Towed target positioning technology based on long baseline and ultra-short baseline combination
<b>[Objectives]</b> This research aims to obtain accurate positioning in underwater towing and facilitate its use and deployment during experiments.<b>[Methods]</b> Long baseline and ultra-short baseline acoustic technology are combined,the rough position of a towed target is...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Editorial Office of Chinese Journal of Ship Research
2019-01-01
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| Series: | Zhongguo Jianchuan Yanjiu |
| Subjects: | |
| Online Access: | http://www.ship-research.com/EN/Y2019/V14/I1/156 |
| Summary: | <b>[Objectives]</b> This research aims to obtain accurate positioning in underwater towing and facilitate its use and deployment during experiments.<b>[Methods]</b> Long baseline and ultra-short baseline acoustic technology are combined,the rough position of a towed target is obtained using the ultra-short baseline positioning array and the position is used as a priori data for long baseline positioning. On this basis,the long baseline array elements of the deck unit transducer and ultra-short baseline positioning array are combined with the short-term baseline positioning a priori data and long baseline positioning technology so as to obtain higher positioning accuracy.<b>[Results]</b> The long-baseline and ultra-short baseline joint positioning method is used to improve the positioning accuracy of towed underwater targets. The results of positioning accuracy tests conducted on a lake show that the Root-Mean-Square(RMS) error is 6.8 m when the ultra-short baseline method is adopted. However,the RMS value is just 2.5 m when the long baseline and ultra-short baseline are combined,solving the problem of positioning accuracy within short distances.<b>[Conclusions]</b> By combining the long-range baseline information of the deck unit's ranging information and the ultra-short baseline positioning results,this technology can achieve the high-precision positioning of towed underwater targets and provide technical support for the specific needs of offshore testing and operations. |
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| ISSN: | 1673-3185 1673-3185 |