Landing motion control of an underwater glider for ocean floor resources exploration

Satoru Yamaguchi, Hirofumi Sumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ocean floor resources such as sea-floor hydrothermal deposit, methane hydrate and manganese nodule are promising resources for future ocean development. It is becoming apparent by recent research that certain amount of these resources deposit also near Japan. Though several kinds of exploration methods such as seismic exploration, a multi-beam echo sounder and a sub-bottom profiler which are equipped with a survey ship are used for the resource explorations in general, these exploration methods need a large amount of cost and efforts. On the other hand, an autonomous underwater glider which equips an OBEM (Ocean Bottom Electromagnetometer) which has been developed in the author’s laboratory is a hopeful instrument for the ocean floor resources explorations. The autonomous vehicle has an ability to achieve a continuous resource exploration autonomously for a long term. The buoyancy and attitude control mechanism enable the vehicle to move to the next measurement point by gliding. The landing point for the measurement must be precisely controlled by the motion control system because the vehicle measures the slight variation of electromagnet wave on the sea bottom. The performance in a landing stage is essential for the motion control of the vehicle. Here, the motion control system of a weight shift device in the vehicle’s pressure container is developed for a landing stage. The authors attempt to make clear the performance of the controller in this report. Moreover, the characteristics of a buoyancy control device is examined by tank experiments. This unit is used to raise the vehicle to an appropriate height for the next gliding.

Original languageEnglish
Title of host publicationProceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019
EditorsJin S. Chung, Odd M. Akselsen, HyunWoo Jin, Hiroyasu Kawai, Yongwon Lee, Dmitri Matskevitch, Suak Ho Van, Decheng Wan, Alan M. Wang, Satoru Yamaguchi
PublisherInternational Society of Offshore and Polar Engineers
Pages1616-1621
Number of pages6
ISBN (Print)9781880653852
Publication statusPublished - Jan 1 2019
Event29th International Ocean and Polar Engineering Conference, ISOPE 2019 - Honolulu, United States
Duration: Jun 16 2019Jun 21 2019

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume1
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Conference

Conference29th International Ocean and Polar Engineering Conference, ISOPE 2019
CountryUnited States
CityHonolulu
Period6/16/196/21/19

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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  • Cite this

    Yamaguchi, S., & Sumoto, H. (2019). Landing motion control of an underwater glider for ocean floor resources exploration. In J. S. Chung, O. M. Akselsen, H. Jin, H. Kawai, Y. Lee, D. Matskevitch, S. Ho Van, D. Wan, A. M. Wang, & S. Yamaguchi (Eds.), Proceedings of the 29th International Ocean and Polar Engineering Conference, ISOPE 2019 (pp. 1616-1621). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 1). International Society of Offshore and Polar Engineers.