Fixed interval background auto-alignment for closed loop interferometric fiber optic gyroscopes
US5953123A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Dec 31, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/726
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This invention relates to an improved method and mechanism by which to align closed loop interferometric fiber optic gyroscopes. Such method and means includes aligning the gyroscope periodically at fixed time intervals; providing multiplexed control of the gyroscope's internal phase rebalance control loop and gain scaling control loop, enabling one or the other, but never both simultaneously, and thereby eliminate acceleration-dependent errors; eliminating the 1 LSB phase discontinuity produced during each roll-over in the gyroscope by adding an offset to the output ramp produced by said serrodyne ramp generator; and providing a means and method to align the phase-rebalance loop gain for each production unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.