Results 251 to 260 of about 50,279 (277)

Underwater acoustic spiral wave navigation system

The Journal of the Acoustical Society of America, 2022
A spiral wave navigation beacon is described that creates an outgoing signal with a wavefront that is a diverging spiral cylindrical wave followed by a reference signal of circular wavefront as previously described by Dzikowicz and Hefner in JASA. In this demonstration, the signals are created by driving a cylindrical transducer’s orthogonal sine and ...
Isabella Di Bona, Christopher Gravelle, Zakaria Faddi, David A. Brown, Corey Bachand   +4 more
openaire   +1 more source

Navigation of underwater autonomous vehicles

Proceedings of the 2000 International Symposium on Underwater Technology (Cat. No.00EX418), 2002
The paper suggests an approach to solving the problem of navigation of an underwater vehicle using acoustic and geometric data and gravitation field potential changing in time. The known methods of making seafloor acoustic maps are not effective for correction of coordinates in areas of smooth relief and in shallow water. The suggested algorithm allows
V.I. Korochentsev, A.N. Rozenbaum, A.I. Deshner, B.V. Okhota, V.A. Kartashov   +4 more
openaire   +1 more source

Autonomous Underwater Vehicle Navigation

2016
This chapter surveys the problem of navigation for autonomous underwater vehicles (AUV s). Navigation is critical for the safety and effectiveness of AUV missions. The unavailability of global positioning system (GPS ) underwater makes AUV navigation a challenging research problem.
John J. Leonard, Alexander Bahr
openaire   +1 more source

Autonomous underwater navigation and control

Robotica, 2001
This paper describes the autonomous navigation and control of an undersea vehicle using a vehicle control architecture based on the Distributed Architeclure for Mobile Navigation and a terrain-aided navigation technique based on simultaneous localisation and map building.
Stefan B. Williams, Paul Newman, Julio Rosenblatt, Gamini Dissanayake, Hugh Durrant-Whyte   +4 more
openaire   +1 more source

Active-imaging-based underwater navigation

SPIE Proceedings, 2015
Global navigation satellite systems (GNSS) are widely used for the localization and the navigation of unmanned and remotely operated vehicles (ROV). In contrast to ground or aerial vehicles, GNSS cannot be employed for autonomous underwater vehicles (AUV) without the use of a communication link to the water surface, since satellite signals cannot be ...
David Monnin, Gwenaël Schmitt, Colin Fischer, Martin Laurenzis, Frank Christnacher   +4 more
openaire   +1 more source

An underwater cooperative navigation scheme

2013 MTS/IEEE OCEANS - Bergen, 2013
In this article we present and discuss a cooperative localization and navigation system based on the Extended Kalman Filter specifically designed to meet the requirements of the underwater environment. These lead us to consider a SLAM-like scheme in which some other Autonomous Underwater Vehicles (AUVs) play the role of mobile environment features and ...
Marcelo Nogueira, Joao Souza, Fernando Pereira   +2 more
openaire   +1 more source

Tactical underwater navigation system (TUNS)

2008 IEEE/ION Position, Location and Navigation Symposium, 2008
The problem of underwater navigation for an individual diver is particularly challenging. GPS navigation is unsuitable for most underwater operations and particularly covert operations use because the GPS RF signal is attenuated below usable levels as it penetrates the water column. Dead reckoning methods, which rely on magnetic compass and approximate
Randy Hartman, Wes Hawkinson, Kevin Sweeney   +2 more
openaire   +1 more source

Vision based autonomous underwater vehicle navigation: underwater cable tracking

Oceans '97. MTS/IEEE Conference Proceedings, 2002
In this paper, a vision based autonomous underwater vehicle (AUV) navigation system is proposed and its performance is demonstrated by an autonomous underwater cable tracking (AUCT) mission at Lake Biwa using the test bed AUV "Twin-Burger" available at the University of Tokyo.
B.A.A.P. Balasuriya, M. Takai, W.C. Lam, T. Ura, Y. Kuroda   +4 more
openaire   +1 more source

Underwater transponder positioning and navigation of autonomous underwater vehicles

OCEANS 2009, 2009
Navigation of underwater vehicles has been and remains a substantial challenge to all platforms. The need for improved accuracy and robustness, sustainability, and de-risking develops with the emergence of new applications, and with the growing acceptance of autonomous underwater vehicles (AUVs) in both military and civilian institutions.
Oyvind Hegrenas, Kenneth Gade, Ove Kent Hagen, Per Espen Hagen   +3 more
openaire   +1 more source

Some Problems of Underwater Navigation

Journal of Navigation, 1951
The problems of submarine navigation are entirely distinct from those encountered on the surface. Not only does the medium introduce a third dimension, which is not wholly analagous to that of the air since a definite limit is imposed on depth, but also a great many of the aids to surface navigation are either restricted in their use underwater, or are
openaire   +1 more source