SYSTEMS AND METHODS FOR PREDICTIVE HEALTH MONITORING OF GYROSCOPES AND ACCELEROMETERS

• US 20160054128A1
• Filed: 08/25/2014
• Published: 02/25/2016
• Est. Priority Date: 08/25/2014
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Touchberry, Alan Bruce
• Granted Patent: US 10,240,928 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01C 21/10 by using measurements of speed or acceleration G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01C 25/005 initial alignment, calibration or starting-up of inertial devices

Abstract

Systems and methods for predictive health monitoring of gyroscopes and accelerometers are provided. In one embodiment, a system comprises: a plurality of navigation devices each comprising at least one gyroscope or accelerometer and at least one predictive health monitoring module, wherein the at least one predictive health monitoring module collects diagnostic parameters from the at least one gyroscope or accelerometer; and at least one server communicatively coupled to the plurality of navigation devices, the at least one server configured to receive the collected data from the plurality of navigation devices and analyze the collected data from the plurality of navigation devices to determine a service prognosis.

Claims

1. A server comprising:

a port configured to receive collected data from a plurality of navigation devices that includes at least one gyroscope or accelerometer and that each further includes at least one predictive health monitoring module that monitors diagnostic parameters correlated to the at least one gyroscope or accelerometer, wherein the collected data from the plurality of navigation devices comprises a plurality of diagnostic parameters obtained from the predictive health monitoring module of the at least one gyroscope or accelerometer;

a memory, the memory configured to store the collected data from the plurality of navigation devices; and

a processing device communicatively coupled to the memory, wherein the processing device is configured to analyze the collected data from the plurality of navigation devices to determine a service prognosis for the at least one gyroscope or accelerometer.

2. The server of claim 1, wherein the service prognosis includes a prediction of an expected end of life for the at least one gyroscope or accelerometer.

3. The server of claim 1, wherein the service prognosis is further refined when the server receives additional collected data.

4. The server of claim 1, wherein the service prognosis is determined based on one or more initial conditions.

5. The server of claim 1, wherein the plurality of diagnostic parameters are taken by a plurality of monitors that include at least one of the following:

laser intensity monitor, tube voltage monitor, readout intensity monitor, operating temperature monitor, path length control monitor, random drift improvement monitor, dither drive monitor, dither stripper gain monitor, dither stripper phase monitor, optical power monitor, power supply current monitor, motor bias monitor, automatic gain control monitor, system generated estimate of gyroscope bias monitor, and system generated estimate of gyroscope scale factor monitor.

6. The server of claim 1, wherein the plurality of diagnostic parameters include statistical compilations of raw data taken by a plurality of monitors.

7. A method comprising:

using a predictive health monitor within a first navigation device that includes at least one gyroscope or accelerometer, collect a plurality of diagnostic parameters correlated to the at least one gyroscope or accelerometer;

receiving collected data from a plurality of navigation devices that includes the first navigation device, wherein the collected data comprises the plurality of diagnostic parameters correlated to the at least one gyroscope or accelerometer; and

analyzing the collected data from the plurality of navigation devices to determine a service prognosis for the at least one gyroscope or accelerometer.

8. The method of claim 7, wherein analyzing the collected data further comprises:

predicting an end of life of the at least one gyroscope or accelerometer.

9. The method of claim 7, further comprising refining the service prognosis when there is additional collected data from a plurality of navigation devices.

10. The method of claim 7, wherein analyzing the collected data further comprises:

determining the service prognosis based on one or more initial conditions associated with the at least one gyroscope or accelerometer.

11. The method of claim 7, wherein the plurality of diagnostic parameters are obtained by a plurality of monitors that include at least one of the following:

laser intensity monitor, tube voltage monitor, readout intensity monitor, operating temperature monitor, path length control monitor, random drift improvement monitor, dither drive monitor, dither stripper gain monitor, dither stripper phase monitor, optical power monitor, power supply current monitor, motor bias monitor, automatic gain control monitor, system generated estimate of gyroscope bias monitor, and system generated estimate of gyroscope scale factor monitor.

12. The method of claim 7, wherein the plurality of diagnostic parameters include statistical compilations of raw data taken by a plurality of monitors.

13. A system comprising:

a plurality of navigation devices each comprising at least one gyroscope or accelerometer and wherein each of the plurality of navigation devices further comprises at least one predictive health monitoring module that monitors diagnostic parameters correlated to the at least one gyroscope or accelerometer; and

at least one server communicatively coupled to the plurality of navigation devices, the at least one server configured to receive collected data comprising the diagnostic parameters from the plurality of navigation devices and analyze the collected data from the plurality of navigation devices to determine a service prognosis for the at least one gyroscope or accelerometer.

14. The system of claim 13, wherein the service prognosis includes a prediction of an expected end of life for the at least one gyroscope or accelerometer.

15. The system of claim 13, wherein the server refines the service prognosis when the server receives additional collected data.

16. The server of claim 13, wherein the service prognosis is determined based on one or more initial conditions.

17. The system of claim 13, wherein the plurality of diagnostic parameters are taken by a plurality of monitors that include at least one of the following:

laser intensity monitor, tube voltage monitor, readout intensity monitor, operating temperature monitor, path length control monitor, random drift improvement monitor, dither drive monitor, dither stripper gain monitor, dither stripper phase monitor, optical power monitor, power supply current monitor, motor bias monitor, automatic gain control monitor, system generated estimate of gyroscope bias monitor, and system generated estimate of gyroscope scale factor monitor.

18. The system of claim 13, wherein the plurality of diagnostic parameters include statistical compilations of raw data taken by a plurality of monitors.

19. The system of claim 13, wherein the server receives the collected data from the plurality of navigation devices continuously.

20. The system of claim 13, wherein the server receives the collected data from the plurality of navigation devices at specified intervals.