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Constraint and limit feasibility process in process control system optimizer procedure

A procedure, a feasible technique, applied in the field of feasibility processing, which can solve the problem that the online or real-time optimization procedure is not very useful

Active Publication Date: 2007-02-14
FISHER-ROSEMOUNT SYST INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this technique removes the burden of excessive computation in an offline environment, it needs to deal with additional offline optimization problems and is not very useful for online or real-time optimization programs

Method used

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  • Constraint and limit feasibility process in process control system optimizer procedure
  • Constraint and limit feasibility process in process control system optimizer procedure
  • Constraint and limit feasibility process in process control system optimizer procedure

Examples

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Embodiment Construction

[0026] see now figure 1 , a process control system 10 includes a process controller 11 communicatively connected to a data logging station 12 and to one or more host workstations or computers 13 (which may be any type of personal computer, workstation, etc.), each The main workstation or computer 13 has a display screen 14 . Controller 11 is also connected to field devices 15-22 through input / output (I / O) cards 26 and 28. The data logging station 12 can be any conceivable type of data collection unit, with any conceivable type of memory and any conceivable or known software, hardware or firmware for storing data; and can be separate from a workstation 13 (such as figure 1 shown in ) or be part of a workstation 13. As an example, controller 11 may be the DeltaV® sold by Emerson Process Management TM A controller is communicatively connected to the host computer 13 and the data logging station 12 via, for example, an Ethernet connection or any other desired communication netw...

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PUM

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Abstract

An optimization technique for use in driving a process plant controller, such as a model predictive controller, uses an organized, systematic but computationally simple method of relaxing or redefining manipulated, control and / or auxiliary variable constraints when there is no feasible optimal solution within pre-established constraints, to thereby develop an achievable solution for use by the controller. The optimization routine uses penalized slack variables and / or redefines the constraint model in conjunction with the use of penalty variables to develop a new objective function, and then uses the new objective function to determine a control solution that bests meets the original constraint limits.

Description

[0001] related application [0002] This application is a continuation-in-part of U.S. Patent Application Serial No. 10 / 241,350, filed September 11, 2002, entitled "Integrated Model Predictive Control and Optimization Within a Process Control System," which is hereby expressly Please include the disclosed content by reference. technical field [0003] This patent relates generally to process control systems and, in particular, to the determination of constraints and limits in process control system optimization procedures when used with, for example, model predictive controllers to control process facilities Feasibility treatment. Background technique [0004] Process control systems, such as those used in chemical, petroleum, or other processes, such as distributed or scalable process control systems, typically include one or more process controllers that can be controlled by analog, digital, or analog / digital The combination bus is in communication with each other, with ...

Claims

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Application Information

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IPC IPC(8): G05B13/04G06F17/00G05B11/32G05B13/02
CPCG05B13/042G05B13/048G05B11/32G05B13/04
Inventor 威廉·沃杰茨尼斯特伦斯·布莱文斯马克·尼克松彼得·沃杰茨尼斯
Owner FISHER-ROSEMOUNT SYST INC
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