Aircraft navigation using the global positioning system and an attitude and heading reference system
US8082099B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Apr 25, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/018
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A vehicle navigation technique uses a receiver for signals of a global positioning system to produce a first position indication and a first velocity indication. An attitude and heading reference system employs accelerometers and gyroscopes oriented along three axes. The raw signals from the accelerometers and gyroscopes are used to derive a second position indication and a second velocity value. A Kalman filter function is applied to the first and second position indications and to the first and second velocity indications to thereby produce a present position indication and a present velocity indication. The Kalman filter function exploits GPS data to corrects periodic drift in the position and velocity indications derived form the accelerometers and gyroscopes by calculating accelerometer and gyroscope biases, thereby enabling relatively inexpensive devices to be utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.