Abstract
A highly accurate positioning and orientation technique based on four-cluster fibre optic gyros (FOGs) is presented. The four-cluster FOG inertial measurement unit (IMU) comprises three low-precision FOGs, one static high-precision FOG and three accelerometers. To realize high-precision positioning and orientation, the static alignment (north-seeking) before vehicle manoeuvre was divided into a low-precision self-alignment phase and a high-precision north-seeking (online calibration) phase. The high-precision FOG measurement information was introduced to obtain high-precision azimuth alignment (north-seeking) result and achieve online calibration of the low-precision three-cluster FOG. The results of semi-physical simulation were presented to validate the availability and utility of the highly accurate positioning and orientation technique based on the four-cluster FOGs.
| Original language | English |
|---|---|
| Article number | 045004 |
| Journal | Measurement Science and Technology |
| Volume | 24 |
| Issue number | 4 |
| DOIs | |
| State | Published - Apr 2013 |
Keywords
- fibre optic gyro (FOG)
- ground-based missile
- high-precision north-seeking
- mobile launching
- online calibration
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