FAULT DETECTION SYSTEM AND ASSOCIATED METHOD

• US 20140167810A1
• Filed: 12/17/2012
• Published: 06/19/2014
• Est. Priority Date: 12/17/2012
• Status: Active Grant

• Current Assignee: GE Infrastructure Technology, LLC (General Electric Company)
• Original Assignee: General Electric Company
• Inventors: Neti, Prabhakar, Zhang, Pinjia
• Granted Patent: US 9,541,606 B2
• Time in Patent Office: Days
• US Class Current: 324/765.01
• CPC Class Codes: G01M 13/045 Acoustic or vibration analysis
• CPC Class Codes: G01R 31/34 Testing dynamo-electric machines
• CPC Class Codes: G01R 31/343 in operation

Abstract

A method implemented using a controller based device includes receiving a measured electrical signal from an electrical device of an electromechanical device and receiving a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device. The method further includes determining a first signal signature based on the measured electrical signal and determining a second signal signature based on the measured vibration signal. The method also includes determining a diagnostic parameter based on the first signal signature and the second signal signature and determining a fault in the mechanical device based on the diagnostic parameter.

Claims

1. A method, comprising:

receiving a measured electrical signal from an electrical device of an electromechanical device;

receiving a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device;

determining a first signal signature based on the measured electrical signal;

determining a second signal signature based on the measured vibration signal;

determining a diagnostic parameter based on the first signal signature and the second signal signature; and

determining a fault in the mechanical device based on the diagnostic parameter.

2. The method of claim 1, wherein the electrical signal is representative of at least one of a measured current, a measured voltage of the electrical device.

3. The method of claim 1, wherein determining the first signal signature comprises determining a spectrum of the electrical signal.

4. The method of claim 1, wherein determining the second signal signature comprises determining a spectrum of the vibration signal.

5. The method of claim 1, further comprising determining a third signal signature based on the first signal signature and the second signal signature.

6. The method of claim 5, further comprising determining the diagnostic parameter based on the third signal signature.

7. The method of claim 6, wherein the diagnostic parameter comprises an average value, a peak value, or a median value of at least one of the first signal signature, the second signal signature and the third signal signature.

8. The method of claim 1, wherein determining the fault of the mechanical device comprises comparing the diagnostic parameter with a predefined threshold value.

9. A system, comprising:

a controller based device configured to;

receive a measured electrical signal from an electrical device of an electromechanical device;

receive a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device;

determine a first signal signature based on the measured electrical signal;

determine a second signal signature based on the measured vibration signal;

determine a diagnostic parameter based on the first signal signature and the second signal signature; and

determine a fault of the drivetrain based on the diagnostic parameter.

10. The system of claim 9, wherein the measured electrical signal is representative of at least one of a measured current, a measured voltage of the electrical device.

11. The system of claim 9, wherein the controller based device is configured to determine the first signal signature by determining a spectrum of the electrical signal.

12. The system of claim 9, wherein the controller based device is configured to determine the second signal signature by determining a spectrum of the vibration signal.

13. The system of claim 9, wherein the controller based device is further configured to determine a third signal signature based on the first signal signature and the second signal signature.

14. The system of claim 13, wherein the controller based device is further configured to determine the diagnostic parameter based on the third signal signature.

15. The system of claim 14, wherein the controller based device is configured to determine the diagnostic parameter by computing at least one of an average value, a peak value, a median value of at least one of the first signal signature, the second signal signature and the third signal signature.

16. The system of claim 9, wherein the controller based device is configured to determine the fault of the mechanical device by comparing the diagnostic parameter with a predefined threshold value.

17. A non-transitory computer readable medium encoded with a program to instruct a controller based device to:

receive a measured electrical signal from an electrical device of an electromechanical device;

receive a measured vibration signal from a mechanical device of the electromechanical device, coupled to the electrical device;

determine a first signal signature based on the measured electrical signal;

determine a second signal signature based on the measured vibration signal;

determine a diagnostic parameter based on the first signal signature and the second signal signature; and

determine a fault of the mechanical device based on the diagnostic parameter.