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Low-cost remotely operated underwater vehicle for underwater observation purposes
2017 IEEE 7th International Conference on Underwater System Technology: Theory and Applications (USYS), 2017This paper is about the development of a low-cost remotely operated underwater vehicle (ROV) for the observation of underwater environments without risking human life. The overall safety feature focuses on protecting internal circuits from being overloaded by any unexpected high current as well as protecting battery from being over-discharged to ...
Wan Muhd Arif Bin Wan Sabri +7 more
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Robust observer design for underwater vehicles
2006 IEEE Conference on Computer Aided Control System Design, 2006 IEEE International Conference on Control Applications, 2006 IEEE International Symposium on Intelligent Control, 2006In this paper we propose a new observer system for underwater vehicles. The main design objective behind this strategy is to reduce the effect of the destabilizing Coriolis and centripetal forces and moments. For low cost vehicles with limited measurement equipment, these forces and moments represent a significant challenge for automatic control when ...
Jon Refsnes +2 more
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Development of an autonomous underwater vehicle for observation of underwater structures
Proceedings of OCEANS 2005 MTS/IEEE, 2005Various kinds of robots have been developed parallel with progress of computer and the operations with robots in the extreme environment such as rescue, space and ocean are getting practical solutions. The underwater robots are expected as one of solutions for underwater activities i.e., maintenance of underwater structures, observations, scientific ...
S. Ohata +4 more
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Single range observability for cooperative underactuated underwater vehicles
Annual Reviews in Control, 2014Abstract The paper addresses the single range observability analysis of a kinematics model of cooperating underactuated underwater vehicles. Teams of underwater vehicles that communicate with each other may be able to access and exchange their relative distances through, by example, acoustic signal time-of-flight measurements.
PARLANGELI, GIANFRANCO +1 more
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Amphibious airplane for underwater observation: Conceptual design
Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2018This paper aims at presenting the conceptual design of an amphibious airplane for underwater observation in the territory of Japan. Taking into account the specificity of this type of vehicles, particular attention should be paid to the analysis of aerodynamic and dynamic characteristics of aircraft.
Yuki Yoshida +2 more
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Marine Observation Network based on Underwater Vehicles
Proceedings of the International Conference on Underwater Networks %Systems - WUWNET '14, 2014Recently, ocean observation is developing from using a single underwater sensor node to employing underwater sensor networks consisting of multiple sensor platforms. Underwater vehicles including underwater gilders and autonomous underwater vehicles (AUVs) are important underwater mobile sensor platforms in ocean observation networks.
Shuo Li +3 more
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Underwater observations of piranhas in western Brazil
Environmental Biology of Fishes, 1990The behaviour of three piranha species,Serrasalmus marginatus, S. spilopleura, andPygocentrus nattereri, and their prey fishes was studied underwater in the Pantanal region, Mato Grosso, Brazil. General habits, predatory tactics, feeding behaviour, and social interactions while foraging, as well as defensive tactics of prey fishes were observed.S ...
Ivan Sazima, Francisco A. Machado
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Underwater observation system using autonomous towed vehicle
Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600), 2005On the project of the improvement of Tokyo Bay Waterway, it was needed to take a picture to confirm the effect of the artificial fish reefs constructed by the ruined blocks of the Third Fort of Tokyo Bay. However, in this sea area, the current is fast and the water depth is too deep for diver's work. Therefore, to develop a new system in order to carry
H. Sakai, T. Tanaka
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An Underwater Observation Dataset of Fish
2018The project contains visualizations of DIDSON clips. The clips are grouped by the species of fish they are known to contain. The data is contained in a SequenceFile and a viewer is available.
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Underwater navigation using diffusion-based trajectory observers
IEEE Journal of Oceanic Engineering, 2007Udgivelsesdato ...
Jouffroy, Jerome, Opderbecke, Jan
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