USE OF PARTIAL COMPONENT FAILURE DATA FOR INTEGRATED FAILURE MODE SEPARATION AND FAILURE PREDICTION

• US 20150066431A1
• Filed: 08/27/2013
• Published: 03/05/2015
• Est. Priority Date: 08/27/2013
• Status: Abandoned Application

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Zheng, Yibin, Tu, Fang
• Application Number:
  US14/011,420
• Publication Number:
  US 20150066431A1
• Time in Patent Office: Days
• US Class Current: 702/183
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61B 6/586 Detection of faults or malfunction of the device

Abstract

Use of a failure model is disclosed which can be used to probabilistically evaluate possible failure modes in the event of failure of a complex component when no forensic analysis of the failed component is performed. When component failures do occur, contemporaneous sensor and operation data may be used to update and refine the failure model, whether a forensic analysis of the failed component is performed or not. Further, when no component failure is reported, the contemporaneous sensor and operation data may be used to predict component failures.

Claims

1. A computer-implemented method for processing failure events, comprising the acts of:

acquiring, at a data collection system, sensed parameter measurements over time from a plurality of devices remote from the data collection system;

determining, via execution of a processor-executed routine, whether a failure event for a component of interest within the plurality of devices has been received into an accessible data store, wherein the failure event may or may not include a mode of failure for the respective component;

if the failure event has been reported and a mode of failure is indicated, updating a failure model based on the indicated mode of failure and a set of contemporaneous sensed parameters for the respective device;

if the failure event has been reported and the mode of failure is not indicated, updating the failure model based on a probabilistic assignment of possible modes of failure and the set of contemporaneous sensed parameters for the respective device; and

storing the updated failure model for subsequent use or updates.

2. The computer-implemented method of claim 1, wherein the sensed parameter measurements are a subset of a larger set of sensed measurements acquired from the plurality of devices.

3. The computer-implemented method of claim 1, wherein the probabilistic assignment of possible modes of failure is determined based upon the set of contemporaneous sensed parameters and the failure model.

4. The computer-implemented method of claim 1, further comprising iteratively updating the probabilistic assignment of possible modes of failure and the failure model until a stable solution is attained.

5. The computer-implemented method of claim 1, further comprising:

if the failure event has not been reported, deriving a probability of failure for each mode of failure for a respective component using the set of contemporaneous sensed parameters and the failure model.

6. The computer-implemented method of claim 5, further comprising:

determining whether one or more of the probabilities exceeds a specified threshold; and

displaying an alert if the specified threshold is exceeded.

7. The computer-implemented method of claim 1, wherein the component of interest comprises a field replaceable unit.

8. The computer-implemented method of claim 1, wherein the failure model comprises:

a set of probabilities associated with each mode of failure; and

a set of sensed parameters associated with each mode of failure.

9. A failure analysis system, comprising:

a data collection server configured to acquire sensor and operational data from one or more remote devices that comprise a component of interest;

a database configured to store failure events records for the component, wherein a plurality of the failure event records do not include an associated failure mode;

a failure model for the component comprising probabilities associated with a plurality of failure modes and parameters associated with the plurality of failure modes;

a feature extraction module configured to parse the acquired sensor and operational data to generate feature vectors comprised of subsets of the sensor and operational data; and

a control module configured to, upon entry of a failure event for a respective component to the database;

update the parameters associated with a respective failure mode within the failure model using a contemporaneous feature vector if the failure event includes indicated the respective failure mode was known for the failure event; and

update the parameters associated with each failure mode within the failure model using a contemporaneous feature vector and based on respective probabilities determined for each failure mode if the failure event does not include an indication of the failure mode.

10. The failure analysis system of claim 9, wherein the probabilities determined for each failure mode are determined using the contemporaneous feature vector and the failure model.

11. The failure analysis system of claim 9, wherein the control module, if no failure event is entered, is further configured to derive a probability of failure for each failure mode for one or more of the components using the contemporaneous feature vector and the failure model.

12. The failure analysis system of claim 11, wherein the control module:

compares the derived probabilities of failure to one or more respective thresholds; and

if the threshold is exceeded, generates an alert.

13. The failure analysis system of claim 9, wherein the control module iteratively updates the respective probabilities and the failure model until self-consistent.

14. The failure analysis system of claim 9, wherein the data collection server, the database, the failure model, the feature extraction module, and the control module are implemented on one or more processor-based systems.

15. The failure analysis system of claim 9, wherein the component of interest comprises a field replaceable unit of the remote devices.

16. A non-transitory, computer-readable medium storing one or more instructions executable by a processor of an electronic device, the instructions, when executed, performing acts comprising:

determining whether an X-ray tube failure has been reported within one of a plurality of monitored X-ray based imaging systems;

if the X-ray tube failure has been reported and a cause of X-ray tube failure is indicated, updating an X-ray tube failure model based on the indicated cause of failure and on a set of sensed parameters acquired for the respective X-ray tube contemporaneous with the X-ray tube failure;

if the X-ray tube failure has been reported and the cause of X-ray tube failure is not indicated, updating the X-ray tube failure model based on a probabilistic assignment of possible causes of failure and on the set of sensed parameters; and

storing the updated X-ray tube failure model for subsequent use or updates.

17. The non-transitory, computer readable medium of claim 16, wherein the set of sensed parameters acquired for the respective X-ray tube contemporaneous with the X-ray tube failure are a subset of a larger set of sensed measurements.

18. The non-transitory, computer readable medium of claim 16, wherein the probabilistic assignment of possible causes of failure is determined based upon the set of sensed parameters and the X-ray tube failure model.

19. The non-transitory, computer readable medium of claim 16, wherein the instructions, when executed, performing further acts comprising:

iteratively updating the probabilistic assignment of possible causes of failure and the X-ray tube failure model until a stable solution is attained.

20. The non-transitory, computer readable medium of claim 16, wherein the instructions, when executed, performing further acts comprising:

if the X-ray tube failure event has not been reported, deriving a probability of X-ray tube failure for each cause of failure for component respective X-ray tube using the set of sensed parameters and the X-ray tube failure model; and

generating an alert if the one or more of the probabilities exceeds a specified threshold.