are operative to alter the manipulated variables (and input states) in accordance with signals from the processor.
CA002217381A 1995-04-28 1996-04-26 Feedback method for controlling non-linear processes Expired - Lifetime CA2217381C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/431,244 US5682309A (en) 1995-04-28 1995-04-28 Feedback method for controlling non-linear processes
US08/431,244 1995-04-28
PCT/US1996/005907 WO1996034324A1 (en) 1995-04-28 1996-04-26 Feedback method for controlling non-linear processes

Publications (2)

Publication Number Publication Date
CA2217381A1 true CA2217381A1 (en) 1996-10-31
CA2217381C CA2217381C (en) 2005-06-14

Family

ID=23711104

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002217381A Expired - Lifetime CA2217381C (en) 1995-04-28 1996-04-26 Feedback method for controlling non-linear processes

Country Status (18)

Country Link
US (1) US5682309A (en)
EP (1) EP0823078B1 (en)
JP (1) JP3949164B2 (en)
KR (1) KR100371728B1 (en)
CN (1) CN1183148A (en)
AT (1) ATE193771T1 (en)
AU (1) AU702101B2 (en)
BR (1) BR9608042A (en)
CA (1) CA2217381C (en)
CZ (1) CZ296539B6 (en)
DE (1) DE69608796T2 (en)
HU (1) HU225571B1 (en)
MX (1) MX9708318A (en)
MY (1) MY111933A (en)
NO (1) NO318927B1 (en)
PL (1) PL182764B1 (en)
TW (1) TW297108B (en)
WO (1) WO1996034324A1 (en)

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Also Published As

Publication number Publication date
TW297108B (en) 1997-02-01
HU225571B1 (en) 2007-03-28
AU702101B2 (en) 1999-02-11
JP3949164B2 (en) 2007-07-25
ATE193771T1 (en) 2000-06-15
BR9608042A (en) 1999-01-26
NO974959D0 (en) 1997-10-27
NO974959L (en) 1997-12-19
CZ296539B6 (en) 2006-04-12
MY111933A (en) 2001-02-28
PL323049A1 (en) 1998-03-02
AU5631496A (en) 1996-11-18
NO318927B1 (en) 2005-05-23
US5682309A (en) 1997-10-28
DE69608796D1 (en) 2000-07-13
KR19990008140A (en) 1999-01-25
HUP9802089A2 (en) 1998-12-28
WO1996034324A1 (en) 1996-10-31
EP0823078B1 (en) 2000-06-07
CZ336797A3 (en) 1998-09-16
JPH11504454A (en) 1999-04-20
CN1183148A (en) 1998-05-27
HUP9802089A3 (en) 1999-05-28
CA2217381C (en) 2005-06-14
KR100371728B1 (en) 2003-03-15
PL182764B1 (en) 2002-02-28
EP0823078A1 (en) 1998-02-11
MX9708318A (en) 1998-02-28
DE69608796T2 (en) 2000-11-23

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