VEHICLE MODEL CALIBRATION SYSTEM FOR A MOBILE MACHINE

• US 20130173109A1
• Filed: 12/28/2011
• Published: 07/04/2013
• Est. Priority Date: 12/28/2011
• Status: Abandoned Application

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Hukkeri, Ramadev Burigsay, Taylor, Michael Allen
• Application Number:
  US13/338,859
• Publication Number:
  US 20130173109A1
• Time in Patent Office: Days
• US Class Current: 701/23
• CPC Class Codes: E02F 9/264 Sensors and their calibration for indicating the position of the work tool
• CPC Class Codes: G05D 1/0891 specially adapted for land vehicles

Abstract

A method is disclosed for recalibrating a vehicle model used to autonomously control a machine on a worksite, with a calibration system including at least one processor. In the method at least one recalibration condition is determined for which recalibration of the vehicle model is to occur. Time information, location information, and testing condition information are determined for the at least one recalibration condition. The time information includes a determination of a time when recalibration is to be performed. The location information includes a determination of a location suitable for performing the recalibration. The testing condition information includes a determination of a testing condition to be used during the recalibration.

Claims

1. A method of recalibrating a vehicle model used to autonomously control a machine on a worksite, with a calibration system including at least one processor, the method comprising:

determining at least one recalibration condition for which recalibration of the vehicle model is to occur;

determining time information for the at least one recalibration condition, the time information including a determination of a time when recalibration is to be performed;

determining location information for the at least one recalibration condition, the location information including a determination of a location suitable for performing the recalibration; and

determining testing condition information for the at least one recalibration condition, the testing condition information including a determination of a testing condition to be used during the recalibration.

2. The method according to claim 1, wherein determining the at least one recalibration condition includes detecting an acceleration of the machine above a threshold amount, and determining the at least one calibration condition based on the detected acceleration.

3. The method according to claim 1, wherein determining the at least one recalibration condition includes detecting wear of the machine above a threshold amount, and determining the at least one recalibration condition based on the detected wear.

4. The method according to claim 3, where the wear of the machine is detected by a sensor on the machine.

5. The method according to claim 3, wherein the wear of the machine is detected by manual inspection of the machine.

6. The method according to claim 1, wherein determining the time information further includes determining a consequence of not completing the recalibration during a specified time period.

7. The method according to claim 1, wherein determining the location information further includes determining whether the location suitable for performing the recalibration exists on the worksite.

8. The method according to claim 7, wherein determining the location information further includes directing another vehicle to create the location suitable for performing the recalibration.

9. The method according to claim 1, wherein determining the testing condition information includes determining at least one testing condition of the machine that is to remain constant and determining at least one testing condition of the machine that is to be varied during the recalibration.

10. The method according to claim 1, wherein determining the at least one recalibration condition includes determining the at least one recalibration condition with a worksite management system or a controller on the machine.

11. A method of calibrating a vehicle model used to autonomously control a machine on a worksite, with a calibration system including at least one processor, the method comprising:

performing an initial calibration of the vehicle model by;

autonomously controlling a machine, based on the vehicle model, to perform an operation at a worksite;

during performance of the operation, determining at least one condition for which the vehicle model is to be calibrated;

determining machine performance of the operation during the at least one condition; and

adjusting the vehicle model based on the determined machine performance; and

recalibrating the vehicle model subsequent to the initial calibration by;

determining at least one recalibration condition for which recalibration of the vehicle model is to occur;

determining time information for the at least one recalibration condition, the time information including a determination of a time when recalibration is to be performed;

determining location information for the at least one recalibration condition, the location information including a determination of a location suitable for performing the recalibration;

determining testing condition information for the at least one recalibration condition, the testing condition information including a determination of a testing condition to be used during the recalibration; and

adjusting the initially-calibrated vehicle model for the recalibration condition based on the time information, the location information, and the testing condition information.

12. The method according to claim 11, wherein determining the at least one recalibration condition includes detecting an acceleration of the machine above a threshold amount, and determining the at least one calibration condition based on the detected acceleration.

13. The method according to claim 11, wherein determining the at least one recalibration condition includes detecting wear of the machine above a threshold amount, and determining the at least one recalibration condition based on the detected wear.

14. The method according to claim 13, where the wear of the machine is detected by a sensor on the machine.

15. The method according to claim 13, wherein the wear of the machine is detected by manual inspection of the machine.

16. The method according to claim 11, wherein determining the time information further includes determining a consequence of not completing the recalibration during a specified time period.

17. The method according to claim 11, wherein determining the location information further includes determining whether the location suitable for performing the recalibration exists on the worksite.

18. The method according to claim 17, wherein determining the location information further includes directing another vehicle to create the location suitable for performing the recalibration.

19. The method according to claim 11, wherein determining the testing condition information includes determining at least one testing condition of the machine that is to remain constant and determining at least one testing condition of the machine that is to be varied during the recalibration.

20. The method according to claim 11, wherein determining the at least one recalibration condition includes determining the at least one recalibration condition with a worksite management system or a controller on the machine.