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Conceptual Design of Navigation of an AUV for Monitoring CCS Site at Deep Sea Bottom

[+] Author Affiliations
Yoshitaka Watanabe, Hiroshi Yoshida, Hiroshi Ochi, Tadahiro Hyakudome, Shojiro Ishibashi, Yoshiyuki Nakano, Shinobu Omika, Masami Matsuura

Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan

Paper No. OMAE2011-49812, pp. 121-128; 8 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 5: Ocean Space Utilization; Ocean Renewable Energy
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4437-3
  • Copyright © 2011 by ASME


We, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), are developing an autonomous underwater vehicle (AUV) whose main mission is monitoring a site at the sea bottom for the carbon dioxide capture and storage (CCS). The AUV cruises very near the sea bottom, and is equipped with chemical sensors in order to detect escape of CO2 from sub-bottom. Of course, the position information of the AUV is critical information for the monitoring. In this paper, a conceptual design of navigation of the AUV is described. Recently, navigation of AUV is implemented by integrating multiple navigation devices including inertial navigation system (INS), Doppler velocity log (DVL), depth sensor, acoustic navigation system, and others. The AUV under construction will be equipped with these navigation sensors, and will integrate those sensors’ outputs to navigate herself. In order to measure the absolute position of the AUV the acoustic method is one of fundamental technique. At the first step of development of the AUV, three acoustic methods are considered to adopt. The three methods are super short baseline (SSBL) method which is a tracking from support ship or other surface station, long baseline (LBL) which is navigation based on preplaced acoustic transponders, and virtual LBL (VLBL) which is navigation based on only single transponder. These acoustic methods are integrated with the navigation result of INS, depth sensor, and DVL. The three methods are used in each appropriate case. Which feature of observation is desired simplicity, accuracy, or independence from support ship and time efficiency? The acoustic method is influenced by environment, and also output of other sensors is depending on the environment, for example the DVL miss the data when the terrain is with many up-hills and down-hills. The integration or filtering parameters of the navigation should be adjusted depending on the influential environmental factor.

Copyright © 2011 by ASME



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