ecoSUB Robotics System / Package
Network Localisation & Advanced Navigation
Acoustic nano-modem network that lets ecoSUB AUVs localise underwater against GPS-referenced surface nodes, to +/- 5-10 m accuracy.
Description
Network Localisation uses surface nodes that hold a GPS position and broadcast it by underwater acoustic modem when pinged. Underwater vehicles calculate range to each node, triangulate their position and fuse it with dead reckoning. Surface nodes can be ecoSUB AUVs or HERMES C3 / C3 OEM units on fixed structures, vessels or USVs. Development was funded by Innovate UK in 2018 with NOC and the University of Newcastle.
Key features
- Accuracy +/- 5-10 m regardless of distance travelled
- Compared with about +/- 10% of distance travelled for dead reckoning alone
- Acoustic nano-modem ranging and triangulation fused with dead reckoning
- Surface nodes: ecoSUB AUVs or HERMES C3 / C3 OEM units
- A minimum of three nodes suggested
Applications
- Geo-referenced AUV survey data
- Multi-vehicle operations
Specifications
| Navigation accuracy | +/- 5-10 m regardless of distance travelled |
|---|---|
| Minimum surface nodes (suggested) | 3 |
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