Gyro drift cancelation
US9074888B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Oct 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods, devices, and systems are presented for compensating for gyroscopic drift in a stabilized gimbal system mounted on a vehicle. When the vehicle is parked and the gimbal is not being commanded to move by an operator, encoders or resolvers of the gimbal stabilized system are read and periodically read thereafter. When the vehicle begins to move or the gimbal is commanded to move, the last periodic reading of the resolvers is used to determine the amount that the gimbal has moved during the rest period. A gyroscopic drift rate is computed by dividing the amount of angular movement by the time period between the readings, and the gyroscopic drift rate is used for corrections while the vehicle is moving or gimbal is commanded to move. Each time the vehicle stops, the gyroscopic drift rate is re-computed and updated. The gyroscope can be heated until the drift rate is constant with respect to temperature, further helping the calibration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.