System and methods for globally optimizing a process facility

• US 6,122,555 A
• Filed: 05/05/1997
• Issued: 09/19/2000
• Est. Priority Date: 05/05/1997
• Status: Expired due to Term

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell International Inc.
• Inventors: Lu, Zhuxin J.
• Primary Examiner(s): Grant, William
• Assistant Examiner(s): Garland, Steven R.
• Application Number:
  US08/850,288
• Time in Patent Office: 1,233 Days
• Field of Search: 700/2, 700/3, 700/8, 700/9, 700/19, 700/20, 700/96, 700/108, 700/44, 700/45, 700/100, 700/28, 700/29, 700/99, 705/8
• US Class Current: 700/9
• CPC Class Codes: G05B 13/048 using a predictor

Abstract

A control system and a method of operating the same are introduced that globally optimize associated processes within a process facility. The control system includes a global controller and many local controllers. The global controller monitors characteristics of the associated processes and generates, in response thereto, control data for optimizing the process facility. The local controllers monitor the associated processes and operate in accordance with the control data to varying degrees to control the monitored associated processes, thereby cooperating with the global controller to optimize the process facility.

Claims

1. A control system for controlling associated processes within a process facility, comprising:

a global controller that monitors said associated processes and generates, in response thereto, control data for optimizing said process facility; and

local controllers having a dynamic prediction task and a local linear program/quadratic program optimization task, said local controllers operating in accordance with said control data to varying degrees to predict, optimize and control said associated processes and thereby cooperate with said global controller to optimize said process facility.

2. The control system recited in claim 1 wherein said local controllers monitor said associated processes.

3. The control system recited in claim 1 wherein said global controller generates said control data as a function of an optimization parameter.

4. The control system recited in claim 3 wherein said optimization parameter is economic-based.

5. The control system recited in claim 1 wherein said global controller monitors characteristics of said associated processes.

6. The control system recited in claim 5 wherein said monitored characteristics include output data of said associated processes.

7. The control system recited in claim 5 wherein said monitored characteristics are communicated between said global controller and said local controllers.

8. The control system recited in claim 1 wherein said varying degrees of said local controllers range between compliance and noncompliance with said control data.

9. The control system recited in claim 1 wherein a particular local controller has a degree of compliance.

10. The control system recited in claim 1 wherein said global controller is centralized.

11. The control system recited in claim 1 wherein ones of said local controllers are proximate to ones of said associated processes.

12. The control system recited in claim 1 wherein said local controllers are distributed.

13. A method of operating a control system for controlling associated processes within a process facility, comprising the steps of:

globally monitoring said associated processes and generating, in response thereto, control data for optimizing said process facility; and

locally predicting, optimizing and controlling said associated processes with a local linear program/quadratic program optimization task, to varying degrees, in accordance with said control data to optimize said process facility.

14. The method of operation recited in claim 13 wherein said further comprising the step of locally monitoring said associated processes.

15. The method of operation recited in claim 13 wherein said generating step comprises the step of using an optimization parameter.

16. The method of operation recited in claim 15 wherein said optimization parameter is economic-based.

17. The method of operation recited in claim 13 wherein said globally monitoring step comprises the step of monitoring characteristics of said associated processes.

18. The method of operation recited in claim 17 wherein said monitored characteristics include output data of said associated processes.

19. The method of operation recited in claim 17 further comprising the step of communicating said monitored characteristics between local controllers and a global controller.

20. The method of operation recited in claim 13 wherein said varying degrees range between compliance and noncompliance with said control data.

21. The method of operation recited in claim 13 further comprising the step of using a particular local controller to control a particular one of said associated processes, said particular local controller complying with said control data.

22. The method of operation recited in claim 13 wherein said step of locally controlling is distributed.

23. A control system for controlling associated processes within a process facility, comprising:

a global controller that monitors characteristics of said associated processes and generates, in response thereto, control data for optimizing said process facility; and

local controllers having a dynamic prediction task and a local linear program/quadratic program optimization task, said local controllers monitoring said associated processes and operating in accordance with said control data to varying degrees to predict, optimize and control said monitored associated processes, thereby cooperating with said global controller to optimize said process facility.

24. The control system recited in claim 23 wherein said global controller generates said control data as a function of an optimization parameter.

25. The control system recited in claim 24 wherein said optimization parameter is economic-based.

26. The control system recited in claim 23 wherein said monitored characteristics are communicated between said global controller and said local controllers.

27. The control system recited in claim 23 wherein said varying degrees of said local controllers range between compliance and noncompliance with said control data.

28. The control system recited in claim 23 wherein a particular local controller has a degree of compliance.

29. The control system recited in claim 23 wherein said global controller is centralized and said process controllers are distributed.

30. The control system recited in claim 23 wherein ones of said local controllers are proximate to ones of said associated processes.

31. A control system for controlling associated processes within a process facility, comprising:

a global controller that monitors said associated processes and generates, in response thereto, control data for optimizing said process facility; and

local controllers having a dynamic prediction task, an optimization task and a dynamic control/optimization augmented range control algorithm, said local controllers operating in accordance with said control data to varying degrees to predict, optimize and control said associated processes and thereby cooperate with said global controller to optimize said process facility.

32. The control system recited in claim 31 wherein said local controllers monitor said associated processes.

33. The control system recited in claim 31 wherein said global controller generates said control data as a function of an optimization parameter.

34. The control system recited in claim 33 wherein said optimization parameter is economic-based.

35. The control system recited in claim 31 wherein said global controller monitors characteristics of said associated processes.

36. The control system recited in claim 35 wherein said monitored characteristics include output data of said associated processes.

37. The control system recited in claim 35 wherein said monitored characteristics are communicated between said global controller and said local controllers.

38. The control system recited in claim 31 wherein said varying degrees of said local controllers range between compliance and noncompliance with said control data.

39. The control system recited in claim 31 wherein a particular local controller has a degree of compliance.

40. The control system recited in claim 31 wherein said global controller is centralized.

41. The control system recited in claim 31 wherein ones of said local controllers are proximate to ones of said associated processes.

42. The control system recited in claim 31 wherein said local controllers are distributed.

43. A method of operating a control system for controlling associated processes within a process facility, comprising the steps of:

globally monitoring said associated processes and generating, in response thereto, control data for optimizing said process facility; and

locally predicting, optimizing and controlling said associated processes based upon a dynamic control/optimization augmented range control algorithm, to varying degrees, in accordance with said control data to optimize said process facility.

44. The method of operation recited in claim 43 wherein said further comprising the step of locally monitoring said associated processes.

45. The method of operation recited in claim 43 wherein said generating step comprises the step of using an optimization parameter.

46. The method of operation recited in claim 45 wherein said optimization parameter is economic-based.

47. The method of operation recited in claim 43 wherein said globally monitoring step comprises the step of monitoring characteristics of said associated processes.

48. The method of operation recited in claim 47 wherein said monitored characteristics include output data of said associated processes.

49. The method of operation recited in claim 47 further comprising the step of communicating said monitored characteristics between local controllers and a global controller.

50. The method of operation recited in claim 43 wherein said varying degrees range between compliance and noncompliance with said control data.

51. The method of operation recited in claim 43 further comprising the step of using a particular local controller to control a particular one of said associated processes, said particular local controller complying with said control data.

52. The method of operation recited in claim 43 wherein said step of locally controlling is distributed.

53. A control system for controlling associated processes within a process facility, comprising:

a global controller that monitors characteristics of said associated processes and generates, in response thereto, control data for optimizing said process facility; and

local controllers having a dynamic prediction task, an optimization task and a dynamic control/optimization augmented range control algorithm, said local controllers monitoring said associated processes and operating in accordance with said control data to varying degrees to predict, optimize and control said monitored associated processes, thereby cooperating with said global controller to optimize said process facility.

54. The control system recited in claim 53 wherein said global controller generates said control data as a function of an optimization parameter.

55. The control system recited in claim 54 wherein said optimization parameter is economic-based.

56. The control system recited in claim 53 wherein said monitored characteristics are communicated between said global controller and said local controllers.

57. The control system recited in claim 53 wherein said varying degrees of said local controllers range between compliance and noncompliance with said control data.

58. The control system recited in claim 53 wherein a particular local controller has a degree of compliance.

59. The control system recited in claim 53 wherein said global controller is centralized and said process controllers are distributed.

60. The control system recited in claim 53 wherein ones of said local controllers are proximate to ones of said associated processes.