Method for detecting sources of faults or defective measuring sensors by positive case modeling and partial suppression of equations

• US 20090083573A1
• Filed: 07/18/2005
• Published: 03/26/2009
• Est. Priority Date: 08/10/2004
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Mauser, Hans, Hillermeier, Claus, Hoever, Georg
• Granted Patent: US 7,877,240 B2
• Time in Patent Office: Days
• US Class Current: 714/3
• CPC Class Codes: G05B 17/02 electric
• CPC Class Codes: G05B 9/02 electric

Abstract

A method establishes a global system model equation including model equations, which contain parameters, of individual components that form the global system. According to said method, the parameters of the individual components are detected using sensor values from the sensors that are allocated to the individual components and it is determined whether it is determined whether it is possible to adapt the parameters to the sensor values and to solve the global system model equation.

Claims

1-10. -10. (canceled)

11. A method for monitoring a complex technical system in its entirety, comprising:

establishing an overall system model equation including model equations or model equation parts of individual components forming the technical system, said model equations or said model equation parts having parameters, each component being associated with at least one respective parameter;

acquiring values for the parameters of the individual components using data from sensors assigned to said individual components; and

adjusting the parameters to solve the overall system model equation.

12. The method as claimed in claim 11, wherein

if it is determined that it is not possible to solve the overall system equation by adjusting the parameters, suppressing model equations or model equation parts assigned to respective components cumulatively and iteratively from the overall system model equation to solve a remaining overall system model equation, resulting in detection of a respective defective component or defective sensor.

13. The method as claimed in claim 12, wherein

after all model equations or model equation parts associated with defective components have been suppressed, individual model equations or model equation parts having correct associated parameters are added to the overall system model equation in place of suppressed model equations or model equation parts to detect defective sensors.

14. The method as claimed in claim 12, wherein

a Jacobi matrix is generated to determine an order for suppression of the model equations or model equation parts assigned to the components or the measuring sensors.

15. The method as claimed in claim 12, wherein

partial results from previous cumulative and iterative suppression of model equations or model equation parts are used in future adjustments of parameters or for suppression of model equations or model equation parts.

16. The method as claimed in claim 12, further comprising:

displaying the defective component or defective sensor.

17. The method as claimed in claim 12, wherein

the defective component or the defective sensor is removed from the technical system.

18. The method as claimed in claim 12, wherein the defective component or the defective sensor is replaced by a properly functioning component or a properly functioning sensor.

19. The method as claimed in claim 13, wherein:

a Jacobi matrix is generated to determine an order for suppression of the model equations or model equation parts assigned to the components or the measuring sensors.

20. The method as claimed in claim 19, wherein:

partial results from previous cumulative and iterative suppression of model equations or model equation parts are used in future adjustments of parameters or for suppression of model equations or model equation parts.

21. The method as claimed in claim 20, further comprising:

displaying the defective component or defective sensor.

22. The method as claimed in claim 21, wherein

the defective component or the defective sensor is removed from the technical system.

23. The method as claimed in claim 22, wherein

the defective component or the defective sensor is replaced by a properly functioning component or a properly functioning sensor.

24. A device to monitor a complex technical system in its entirety, the device comprising:

an equation unit to establish an overall system model equation including model equations or model equation parts of individual components forming the technical system, said model equations or said model equation parts having parameters, each component being associated with at least one respective parameter;

an acquisition unit to acquire values for the parameters of the individual components using data from sensors assigned to said individual components; and

an adjustment unit to adjust the parameters to solve the overall system model equation.

25. A computer-readable medium recording medium on which is recorded a program for monitoring a complex technical system in its entirety, the program causing a computer to perform:

establishing an overall system model equation including model equations or model equation parts of individual components forming the technical system, said model equations or said model equation parts having parameters, each component being associated with at least one respective parameter;

acquiring values for the parameters of the individual components using data from sensors assigned to said individual components; and

adjusting the parameters to solve the overall system model equation.