Results 11 to 20 of about 34,708 (330)

A Vision-Based Underwater Formation Control System Design and Implementation on Small Underwater Spherical Robots

open access: yesMachines, 2022
The ocean is a significant strategic resource, and the insufficient development and use of the ocean, as well as the increase in attention to the ocean, have led to the development of underwater robot technology.
Pengxiao Bao   +3 more
doaj   +1 more source

Simultaneous Localization and Guidance of Two Underwater Hexapod Robots under Underwater Currents

open access: yesSensors, 2023
This paper addresses the simultaneous localization and guidance of two underwater hexapod robots under sea currents. This paper considers an underwater environment where there are no landmarks or features which can assist a robot’s localization.
Jonghoek Kim
doaj   +1 more source

Design and Control of an Underwater Robot Based on Hybrid Propulsion of Quadrotor and Bionic Undulating Fin

open access: yesJournal of Marine Science and Engineering, 2022
Stable, quiet, and efficient propulsion methods are essential for underwater robots to complete their tasks in a complex marine environment. However, with a single propulsion method, such as propeller propulsion and bionic propulsion, it is difficult to ...
Xiaofeng Zeng   +5 more
doaj   +1 more source

Constructing 3D Underwater Sensor Networks without Sensing Holes Utilizing Heterogeneous Underwater Robots

open access: yesApplied Sciences, 2021
This article handles building underwater sensor networks autonomously using multiple surface ships. For building underwater sensor networks in 3D workspace with many obstacles, this article considers surface ships dropping underwater robots into the ...
Jonghoek Kim
doaj   +1 more source

Research on composite fault diagnosis technology of underwater vehicle actuator with positioning error constraint

open access: yesHeliyon, 2023
When diagnosing the composite fault of the actuator, the characteristics of the motion force of the underwater vehicle are not analyzed, and there are diagnostic errors, resulting in the low accuracy of the diagnosis technology.
Dewen Zhu, Zhiyu Zhu
doaj   +1 more source

Robotized Underwater Interventions [PDF]

open access: yes, 2017
Working in underwater environments poses many challenges for robotic systems. One of them is the low bandwidth and high latency of underwater acoustic communications, which limits the possibility of interaction with submerged robots. One solution is to have a tether cable to enable high speed and low latency communications, but that requires a support ...
Casalino, Giuseppe   +2 more
openaire   +2 more sources

Automated soil hardness testing machine [PDF]

open access: yes, 2007
This paper describes the design and performance of a mechatronic system for controlling a standard drop-hammer mechanism that is commonly used in performing outdoor soil or ground hardness tests. A low-cost microcontroller is used to control a hydraulic
Cubero, Samuel N.   +1 more
core   +8 more sources

Salmon behavioural response to robots in an aquaculture sea cage [PDF]

open access: yesRoyal Society Open Science, 2020
Animal–robot studies can inform us about animal behaviour and inspire advances in agriculture, environmental monitoring and animal health and welfare.
M. Kruusmaa   +4 more
doaj   +1 more source

Underwater robot sensing technology: A survey

open access: yesFundamental Research, 2021
Underwater robot technologies are crucial for marine resource exploration and autonomous manipulation, and many breakthroughs have been achieved with key indicators (e.g., dive depth and navigation range).
Yang Cong   +3 more
doaj   +1 more source

Real-time Model-based Image Color Correction for Underwater Robots

open access: yes, 2020
Recently, a new underwater imaging formation model presented that the coefficients related to the direct and backscatter transmission signals are dependent on the type of water, camera specifications, water depth, and imaging range.
Li, Alberto Quattrini, Roznere, Monika
core   +1 more source

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