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Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation

Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation
Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation

The autonomous underwater vehicle has proven to be an important tool for study of the seafloor. Detailed seafloor analysis often requires wide area observations with high resolution information. Certain sensors require close proximity to the seafloor or contact, with stable footing to perform integrated measurements over a period of time. Such wide area high resolution surveys cannot be performed by a cruising or hovering type vehicle alone. In this research the authors propose a new class of AUV along with a survey technique in which an underwater vehicle can generate meter order resolution wide area maps of the seafloor, but at intermediate locations, obtain higher, centimeter order resolution information by lowering scanning speed and altitude and finally, by landing to obtain micrometer order resolution measurements or to perform integrated measurements at the same position. A new underwater vehicle with slight negative buoyancy has been developed which has hardware and software to perform landing on the seafloor. Since the seafloor can change abruptly and at short intervals, the reliability and functioning of such technology requires real-time seafloor classification for detection of suitable landing sites. A landing algorithm has been developed which uses laser profile data to calculate a landing vector coordinate for safe landing in realtime and this has been implemented on a newly developed landing vehicle. An autonomous landing system has been developed which uses this algorithm to perform landing operations. Experiments were conducted at a tank facility to demonstrate real-time computation of the landing algorithm and autonomous landing of the vehicle using the proposed system. Results from the landing experiments conducted are presented in this paper.

IEEE
Sangekar, Mehul
196e042f-c144-4310-aab1-1b8e963ac417
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Nakatani, Takeshi
dc8f7f62-f81e-487b-8a6d-e1a2fb83a810
Bodenmann, Adrian
070a668f-cc2f-402a-844e-cdf207b24f50
Sakamaki, Takashi
57d7b783-d64a-473c-b0e9-fe1e268af3f7
Ura, Tamaki
689db479-1520-4f32-bb7a-ed34b26b921f
Sangekar, Mehul
196e042f-c144-4310-aab1-1b8e963ac417
Thornton, Blair
8293beb5-c083-47e3-b5f0-d9c3cee14be9
Nakatani, Takeshi
dc8f7f62-f81e-487b-8a6d-e1a2fb83a810
Bodenmann, Adrian
070a668f-cc2f-402a-844e-cdf207b24f50
Sakamaki, Takashi
57d7b783-d64a-473c-b0e9-fe1e268af3f7
Ura, Tamaki
689db479-1520-4f32-bb7a-ed34b26b921f

Sangekar, Mehul, Thornton, Blair, Nakatani, Takeshi, Bodenmann, Adrian, Sakamaki, Takashi and Ura, Tamaki (2011) Autonomous landing experiments with an underwater vehicle for multi-resolution wide area seafloor observation. In OCEANS'11 - MTS/IEEE Kona. IEEE..

Record type: Conference or Workshop Item (Paper)

Abstract

The autonomous underwater vehicle has proven to be an important tool for study of the seafloor. Detailed seafloor analysis often requires wide area observations with high resolution information. Certain sensors require close proximity to the seafloor or contact, with stable footing to perform integrated measurements over a period of time. Such wide area high resolution surveys cannot be performed by a cruising or hovering type vehicle alone. In this research the authors propose a new class of AUV along with a survey technique in which an underwater vehicle can generate meter order resolution wide area maps of the seafloor, but at intermediate locations, obtain higher, centimeter order resolution information by lowering scanning speed and altitude and finally, by landing to obtain micrometer order resolution measurements or to perform integrated measurements at the same position. A new underwater vehicle with slight negative buoyancy has been developed which has hardware and software to perform landing on the seafloor. Since the seafloor can change abruptly and at short intervals, the reliability and functioning of such technology requires real-time seafloor classification for detection of suitable landing sites. A landing algorithm has been developed which uses laser profile data to calculate a landing vector coordinate for safe landing in realtime and this has been implemented on a newly developed landing vehicle. An autonomous landing system has been developed which uses this algorithm to perform landing operations. Experiments were conducted at a tank facility to demonstrate real-time computation of the landing algorithm and autonomous landing of the vehicle using the proposed system. Results from the landing experiments conducted are presented in this paper.

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More information

Published date: 1 December 2011
Venue - Dates: MTS/IEEE Kona Conference, OCEANS'11, Kona, HI, United States, 2011-09-19 - 2011-09-22

Identifiers

Local EPrints ID: 434073
URI: http://eprints.soton.ac.uk/id/eprint/434073
PURE UUID: f5711b8a-c385-4441-8883-af7ab1bc3dca

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Date deposited: 11 Sep 2019 16:30
Last modified: 11 Sep 2019 16:30

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