Method for the autonomous calibration of an inertial rig used in static mode
US9534926B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 2014 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Jun 2, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P21/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for the autocalibration of an inertial rig comprising an inertial core defining a sensor reference frame, implemented in the course of at least two missions (Mn, Mn+1) each comprising the determination, on the basis of measurements of gyroscopes, of the orientation of the rig in a reference frame comprising the north axis (N) and the vertical axis (Up), the method comprising the implementation:—in the course of a mission (Mn), of an estimation (200) of drift errors of the gyroscopes for the orientation of the rig at least with respect to the north axis (dgyrN); and—in the course of a following mission (Mn+1), of a calculation (400) of corrections of drift errors (DXn) of the sensor reference frame (X,Y,Z), on the basis of the estimated drift errors; and—of a calculation (600) of drift errors (Xn+1), consisting in correcting drift errors (Xn) of the sensor reference frame that were calculated during the previous mission (Mn).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.