SYSTEM AND METHOD FOR IMPROVING ACCURACY OF BASELINE MODELS

• US 20040172227A1
• Filed: 12/30/2003
• Published: 09/02/2004
• Est. Priority Date: 08/17/2001
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Aragones, James Kenneth
• Granted Patent: US 7,428,478 B2
• Time in Patent Office: Days
• US Class Current: 703/8
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: Y10S 707/99931 Database or file accessing
• CPC Class Codes: Y10S 707/99943 Generating database or data structure, e.g. via user interface

Abstract

System, method and computer-readable medium for baseline modeling a product or process. A service database contains process data. A preprocessor processes the data into a predetermined format. A baseline modeling component builds a baseline model from the preprocessed data, wherein the baseline model relates process performance variables as a function of process operating conditions.

Claims

1. A system for performing engine baseline modeling, comprising:

an engine service database containing engine data, wherein the engine data includes at least time-varying engine data;

a preprocessor for processing the engine data into a predetermined format; and

an engine baseline modeling component that builds an initial engine baseline model from the preprocessed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions,

wherein the engine baseline modeling component applies a smoothing algorithm to the initial engine baseline model to reduce effects of the time-varying engine data to generate a detrended engine baseline model.

2. The system of claim 1, wherein the smoothing algorithm includes a moving average calculation.

3. The system of claim 1, further comprising the engine baseline modeling component performing repeated applications of the smoothing algorithm to the detrended engine baseline model.

4. The system of claim 1, wherein the preprocessor comprises a data acquisition component that extracts the engine data from the engine services database.

5. The system of claim 1, wherein the preprocessor comprises a data scrubbing component that cleans the engine data.

6. The system of claim 1, wherein the preprocessor comprises a data segmenting component that segments the engine data into a plurality of groups.

7. The system of claim 1, wherein the engine baseline modeling component comprises a metric component that validates the detrended engine baseline model.

8. The system of claim 1, wherein the engine baseline modeling component comprises a heuristics component that generates rules for cleaning the preprocessed data.

9. The system of claim 1, further comprising a model diagnostics component that evaluates the performance of the detrended engine baseline model.

10. A system for performing engine baseline modeling, comprising:

an engine service database containing engine data;

a preprocessor for processing the engine data into a predetermined format, wherein the preprocessor comprises a data segmenting component that segments the engine data into a plurality of groups; and

an engine baseline modeling component that builds an initial engine baseline model from the preprocessed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions,

wherein the engine baseline modeling component identifies correlated groups of engine data based upon the initial engine baseline model,

wherein the engine baseline modeling component combines data from correlated groups, and

wherein the engine baseline modeling component builds a final engine baseline model from the combined data using a regression analysis.

11. The system of claim 10, wherein the combination of data from correlated groups is performed by utilizing a weighted average technique to fit all engine baseline parameter trends to one primary trend.

12. A system for performing engine baseline modeling, comprising:

an engine service database containing engine data;

a preprocessor for processing the engine data into a predetermined format, wherein the preprocessor comprises a data segmenting component that segments the engine data into a plurality of groups; and

an engine baseline modeling component that builds an initial engine baseline model from the preprocessed data using a regression analysis, the initial engine baseline model represented by a plurality of parameter estimates,

wherein the regression analysis relates engine performance variables as a function of engine operating conditions,

wherein the engine baseline modeling component identifies segments relating to related engines,

wherein the engine baseline modeling component smoothes the parameter estimates for each of the identified related engine segments, and

wherein the engine baseline modeling component builds a final engine baseline model from the averaged data using a regression analysis.

13. A method for performing engine baseline modeling, comprising:

storing engine data in an engine service database,

wherein the engine data includes at least time-varying engine data;

processing the engine data into a predetermined format;

building an initial engine baseline model from the processed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions,

applying a smoothing algorithm to the initial engine baseline model to reduce effects of the time-varying engine data; and

generating a detrended engine baseline model.

14. The method of claim 13, wherein the smoothing algorithm includes a moving average calculation.

15. The method of claim 13, further comprising repeatedly applying the smoothing algorithm to the detrended engine baseline model.

16. The method of claim 13, further comprising extracting the engine data from the engine services database.

17. The method of claim 13, wherein the processing step further comprises cleaning the engine data.

18. The method of claim 13, wherein the processing step further comprises segmenting the engine data into a plurality of groups.

19. The method of claim 13, further comprising validating the detrended engine baseline model.

20. The method of claim 13, further comprising generating rules for cleaning the preprocessed data.

21. The method of claim 13, further comprising evaluating the performance of the detrended engine baseline model.

22. A method for performing engine baseline modeling, comprising:

storing engine data in an engine service database;

processing the engine data into a predetermined format;

segmenting the engine data into a plurality of groups;

building an initial engine baseline model from the processed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions;

identifying correlated groups of engine data based upon the initial engine baseline model;

combining data from correlated groups; and

building a final engine baseline model from the combined data using a regression analysis.

23. The method of claim 22, wherein the step of combining of data from correlated groups comprises utilizing a weighted average technique to fit all engine baseline parameter trends to one primary trend.

35. The computer-readable medium of claim 22, wherein the one or more instructions for combining data from correlated groups comprises one or more instructions for applying a weighted average technique to fit all engine baseline parameter trends to one primary trend.

24. A method for performing engine baseline modeling, comprising:

storing engine data in an engine service database;

processing the engine data into a predetermined format;

segmenting the engine data into a plurality of groups;

building an initial engine baseline model from the processed data using a regression analysis, the initial engine baseline model represented by a plurality of parameter estimates, wherein the regression analysis relates engine performance variables as a function of engine operating conditions;

identifying segments relating to related engines;

smoothing the parameter estimates for each of the identified related engine segments; and

building a final engine baseline model from the averaged data using a regression analysis.

25. A computer-readable medium incorporating instructions for performing engine baseline modeling, comprising:

one or more instructions for storing engine data in an engine service database, wherein the engine data includes at least time-varying engine data;

one or more instructions for processing the engine data into a predetermined format;

one or more instructions for building an initial engine baseline model from the processed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions,

one or more instructions for applying a smoothing algorithm to the initial engine baseline model to reduce effects of the time-varying engine data; and

one or more instructions for generating a detrended engine baseline model.

26. The computer-readable medium of claim 25, wherein the smoothing algorithm includes a moving average calculation.

27. The computer-readable medium of claim 25, further comprising one or more instructions for repeatedly applying the smoothing algorithm to the detrended engine baseline model.

28. The computer-readable medium of claim 25, further comprising one or more instructions for extracting the engine data from the engine services database.

29. The computer-readable medium of claim 25, wherein the one or more instructions for processing further comprise one or more instructions for cleaning the engine data.

30. The computer-readable medium of claim 25, wherein the one or more instructions for processing further comprise one or more instructions for segmenting the engine data into a plurality of groups.

31. The computer-readable medium of claim 25, further comprising one or more instructions for validating the detrended engine baseline model.

32. The computer-readable medium of claim 25, further comprising one or more instructions for generating rules for cleaning the preprocessed data.

33. The computer-readable medium of claim 25, further comprising one or more instructions for evaluating the performance of the detrended engine baseline model.

34. A computer-readable medium incorporating instructions for performing engine baseline modeling, comprising:

one or more instructions for storing engine data in an engine service database;

one or more instructions for processing the engine data into a predetermined format;

one or more instructions for segmenting the engine data into a plurality of groups;

one or more instructions for building an initial engine baseline model from the processed data using a regression analysis, wherein the regression analysis relates engine performance variables as a function of engine operating conditions;

one or more instructions for identifying correlated groups of engine data based upon the initial engine baseline model;

one or more instructions for combining data from correlated groups; and

one or more instructions for building a final engine baseline model from the combined data using a regression analysis.

36. A computer-readable medium incorporating instructions for performing engine baseline modeling, comprising:

one or more instructions for storing engine data in an engine service database;

one or more instructions for processing the engine data into a predetermined format;

one or more instructions for segmenting the engine data into a plurality of groups;

one or more instructions for building an initial engine baseline model from the processed data using a regression analysis, the initial engine baseline model represented by a plurality of parameter estimates, wherein the regression analysis relates engine performance variables as a function of engine operating conditions;

one or more instructions for identifying segments relating to related engines;

one or more instructions for smoothing the parameter estimates for each of the identified related engine segments; and

one or more instructions for building a final engine baseline model from the averaged data using a regression analysis.