Results 21 to 30 of about 255 (170)

Hydrothermal Chimney Distribution on the Endeavour Segment, Juan de Fuca Ridge

Geochemistry, Geophysics, Geosystems, 2020
The Endeavour Segment of the Juan de Fuca Ridge is well known for its abundance of hydrothermal vents and chimneys. One‐meter scale multibeam mapping data collected by an autonomous undersea vehicle revealed 572 chimneys along the central 14 km of the ...
David A. Clague, Julie F. Martin, Jennifer B. Paduan, David A. Butterfield, John W. Jamieson, Morgane Le Saout, David W. Caress, Hans Thomas, James F. Holden, Deborah S. Kelley   +9 more
doaj   +1 more source

Modeling and Simulation of Cross-Rudder Underactuated AUV Based on Kane Dynamics

水下无人系统学报, 2023
In order to obtain a more accurate dynamics model of autonomous undersea vehicles(AUVs), the kinematics and dynamics equations of the cross-rudder underactuated AUV were deduced by introducing the related knowledge of Kane dynamics.
Ke YANG
doaj   +1 more source

Bistatic seabed scattering measurements from an autonomous undersea vehicle [PDF]

Proceedings of Meetings on Acoustics, 2012
A bistatic seabed scattering measurement technique is described using a towed source (1600-3500 Hz) and towed array in close proximity to the seabed probing vertical angles from 6-20o and bistatic angles from 126-160o. The data strongly support sediment volume scattering as the mechanism that controls the seabed scattering at 2400 Hz across the entire ...
Charles W. Holland, Chad Smith, Peter L. Nielsen   +2 more
openaire   +1 more source

Waypoint-tracking Control of a Benthic AUV Based on Model-free Adaptive Control Method

水下无人系统学报, 2022
In this study, the model-free adaptive control(MFAC) method was applied to a waypoint-tracking control system to solve the problems of high uncertainty in the marine environment and difficulty in accurately determining the benthic autonomous undersea ...
Peng GAO, Lei WAN, Yu-fei XU, Guo-fang CHEN, Zi-yang ZHANG   +4 more
doaj   +1 more source

Nonlinear optimization of autonomous undersea vehicle sampling strategies for oceanographic data‐assimilation [PDF]

Journal of Field Robotics, 2007
AbstractThe problem of how to optimally deploy a suite of sensors to estimate the oceanographic environment is addressed. An optimal way to estimate (nowcast) and predict (forecast) the ocean environment is to assimilate measurements from dynamic and uncertain regions into a dynamical ocean model.
Kevin D. Heaney, Glen Gawarkiewicz, Timothy F. Duda, Pierre F. J. Lermusiaux   +3 more
openaire   +1 more source

Applied Model‐Based Analysis and Synthesis for the Dynamics, Guidance, and Control of an Autonomous Undersea Vehicle [PDF]

Mathematical Problems in Engineering, 2010
Model‐based analysis and synthesis applied to the dynamics, guidance, and control of an autonomous undersea vehicle are presented. As the dynamic model for describing vehicle motion mathematically, the equations of motion are derived. The stability derivatives in the equations of motion are determined by a simulation‐based technique using computational
Kim, Kangsoo, Ura, Tamaki
openaire   +1 more source

Visual Guidance Algorithm for AUV Recovery Based on CNN Object Tracking

水下无人系统学报, 2022
The development of autonomous undersea vehicle recovery technology is the main approach to solve problems pertaining to energy and information transmission and to enhance the underwater detection and concealment capabilities of unmanned systems.
Ze-kai HAN, Xing-hua ZHU, Xiao-jun HAN, Kai SUN, Xiao-yu LIU   +4 more
doaj   +1 more source

Design and Testing of a Minimal Configuration Underwater Micro‐Glider: Automating Lake and Reservoir Monitoring

Journal of Field Robotics, EarlyView.
ABSTRACT Uncrewed underwater vehicles (UUVs) have transformed oceanographic research through autonomous data gathering. Similarly, lake and other aquatic research can potentially be automated and transformed. However, UUVs would need to be smaller, lighter, less complex, and cheaper than currently available to make them more practical and user‐friendly
James M Rand, Alan Hunter, Danielle Wain, Lee D Bryant   +3 more
wiley   +1 more source

Effectiveness Assessment of Underwater Area Cruise Based on the ADC Method

Journal of Field Robotics, EarlyView.
ABSTRACT Underwater area surveillance plays a crucial role in upholding national security, safeguarding strategic interests, and mitigating potential threats. Despite its significance, a notable gap persists in the availability of comprehensive models for assessing its effectiveness.
Qingwei Liang, Yuxin Lin, Mingyang Luo, Zhanghong Zeng   +3 more
wiley   +1 more source

Dumpsite Seabed Characterization of the San Pedro Basin, CA, From Autonomous Vehicle Observations

Journal of Field Robotics, EarlyView.
ABSTRACT A wide‐area seabed survey was conducted using autonomous underwater vehicles (AUVs) in a known dumpsite off the coast of Southern California that has been found to have widespread sediment contamination from the chemical dichlorodiphenyltrichloroethane (DDT).
Ryan A. McCarthy, Dylan Kriegman, Sophia T. Merrifield, Heidi Batchelor, Eric J. Terrill   +4 more
wiley   +1 more source