Results 11 to 20 of about 847,616 (208)

Design of Sliding Mode Autopilot with Steady-state Error Elimination for Autonomous Underwater Vehicles [PDF]

open access: yes, 2006
Autonomous Underwater Vehicles (AUVs) have nonlinear and time-varying behaviour and unmodelled dynamics. This paper describes the design, development and evaluation of nonlinear sliding mode autopilot system for an AUV to control the speed, steering and ...
Shi, Juan, Juan Shi
core   +7 more sources

State-of-the-Art System Solutions for Unmanned Underwater Vehicles

open access: yesRadioengineering, 2009
Unmanned Underwater Vehicles (UUVs) have gained popularity for the last decades, especially for the purpose of not risking human life in dangerous operations. On the other hand, underwater environment introduces numerous challenges in navigation, control
A. E. Yilmaz, B. Gokalp, O. Yildiz
doaj   +1 more source

Underwater Optical-Sonar Image Fusion Systems

open access: yesSensors, 2022
Unmanned underwater operations using remotely operated vehicles or unmanned surface vehicles are increasing in recent times, and this guarantees human safety and work efficiency. Optical cameras and multi-beam sonars are generally used as imaging sensors
Hong-Gi Kim, Jungmin Seo, Soo Mee Kim
doaj   +1 more source

Applications of inverse simulation to a nonlinear model of an underwater vehicle [PDF]

open access: yes, 2008
Inverse simulation provides an important alternative to conventional simulation and to more formal mathematical techniques of model inversion. The application of inverse simulation methods to a nonlinear dynamic model of an unmanned underwater ...
Murray-Smith, D., Lu, L., McGookin, E.
core   +5 more sources

Effects of Regular Waves on Propulsion Performance of Flexible Flapping Foil

open access: yesApplied Sciences, 2018
The objective of the present study is to analyze the effects of waves on the propulsive performance and flow field evolution of flexible flapping foil, and then offer a way to take advantage of wave energy.
Peng Liu   +4 more
doaj   +1 more source

Research Progress on Corrosion of Structural Materials for Unmanned Underwater Submersible Vehicles [PDF]

open access: yesCailiao Baohu
Unmanned underwater vehicles are one of the indispensable tools for people to develop, utilize and explore the ocean, and have broad military application prospects.With the continuous progress and development of science and technology, unmanned ...
ZHANG Qichao, ZHANG Baolong, JIANG Yishan, ZHAO Xin, SONG Penglei, XIAO Feng.
doaj   +1 more source

Collaborative Control of Unmanned Underwater Vehicles [PDF]

open access: yesJournal of Physics: Conference Series, 2021
Abstract This paper targets at urgent issues, which are the search for complex underwater environments and the effective control of underwater seas. Firstly, studies the collaborative control of task-oriented UUV. Secondly, designs reasonable controllers and prove the rendezvous of UUV.
Huailong Wang, Zhenxing Yao, Yinghui Guo
openaire   +1 more source

Self-Supervised Pre-Training Joint Framework: Assisting Lightweight Detection Network for Underwater Object Detection

open access: yesJournal of Marine Science and Engineering, 2023
In the computer vision field, underwater object detection has been a challenging task. Due to the attenuation of light in a medium and the scattering of light by suspended particles in water, underwater optical images often face the problems of color ...
Zhuo Wang   +3 more
doaj   +1 more source

Towards of multi-source data fusion framework of geo-referenced and non-georeferenced data: prospects for use in surface water bodies

open access: yesGeocarto International, 2023
This paper proposes an approach of fusion geo-referenced and non-georeferenced data. These data can be acquired by a) unmanned surface vehicles (USVs), b) unmanned aerial vehicles (UAVs), c) airborne and submersible optical sensors, d) acoustic sensors ...
Fermín Villalpando   +3 more
doaj   +1 more source

Research on Unmanned Underwater Vehicle Threat Assessment [PDF]

open access: yesIEEE Access, 2019
The unmanned underwater vehicle (UUV) plays an ever increasing and important role in the modern marine environment. In particular, the tasks of underwater reconnaissance and surveillance, underwater mine hunting and anti-submarine warfare, all poses a serious and dangerous threat to humans.
Hongfei Yao   +4 more
openaire   +2 more sources

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