基于组合算法的水下地形匹配技术  

Underwater terrain matching technology based on combined algorithm

作　　者：龙涛 王虎彪 边少锋[2] 纪兵[2] LONG Tao;WANG Hubiao;BIAN Shaofeng;JI Bing(Innovation Academy for Precision Measurement Science and Technology,Wuhan 430077,China;Department of Navigation,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]中国科学院精密测量科学与技术创新研究院大地测量与地球动力学国家重点实验室,湖北武汉430077 [2]海军工程大学导航工程系,湖北武汉430033

出　　处：《海洋测绘》2021年第3期24-27,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41874091;42074093)。

摘　　要：利用地形信息辅助惯性系统导航,能有效地约束误差的累积,匹配算法作为地形辅助导航的核心,不同的算法在匹配精度和时间上各有特点。为了改善单一算法的缺陷,以水下地形辅助导航应用为背景,根据这些算法的特性,提出了一种将TERCOM算法和SITAN算法进行组合的方案,综合了两种算法的特性,引入可靠性比值,并在地形条件差异较大的两个代表区域进行匹配,仿真结果验证了算法的有效性。Using terrain information to assist inertial system navigation can effectively restrain the accumulation of errors.The matching algorithm is the core of terrain assisted navigation.Different algorithms have their own characteristics in matching accuracy and time.In order to improve the shortcomings of a single algorithm, this article takes the application of underwater terrain assisted navigation as the background.According to the characteristics of these algorithms, a scheme is proposed that combines the TERCOM algorithm and the SITAN algorithm, which combines the characteristics of the two algorithms and their reliability.The simulation results verify the effectiveness of the algorithm.

关 键 词：地形辅助导航 海底地形 TERCOM算法 SITAN算法 联合匹配 

分 类 号：P229[天文地球—大地测量学与测量工程]