Abstract
Considering the two characteristics: (1) simultaneous localization and mapping (SLAM) is a popular algorithm for autonomous underwater robot, but visual SLAM is significantly influenced by weak illumination; (2) geomagnetism-aided navigation and gravity-aided navigation are equally important methods in the field of robot navigation, but both are affected heavily by time-varying noises and terrain fluctuations; however, gravity gradient vector can avoid the influence of time-varying noises, and is less affected by terrain fluctuations. To the end, we proposes a UKF-SLAM based gravity gradient aided navigation in this paper with the following advantages: (1) the UKF-SLAM is an efficient way to avoid linearization errors compared with the EKF-SLAM; (2) it improves the accuracy of navigation system without the help of any geophysical reference map; (3) it is suitable for a robot to navigate itself under the environment of weak illumination and time-varying disturbances. Experimental results also show that our proposed method has a less localization error than the SLAM-based geomagnetic aided navigation.
| Original language | English |
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| Title of host publication | Intelligent Robotics and Applications: 7th International Conference, ICIRA 2014, Guangzhou, China, December 17-20, 2014, Proceedings, Part I |
| Publisher | Springer |
| Pages | 77-88 |
| ISBN (Print) | 9783319139654 |
| Publication status | Published - 3 Dec 2014 |