Systems and methods for predictive health monitoring of gyroscopes and accelerometers

• US 10,240,928 B2
• Filed: 08/25/2014
• Issued: 03/26/2019
• Est. Priority Date: 08/25/2014
• Status: Active Grant

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Touchberry, Alan Bruce
• Primary Examiner(s): Elchanti, Hussein
• Assistant Examiner(s): Castro, Paul A
• Application Number:
  US14/467,149
• Publication Number:
  US 20160054128A1
• Time in Patent Office: 1,674 Days
• 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 system comprising:

a plurality of navigation devices; and

a server;

wherein the plurality of navigation devices each include at least one gyroscope or accelerometer, and each further includes at least one predictive health monitoring module that takes measurements of, and tracks, diagnostic parameters for the plurality of navigation devices and correlates the diagnostic parameters to the at least one gyroscope or accelerometer;

wherein the server includes;

a port that receives the diagnostic parameters from the predictive health monitoring module;

a memory that stores the diagnostic parameters; and

a processing device communicatively coupled to the memory, wherein the processing device analyzes the diagnostic parameters to

determine a service prognosis for the at least one gyroscope or accelerometer;

wherein the processing device determines the service prognosis by correlating collected data measured from at least one gyroscope or accelerometer that has since failed with collected data from at least one healthy gyroscope or accelerometer to provide an expected end of life prediction for the least one gyroscope or accelerometer of the plurality of navigation devices; and

wherein the processing device outputs a notification to a maintenance system, the notification including information in the service prognosis, to generate a maintenance action for the at least one gyroscope or accelerometer.

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

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

4. The system 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.

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

6. 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;

wherein analyzing the collected data comprises correlating the collected data measured from at least one gyroscope or accelerometer that has since failed with collected data from at least one healthy gyroscope or accelerometer to provide an expected end of life prediction for the least one gyroscope or accelerometer; and

outputting a notification to a maintenance system, the notification including information in the service prognosis, to generate a maintenance action for the at least one gyroscope or accelerometer.

7. The method of claim 6, further comprising refining the service prognosis when there is additional collected data from a plurality of navigation devices.

8. The method of claim 6, 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.

9. The method of claim 6, 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.

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

11. 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;

wherein the at least one server determines the service prognosis by correlating collected data measured from at least one gyroscope or accelerometer that has since failed with collected data from at least one healthy gyroscope or accelerometer to provide an expected end of life prediction for the least one gyroscope or accelerometer.

12. The system of claim 11, wherein the server refines the service prognosis when the server receives additional collected data.

13. The server of claim 11, wherein the service prognosis is determined based on one or more initial conditions.

14. The system of claim 11, 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.

15. The system of claim 11, wherein the plurality of diagnostic parameters include statistical compilations of raw data taken by a plurality of monitors.

16. The system of claim 11, wherein the server receives the collected data from the plurality of navigation devices continuously.

17. The system of claim 11, wherein the server receives the collected data from the plurality of navigation devices at specified intervals.