Feedback method for controlling non-linear processes

Details Feedback method for controlling non-linear processes Feedback method for controlling non-linear processes

1995-04-28

1997-10-28

Gordon, Paul P.

Boots, shoes, and leggings

364148, 364157, 364163, 364164, G05B 1304

Patent

active

056823096

ABSTRACT:
A system controls a plant process 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 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.

REFERENCES:
patent: 3917931 (1975-11-01), Sweeney, Jr.
patent: 4349869 (1982-09-01), Prett et al.
patent: 4358822 (1982-11-01), Sanchez
patent: 4578747 (1986-03-01), Hideg et al.
patent: 4616308 (1986-10-01), Morshedi et al.
patent: 4663703 (1987-05-01), Axelby et al.
patent: 4748448 (1988-05-01), Thompson
patent: 5038269 (1991-08-01), Grimble et al.
patent: 5050064 (1991-09-01), Mayhew
patent: 5057992 (1991-10-01), Traiger
patent: 5099412 (1992-03-01), Kelley
patent: 5119468 (1992-06-01), Owens
patent: 5260865 (1993-11-01), Beauford et al.
patent: 5268834 (1993-12-01), Sanner et al.
"A Constrained Nonlinear Multivariable Control Algorithm" Institution of Chemical Engineers, vol. 68, Part A, Sep. 1990.
"Multistep, Newton-Type Control Strategies For Constrained, Nonlinear Processes" Chem Eng Res Des, vol. 67, Nov. 1989, pp. 562-577.
"A Nonlinear DMC Algorithm And Its Application To A Semibatch Polymerization Reactor" Chemical Engineering Science, vol. 47, No. 4, pp. 737-753, 1992.
"Nonlinear Feedforward/Feedback Control Structures Designed By Reference System Synthesis" Chemical Engineering Science, vol. 44 No. 9, pp. 1837-1851, Great Britain.
"An Industrial Application Of Reference System Synthesis/Generic Model Control: Wastewater .sub.pH Control", Nonlinear Process Control: Application of Generic Model Control, P.L. Lee Editor, Springer-Verlay, pp. 43-65, (1993).

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