Method and apparatus for assessing performance of an environmental control system

• US 7,031,880 B1
• Filed: 05/07/2004
• Issued: 04/18/2006
• Est. Priority Date: 05/07/2004
• Status: Active Grant

• Current Assignee: Johnson Controls Technology Company (Johnson Controls International plc)
• Original Assignee: Johnson Controls Technology Company (Johnson Controls International plc)
• Inventors: Seem, John E., Huth, William A., Fraune, Robert J., Ky, Tri V., Lewis, Anita M.
• Primary Examiner(s): Assouad, Patrick J.
• Application Number:
  US10/841,107
• Time in Patent Office: 711 Days
• Field of Search: None
• US Class Current: 702/182
• CPC Class Codes: G05B 23/0216 Human interface functionality, e.g. monitoring system providing help to the user in the selection of tests or in its configuration
• CPC Class Codes: G05B 23/0232 based on qualitative trend analysis, e.g. system evolution

Abstract

A method and apparatus is disclosed for assessing performance of control applications in an environmental control network and for diagnosing performance problems. The apparatus includes a performance assessment and diagnostic display comprising a facility navigation tree, a system navigation tree and a performance/diagnostics window. The facility navigation tree and system navigation tree may be used to select the facilities and systems that are to have their associated control applications assessed and/or diagnosed. The performance/diagnostics window includes graphs of performance indictors that are indicative of performance levels for the included control applications. The system tree may be used to delve to more detailed views of the performance indicators to obtain additional information that may help to diagnose problems noted in performance of the selected control applications.

Claims

1. A method for analyzing performance of control applications in an environmental control network, comprising:

receiving at least one performance indicator for each control application;

identifying at least one control application experiencing degraded performance using a first view of the performance indicators; and

obtaining additional information regarding the at least one control application using a second view of the performance indicators.

2. The method of claim 1, wherein first and second views each include a plurality of continuums ranging from good to poor performance with the performance indicators plotted on the continuums.

3. The method of claim 2, wherein a different continuum is provided for each type of control application.

4. The method of claim 1, wherein the first view is a summary view of the performance indicators and the second view is a more detailed view of the performance indicators.

5. The method of claim 4, wherein the summary view displays the performance indicators for only a worst performing control application among a group of control applications.

6. The method of claim 1, wherein the identifying and obtaining steps are performed by navigating at least one tree structure.

7. The method of claim 1, wherein the control applications are associated with an HVAC system.

8. The method of claim 1, wherein the performance indicators represent control effort and accuracy.

9. The method of claim 8, wherein the performance indicators are exponentially weighted moving averages.

10. The method of claim 1, wherein the first and second views each include a plurality of dot plots ranging from good to poor performance.

11. The method of claim 10, wherein a separate dot plot is provided for each type of control application in the first view.

12. The method of claim 10, wherein a separate dot plot is provided for each type of control loop in the control applications in the second view.

13. The method of claim 1, further including displaying trend buffer data for the at least on control application.

14. The method of claim 13, further including saving the trend buffer data for display at a later time.

15. The method of claim 1, further including displaying a mechanical view of the environmental control network.

16. The method of claim 15, wherein the mechanical view allows a user to inspect and alter values in the at least one control application.

17. The method of claim 1, further including displaying a control diagram view of the environmental control network.

18. The method of claim 17, wherein the control diagram view allows a user to inspect and alter a control strategy used for the at least one control application.

19. The method of claim 1, further including using statistical analysis to identify a mean and standard deviation for each performance indicator.

20. The method of claim 19, wherein the mean and standard deviation for each performance indicator are used to plot each performance indicator on a continuum ranging from good to poor.

21. A computer program product for analyzing performance of control applications in an environmental control network, the program product in combination with and embodied on a computer-readable medium and comprising machine-readable program code for causing, when executed, one or more machines to perform the following method steps:

displaying performance indicators for the control applications using a first view that allows at least one control application exhibiting degraded performance to be identified; and

displaying performance indicators using a second view that provides additional details regarding the performance of the at least one control application.

22. The program product of claim 21, wherein first and second views each include a plurality of continuums ranging from good to poor performance with the performance indicators plotted on the continuums.

23. The program product of claim 22, wherein a different continuum is provided for each type of control application.

24. The program product of claim 21, wherein the first view is a summary view of the performance indicators and the second view is a more detailed view of the performance indicators.

25. The program product of claim 24, wherein the summary view shows the performance indicators for only a worst performing control loop for each control application.

26. The program product of claim 21, wherein the program code causes at least one tree structure to be displayed for selecting the first view and the second view.

27. The program product of claim 21, wherein the control applications are associated with an HVAC system.

28. The program product of claim 21, wherein the performance indicators represent control effort and accuracy.

29. The program product of claim 28, wherein the performance indicators are exponentially weighted moving averages.

30. The program product of claim 21, wherein the first and second views each include a plurality of dot plots ranging from good to poor performance.

31. The program product of claim 30, wherein a separate dot plot is provided for type of control application in the first view.

32. The program product of claim 30, wherein a separate dot plot is provided for each type of control loop in the control applications in the second view.

33. The program product of claim 21, wherein the program code causes trend buffer data to be displayed for the at least one control application.

34. The program product of claim 33, wherein the program code causes trend buffer data to be saved for display at a later time.

35. The program product of claim 21, wherein the program code causes a mechanical view of the environmental control network to be displayed.

36. The program product of claim 35, wherein the mechanical view allows a user to inspect and alter values in the at least one control application.

37. The program product of claim 21, the program code causes a control diagram view of the environmental control network to be displayed.

38. The program product of claim 37, wherein the control diagram view allows a user to inspect and alter a control strategy used for the at least one control application.

39. A method for diagnosing performance of control applications in an environmental control network, comprising:

receiving at least one performance indicator for each control application;

identifying at least one control application exhibiting degraded performance using a first view of the performance indicators; and

obtaining additional information regarding the at least one control application using a second view of the performance indicators, the second view providing additional information on the at least one control application to permit a diagnosis of a possible cause of the degraded performance.

40. The method of claim 39, wherein first and second views each include a plurality of continuums ranging from good to poor performance with the performance indicators plotted on the continuums.

41. The method of claim 40, wherein a different continuum is provided for each type of control application.

42. The method of claim 39, wherein the first view is a summary view of the performance indicators and the second view is a more detailed view of the performance indicators.

43. The method of claim 42, wherein the summary view displays the performance indicators for only a worst performing control loop for each control application.

44. The method of claim 39, wherein the identifying and obtaining steps are performed by navigating at least one tree structure.

45. The method of claim 39, wherein the control applications are associated with an HVAC system.

46. The method of claim 39, wherein the performance indicators represent control effort and accuracy.

47. The method of claim 46, wherein the performance indicators are exponentially weighted moving averages.

48. The method of claim 39, wherein the first and second views each include a plurality of dot plots ranging from good to poor performance.

49. The method of claim 48, wherein a separate dot plot is provided for type of control application in the first view.

50. The method of claim 48, wherein a separate dot plot is provided for each type of control loop in the control applications in the second view.

51. The method of claim 39, further including displaying trend buffer data for the at least one control application.

52. The method of claim 51, further including saving the trend buffer data for display at a later time.

53. The method of claim 39, further including displaying a mechanical view of the environmental control network.

54. The method of claim 53, wherein the mechanical view allows a user to inspect and alter values in the at least one control application.

55. The method of claim 39, further including displaying a control diagram view of the environmental control network.

56. The method of claim 55, wherein the control diagram view allows a user to inspect and alter a control strategy used for the at least one control application.

57. The method of claim 39, further including using statistical analysis to identify a mean and standard deviation for each performance indicator.

58. The method of claim 57, wherein the mean and standard deviation for each performance indicator are used to plot each performance indicator on a continuum ranging from good to poor.