期刊
JOURNAL OF MARINE SCIENCE AND APPLICATION
卷 18, 期 3, 页码 334-342出版社
HARBIN ENGINEERING UNIV
DOI: 10.1007/s11804-019-00086-6
关键词
Underwater terrain modeling; Beam selection; Mixing resolution; Terrain storage model; Index extraction
资金
- National Natural Science Foundation of China [51775518]
- Natural Science Foundation of North University of China [2017001]
- 333 Academic Start Funding for Talents of North University of China [13011915]
Terrain matching accuracy and real-time performance are affected by local underwater terrain features and structure of matching surface. To solve the extraction problem of local terrain features for underwater terrain-aided navigation (UTAN), real-time data model and selection method of beams are proposed. Then, an improved structure of terrain storage is constructed, and a fast interpolation strategy based on index is proposed, which can greatly improve the terrain interpolation-reconstruction speed. Finally, for the influences of tide, an elimination method of reference depth deviation is proposed, which can reduce the reference depth errors caused by tidal changes. As the simulation test shows, the proposed method can meet the requirements of real-time performance and effectiveness. Furthermore, the extraction time is considerably reduced, which makes the method suitable for the extraction of local terrain features for UTAN.
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