Navigation system initialization with inertial data compensation
US9140558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 2011 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Nov 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An example embodiment includes a method for initializing a navigation system. The method includes receiving inertial measurement data from an inertial measurement unit over time and storing the inertial measurement data in a buffer with an indication of a time of validity for the inertial measurement data. The method also includes receiving navigation data from an aiding source, the navigation data having a time of validity, and initializing a navigation solution with the navigation data. The method also includes summing inertial measurement data from the buffer to produce an inertial motion estimate for a time increment after the time of validity of the navigation data, applying at least one of coning or sculling compensation to the inertial motion estimate to produce a compensated inertial motion estimate, and propagating the navigation solution forward based on the compensated inertial motion estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.