Results 31 to 40 of about 637,784 (341)

A Robust Model Predictive Control Approach for Autonomous Underwater Vehicles Operating in a Constrained workspace

open access: yes, 2018
This paper presents a novel Nonlinear Model Predictive Control (NMPC) scheme for underwater robotic vehicles operating in a constrained workspace including static obstacles.
Heshmati-alamdari, Shahab   +3 more
core   +2 more sources

Use of an ROV with Modulated Lighting for Diagnosing the Technical Condition of Submerged Port Wharf Structures [PDF]

open access: yesTransNav
The technical condition of underwater port structures is critical to the safety and longevity of maritime infrastructure. Traditional inspection techniques, such as diver-assisted surveys, are constrained by safety risks, limited duration, and reduced ...
Adam Kaizer   +5 more
doaj   +1 more source

Design and Implementation of a Crab-Like Underwater Robot System

open access: yes水下无人系统学报
To solve the problems of underwater robots being prone to damage and low work efficiency under complex terrains and strong water flow resistance environments, this paper designed an underwater robot with a crab-like structure.
Pengji LI   +3 more
doaj   +1 more source

Mission Planning and Safety Assessment for Pipeline Inspection Using Autonomous Underwater Vehicles: A Framework Based on Behavior Trees [PDF]

open access: yesOceans
The recent advance in autonomous underwater robotics facilitates autonomous inspection tasks of offshore infrastructure. However, current inspection missions rely on predefined plans created offline, hampering the flexibility and autonomy of the ...
Martin Aubard   +5 more
semanticscholar   +1 more source

The Use of Terrestrial and Maritime Autonomous Vehicles in Nonintrusive Object Inspection

open access: yesSensors, 2022
Traditional nonintrusive object inspection methods are complex or extremely expensive to apply in certain cases, such as inspection of enormous objects, underwater or maritime inspection, an unobtrusive inspection of a crowded place, etc. With the latest
Dmytro Mamchur   +3 more
doaj   +1 more source

Identification of Risks in the Course of Managing the Deep Sea Archeological Projects Using Marine Robotics [PDF]

open access: yes, 2016
An analysis is conducted of the basic risks that occur when managing the projects of deep-sea archeological research. It is proposed to consider possible risks of such projects in the form of a general set of risks that contains subsets of the identified
Nadtoshy, A. (Anatoly)
core   +2 more sources

Characterization of Macro/Microstructure and Corrosion Resistance of Austenitic Gas Tungsten Arc Welding Cladding

open access: yesAdvanced Engineering Materials, EarlyView.
Cladding is a proven method that boosts the surface qualities of mechanical parts by applying a layer of more durable material over a base substrate. This work responds to the needs of offshore and pressure vessels sectors by focusing on cladding a super austenitic steel onto low‐carbon steel through gas tungsten arc welding.
E. J. da Cruz Junior   +6 more
wiley   +1 more source

Active Classification: Theory and Application to Underwater Inspection [PDF]

open access: yes, 2011
We discuss the problem in which an autonomous vehicle must classify an object based on multiple views. We focus on the active classification setting, where the vehicle controls which views to select to best perform the classification.
Hollinger, Geoffrey A.   +2 more
core   +2 more sources

Lithium Intercalation in the Anisotropic Van Der Waals Semiconductor CrSBr

open access: yesAdvanced Functional Materials, EarlyView.
We report the lithium intercalation in the layered van der Waals crystal CrSBr, revealing strongly anisotropic ion‐migration dynamics. Optical and electrical characterization of exfoliated CrSBr shows lithium diffusion coefficients that differ by more than an order of magnitude along a‐ and b‐directions, consistent with molecular dynamics simulations ...
Kseniia Mosina   +13 more
wiley   +1 more source

ROVON: An Ontology for Supporting Interoperability for Underwater Robots

open access: yesJournal of Marine Science and Engineering
Underwater robotics produces diverse and complex streams of sensor, image, video, and navigational data under challenging environmental conditions, creating obstacles for seamless integration and interpretation.
Mansour Taheri Andani, Farhad Ameri
doaj   +1 more source

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