System for real-time economic optimizing of manufacturing process control

• US 6,038,540 A
• Filed: 11/04/1997
• Issued: 03/14/2000
• Est. Priority Date: 03/17/1994
• Status: Expired due to Term

• Current Assignee: Dow Global Technologies LLC (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Koolen, Johannes L. A., Wassink, Steven Groot, Sprenkels, Jacobus C. M., Krist, Johannes H. A., Lapere, Martine R.
• Primary Examiner(s): Poinvil, Frantzy
• Application Number:
  US08/963,882
• Time in Patent Office: 861 Days
• Field of Search: 705/8, 705/9, 705/11, 364/148.01, 364/151, 364/152, 364/154, 364/156, 364/161-163
• US Class Current: 705/7.33
• CPC Class Codes: G05B 13/00 Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion G05B19/00 takes precedence
• CPC Class Codes: G06Q 10/06375 Prediction of business process outcome or impact based on a proposed change
• CPC Class Codes: G06Q 30/0201 Market modelling; Market analysis; Collecting market data
• CPC Class Codes: G06Q 30/0204 Market segmentation
• CPC Class Codes: G06Q 30/0206 Price or cost determination based on market factors

Abstract

The present invention provides an adaptive process control and profit depiction system which is responsive to both process measurement input signals, economic inputs, and physical environment inputs. The process control system features an interactive optimization modeling system for determining manipulated process variables (also known as setpoints). These manipulated process variables are used to position mechanisms which control attributes of a manufacturing system, such as a valve controlling the temperature of a coolant or a valve controlling the flow rate in a steam line.

Claims

1. An apparatus having physical process equipment, said physical process equipment having sensors for creating sensor output signals indicative of process attributes in said physical process equipment as the apparatus handles at least one raw material, product, or resource in performing a useful function, each product, resource, and raw material having a respective affiliated economic variable whose quantity is defined by a monetary value, said apparatus comprising:

a computer monitor for producing a graphical display of variable manufacturing respective to said physical process equipment;

a real-time computer in communication with said sensor output signals and said computer monitor, said real-time computer further comprising

means for reading said sensor output signals as input signals indicative of measured process attributes in said physical process equipment,

means for periodically acquiring at least one said monetary value,

means for defining a steady state status regarding said input signals,

means, responsive to the steady state status, for generating a reconciled input signal set from said input signals,

means for determining a first estimate of the variable manufacturing margin from said reconciled input signal set and at least one acquired monetary value,

means for determining a second estimate of the variable manufacturing margin from said input signals and at least one acquired monetary value,

means for executing a smoothing process on said input signals to determine a smoothed input signal set,

means for determining a third estimate of the variable manufacturing margin from said smoothed input signal set and at least one acquired monetary value,

means for generating and displaying, on the computer monitor, at least one first graphical information token correspondent to said first estimate of variable manufacturing margin, at least one second graphical information token correspondent to said second estimate of variable manufacturing margin, and at least one third graphical information token correspondent to said third estimate of variable manufacturing margin; and

a real-time communication connection between said means for periodically acquiring at least one said monetary value and a market information computer having recent monetary values respective to said products, raw materials, and resources.

2. The apparatus according to claim 1, wherein said monetary value represents the market price of at least one said raw material, product, or resource.

3. The apparatus according to claim 2, wherein said means for generating a reconciled input signal set includes Lagrangian Multiplier means for deriving the reconciled input signal set and at least one associated Lagrangian Multiplier using the Method of Lagrangian Multipliers.

4. The apparatus according to claim 1, wherein said means for generating a reconciled input signal set includes Lagrangian Multiplier means for deriving the reconciled input signal set and at least one associated Lagrangian Multiplier using the Method of Lagrangian Multipliers.

5. The apparatus according to claim 1 wherein the means for defining a steady state status regarding said input signals further comprises noise influence determination means for said input signals and forcing function influence determination means for said input signals.

6. The method according to claim 1, wherein said real-time computer further comprises means for determining at least one significance status value related to said first estimate of the variable manufacturing margin and wherein said apparatus further comprises means for generating and displaying, on the computer monitor, at least one message label associated with said significance status value.

7. The apparatus according to claim 2 wherein the means for defining a steady state status regarding said input signals further comprises noise influence determination means for said input signals and forcing function influence determination means for said input signals.

8. The apparatus according to claim 7, wherein said means for generating a reconciled input signal set includes Lagrangian Multiplier means for deriving the reconciled input signal set and at least one associated Lagrangian Multiplier using the Method of Lagrangian Multipliers.

9. A profit display method for depicting the profitability of an operating apparatus having physical process equipment, said physical process equipment having sensors for creating sensor output signals indicative of process attributes in said physical process equipment as the apparatus handles at least one raw material, product, or resource in performing a useful function, each product, resource, and raw material having a respective affiliated economic variable whose quantity is defined by a monetary value, comprising the steps of:

providing a computer monitor for producing a graphical display of variable manufacturing margins respective to said physical process equipment;

providing a real-time computer in communication with said sensor output signals, said computer monitor and a market information computer having recent monetary values respective to said products and said raw materials and said resources;

reading into said real-time computer said sensor output signals as input signals indicative of measured process attributes in said physical process equipment;

acquiring into said real-time computer the monetary value of at least one said raw material, product, or resource from said market information computer;

determining in said real-time computer a first estimate, a second estimate, and a third estimate of said variable manufacturing margin;

generating, in said real-time computer, display output data for at least one first graphical information token correspondent to said first estimate of variable manufacturing margin, at least one second graphical information token correspondent to said second estimate of variable manufacturing margin, and at least one third graphical information token correspondent to said third estimate of variable manufacturing margin; and

displaying, on the computer monitor, at least one said first graphical information token, at least one said second graphical information token, and at least one said third graphical information token respective to said display output data;

said step of determining said first, second, and third estimates of said variable manufacturing margin further comprising the steps of;

defining a steady state status regarding said input signals;

generating a reconciled input signal set from said input signals in response to the steady state status;

determining said first estimate of the variable manufacturing margin from said reconciled input signal set and said monetary values;

determining said second estimate of the variable manufacturing margin from said input signals and said monetary values;

executing a smoothing process on said input signals to determine a smoothed input signal set; and

determining said third estimate of the variable manufacturing margin from said smoothed input signal set and said monetary values.

10. The method according to claim 9, wherein said monetary value represents the market price of at least one said raw material, product, or resource.

11. The method according to claim 10, wherein the step of generating a reconciled input signal set further comprises using the Method of Lagrangian Multipliers to further derive at least one associated Lagrangian Multiplier.

12. The method according to claim 10, wherein the step of defining the steady state status further comprises the steps of determining the influence of noise in said input signals and determining the influence of a forcing function in said input signals.

13. The method according to claim 12, wherein the step of generating a reconciled input signal set further comprises using the Method of Lagrangian Multipliers to further derive at least one associated Lagrangian Multiplier.

14. The method according to claim 9, wherein the step of generating a reconciled input signal set further comprises using the Method of Lagrangian Multipliers to further derive at least one associated Lagrangian Multiplier.

15. The method according to claim 9, wherein the step of defining the steady state status further comprises the steps of determining the influence of noise in said input signals and determining the influence of a forcing function in said input signals.

16. The method according to claim 9, wherein said profit display method further comprises the steps of:

determining at least one significance status value related to said first estimate of the variable manufacturing margin;

generating at least one message label associated with said significance status value; and

displaying, on the computer monitor, said message label.

17. An apparatus having physical process equipment, said physical process equipment having sensors for creating sensor output signals indicative of process attributes in said physical process equipment as the apparatus handles at least one raw material, product, or resource in performing a useful function, each product, resource, and raw material having a respective affiliated economic variable whose quantity is defined by a monetary value, said apparatus comprising:

a computer monitor for producing a graphical display of variable manufacturing margins respective to said physical process equipment;

a real-time computer in communication with said sensor output signals and said computer monitor, said real-time computer further comprising

means for reading said sensor output signals as input signals indicative of measured process attributes in said physical process equipment,

means for periodically acquiring at least one said monetary value,

means for defining a steady state status regarding said input signals,

means, responsive to the steady state status, for generating a reconciled input signal set from said input signals,

means for determining a first estimate of the variable manufacturing margin from said reconciled input signal set and at least one acquired monetary value,

means for determining a second estimate of the variable manufacturing margin from said input signals and at least one acquired monetary value, and

means for generating and displaying, on the computer monitor, at least one first graphical information token correspondent to said first estimate of variable manufacturing margin and at least one second graphical information token correspondent to said second estimate of variable manufacturing margin; and

a real-time communication connection between said means for periodically acquiring at least one said monetary value and a market information computer having recent monetary values respective to said products, raw materials, and resources.

18. A profit display method for depicting the profitability of an operating apparatus having physical process equipment, said physical process equipment having sensors for creating sensor output signals indicative of process attributes in said physical process equipment as the apparatus handles at least one raw material, product, or resource in performing a useful function, each product, resource, and raw material having a respective affiliated economic variable whose quantity is defined by a monetary value, comprising the steps of:

providing a computer monitor for producing a graphical display of variable manufacturing respective to said physical process equipment;

providing a real-time computer in communication with said sensor output signals, said display system, and a market information computer having recent monetary values respective to said products and said raw materials and said resources;

reading into said real-time computer said sensor output signals as input signals indicative of measured process attributes in said physical process equipment;

acquiring into said real-time computer the monetary value of at least one said raw material, product, or resource from said market information computer;

determining in said real-time computer a first estimate, a second estimate, and a third estimate of said variable manufacturing margin;

generating, in said real-time computer, display output data for at least one first graphical information token correspondent to said first estimate of variable manufacturing margin, at least one second graphical information token correspondent to said second estimate of variable manufacturing margin, and at least one third graphical information token correspondent to said third estimate of variable manufacturing margin; and

displaying, on the computer monitor, at least one said first graphical information token and at least one said second graphical information token respective to said display output data;

said step of determining said first and second estimates of said variable manufacturing margin further comprising the steps of;

defining a steady state status regarding said input signals;

generating a reconciled input signal set from said input signals in response to the steady state status;

determining said first estimate of the variable manufacturing margin from said reconciled input signal set and said monetary values; and

determining said second estimate of the variable manufacturing margin from said input signals and said monetary values.