Fast Extraction of Local Underwater Terrain Features for Underwater Terrain-Aided Navigation  

水下地形辅助导航中局部地形特征的快速提取方法（英文）

作　　者：Pengyun Chen Pengfei Zhang Jianlong Chang Peng Shen 陈鹏云;张鹏飞;常建龙;沈鹏(College of Mechatronic Engineering,North University of China,Taiyuan 030051,China;National Deep Sea Center,Qingdao 266237,China)

机构地区：[1]College of Mechatronic Engineering,North University of China,Taiyuan 030051,China [2]National Deep Sea Center,Qingdao 266237,China

出　　处：《Journal of Marine Science and Application》2019年第3期334-342,共9页船舶与海洋工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.51775518);Natural Science Foundation of North University of China(Grant No.2017001);the 333 Academic Start Funding for Talents of North University of China(Grant No.13011915)

摘　　要：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.

关 键 词：UNDERWATER TERRAIN modeling BEAM selection MIXING RESOLUTION TERRAIN storage model Index EXTRACTION 

分 类 号：U675.7[交通运输工程—船舶及航道工程]