Design of artificial landmarks for underwater simultaneous localisation and mapping

Design of artificial landmarks for underwater simultaneous localisation and mapping
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水下同步定位与建图人工地标设计

DOI:
10.1049/iet-rsn.2011.0103
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发表时间:
2013
期刊:
IET Radar, Sonar & Navigation
影响因子:
--
通讯作者:
Pailhas Y
Pailhas Y
中科院分区:
--
文献类型:
--
作者:
Pailhas Y

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自动水下航行器用于各种目的的使用在未来将增加。一个关键问题是精确导航,特别是对于测量应用,各种位置传感器引入了大的累积误差:加速度计;多普勒测速仪;罗盘;惯性导航传感器。同步定位和地图绘制等算法依赖于准确的地标识别,以便校正车辆位置。本研究提出了一种基于宽带声纳和被动人工编码地标的解决方案,以改善导航。通过对多层同心球中声传播波动方程的求解,表明在内部结构变化很小的情况下,回波频谱有很大的差异。这使得一组被动地标的设计,可以明确地识别,因为每个具有特征签名或频谱代码时,用宽带声纳声穿透。
The use of autonomous underwater vehicles for a variety of purposes is set to increase in the future. A key issue is accurate navigation, especially for survey applications large cumulative error are introduced by the various position sensors: accelerometer; Doppler velocity log; compass; inertial navigation sensors. Algorithms such as simultaneous localisation and mapping rely on accurate landmark recognition in order to correct the vehicle position. This study proposes a solution based on broadband sonar and passive artificial coded landmarks to improve the navigation. Through resolution of the wave equation for acoustic propagation in a multilayer concentric sphere, it is shown that there is a great diversity in the echo spectrum with only small changes in internal structure. This enables the design of a set of passive landmarks, which can be identified unambiguously, since each has a characteristic signature or spectral code when insonified with a broadband sonar.
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