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1
Блінцов, Олександр Володимирович. "Current problems of tethered underwater systems design." Technology audit and production reserves 5, no. 5(13) (September 11, 2013): 38–40. http://dx.doi.org/10.15587/2312-8372.2013.18406.
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2
Blintsov, V. S., O. P. Klochkov, and P. S. Kucenko. "CLASSIFICATION CHARACTERISTICS OF UNMANNED TETHERED UNDERWATER SYSTEMS AS A COMPONENT OF IMPROVING THE EFFICIENCY OF THEIR DESIGN." Scientific Bulletin Kherson State Maritime Academy 1, no. 22 (2020): 86–98. http://dx.doi.org/10.33815/2313-4763.2020.1.22.086-098.
Повний текст джерелаАнотація:
The design stage is considered to be rather resource-intensive in the entire process of creating marine robotic technology. Therefore, the applied scientific task of reducing the resource costs for those processes is of high interest. Among other things, the time consumed for design stage has to be reduced by determining the design characteristics at an early stage of design. The approach considered to reduce such costs involves structuring the classification features of tethered underwater systems in such a way as to simplify the selection and justification of design solutions at the stage of preliminary system design. For design engineers of underwater equipment, the list of classification features of tethered self-propelled and those towed underwater systems has been suggested. The list is based on a system approach and is structured according to material, energy, information and operational (functional) criteria. All of that enables performing the comparative assessment of existing systems upon key indicators and formalizing the processes of their synthesis at early stages of design. To demonstrate the capabilities of the system approach, the generalized algorithm for the organization of design works using the system of classification features of tethered self-propelled and towed underwater systems at the early stages of their design. The algorithm involves the formation and structuring of many classification features of such systems as the initial stage of the process of making effective design decisions in the early stages of design of underwater robotics. It has been revealed that putting in use the classification features system in question, enables deploying minimal project resources to make reference to the relevant databases and decide on already-existing artifact projects and select out of those available in the underwater equipment market key components and parts of underwater systems which would satisfy the requirements of the technical task of implementing the tethered underwater systems. That would significantly reduce the prime cost of design works and enhance the competitiveness of domestic science-based achievements in the markets of marine robotics.
3
Блінцов, Олександр Володимирович. "The design conception of multipurpose underwater tethered systems with centralized data exchange." Eastern-European Journal of Enterprise Technologies 6, no. 9(66) (December 12, 2013): 31. http://dx.doi.org/10.15587/1729-4061.2013.19158.
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4
Olinger, David J. "Underwater Power Kites." Mechanical Engineering 139, no. 06 (June 1, 2017): 38–43. http://dx.doi.org/10.1115/1.2017-jun-2.
Повний текст джерелаАнотація:
This article discusses different features of underwater kites and its advantages in the turbine industry. The underwater kite moves fastest when it slaloms through the current in this way, much like a water skier. Electricity generated by the mounted turbine generator is transmitted along the tether to a moored, floating buoy, and then onto the power grid. This concept, now known as the Tethered Undersea Kite (TUSK), was first conceived by Magnus Landberg, a researcher in Sweden, in 2007. Underwater kites look to be feasible to build using commercial available technology. According to economic analyses conducted by other research teams, TUSK systems may be able to produce electricity at about half the current cost for fixed hydrokinetic turbines, and a bit below the cost of the power produced by offshore wind turbines. Those researchers attribute the lower costs to improved power-to-weight ratios derived from replacing the inner blades and support tower of a traditional turbine with a lightweight, low-cost tether.
5
Klochkov, Oleksandr P. "The project tasks of single link self-propelled tethered underwater systems energy supply." Shipbuilding & marine infrastructure 1(11) (2019): 96–104. http://dx.doi.org/10.15589/smi2019.1(11).11.
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6
Alvarez, Miguel, and Hosam K. Fathy. "Outcomes and Insights From Simplified Analytic Trajectory Optimization for a Tethered Underwater Kite." IEEE Control Systems Letters 6 (2022): 2204–9. http://dx.doi.org/10.1109/lcsys.2021.3139589.
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Barker, Laughlin D. L., Michael V. Jakuba, Andrew D. Bowen, Christopher R. German, Ted Maksym, Larry Mayer, Antje Boetius, Pierre Dutrieux, and Louis L. Whitcomb. "Scientific Challenges and Present Capabilities in Underwater Robotic Vehicle Design and Navigation for Oceanographic Exploration Under-Ice." Remote Sensing 12, no. 16 (August 11, 2020): 2588. http://dx.doi.org/10.3390/rs12162588.
Повний текст джерелаАнотація:
This paper reviews the scientific motivation and challenges, development, and use of underwater robotic vehicles designed for use in ice-covered waters, with special attention paid to the navigation systems employed for under-ice deployments. Scientific needs for routine access under fixed and moving ice by underwater robotic vehicles are reviewed in the contexts of geology and geophysics, biology, sea ice and climate, ice shelves, and seafloor mapping. The challenges of under-ice vehicle design and navigation are summarized. The paper reviews all known under-ice robotic vehicles and their associated navigation systems, categorizing them by vehicle type (tethered, untethered, hybrid, and glider) and by the type of ice they were designed for (fixed glacial or sea ice and moving sea ice).
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Nedelcu, Andra-Teodora, Cătălin Faităr, Nicolae Buzbuchi, and Liviu Stan. "Study Simulation of Umbilical Cable for Underwater Vehicle." Bulletin of the Polytechnic Institute of Iași. Machine constructions Section 67, no. 3 (September 1, 2021): 19–32. http://dx.doi.org/10.2478/bipcm-2021-0014.
Повний текст джерелаАнотація:
Abstract This paper presents a series of analyses regarding the tethered umbilical cable in uniform current cable from the composition of the underwater remotely operated vehicle (ROV). The remotely operated vehicle is used in different undersea operation when it is important to control and determine precisely the disturbance forces generated by drag due to currents that act either on the vehicle directly or indirectly on the tether umbilical cable. The dynamics of umbilical cable represent an important part in ocean environment being used for signal and power transmission application. To perform the simulation in Ansys Aqwa, two axis systems are considered. A coordinate system related to the earth, represented by the key in front of which the measurements are made and a second coordinate system related to the vehicle at a set depth relative to the surface of the key. The results obtained from the simulation show us the drag forces that are exerted on the chosen cable for a given length, drag that appear both the seaborne platforms and underwater remotely vehicle contact.
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Sedunov, Alexander, Hady Salloum, Nikolay Sedunov, Christopher Francis, Sergey Tsyuryupa, Aleksandr Merzhevskiy, Daniel Kadyrov, and Alexander Sutin. "Stevens Passive Acoustic Detection System (SPADES -2) and its prospective application for windfarm underwater noise assessment." Journal of the Acoustical Society of America 151, no. 4 (April 2022): A239. http://dx.doi.org/10.1121/10.0011185.
Повний текст джерелаАнотація:
Stevens Institute of Technology has been conducting development and field tests of various underwater passive acoustic systems for several years. Several such systems provided localization of boats and divers triangulation. The new version of SPADES has a tethered low-cost bottom-mounted circular 2.2-m underwater acoustic array with eight custom-built hydrophones. The cost of the array was significantly reduced by manufacturing the hydrophones in-house and utilizing a lightweight and low-cost tether. The tether can provide power and communication up to 1 km away and power to the data acquisition. The software has been developed for real-time direction-finding using Steered Power Response Phase Transform (SRP-PHAT) method, combined with region-zeroing (RZ) approach to multi-source separation and custom noise background estimation subtraction. The array was tested for seven months in the shallow and busy waters of the Hudson River tracking small boat activity. The system’s reliability and long tether make it attractive for long-term observation of underwater noise such as monitoring wind farm noise marine mammals and shipping traffic. Direction-finding can help identify noise unrelated to wind farms.
10
Wernli, Robert. "The Present and Future Capabilities of Deep ROVs." Marine Technology Society Journal 33, no. 4 (January 1, 1999): 26–40. http://dx.doi.org/10.4031/mtsj.33.4.4.
Повний текст джерелаАнотація:
The following paper will present an overview of Remotely Operated Vehicles (ROVs) and, in particular, their use in the deep ocean, which includes depths beyond 10,000 feet. Although the intent of the paper is to address tethered, free-flying vehicles, the categories of deep towed vehicles and autonomous underwater vehicles (AUVs) will also be included for completeness. And, to properly discuss the state-of-the-art in such deep ocean systems, their capabilities in the depths less than 10,000 ft will also be addressed. An attempt to project their uses in the early stages of the next millennium wiU also be made.
11
Blintsov, Volodymyr, and Kostiantyn Trunin. "Improving the designing of marine tethered systems using the principles of shipbuilding 4.0." Eastern-European Journal of Enterprise Technologies 1, no. 13 (109) (February 26, 2021): 35–48. http://dx.doi.org/10.15587/1729-4061.2021.225512.
Повний текст джерелаАнотація:
This paper considers the issues and theoretical aspects related to improving the design of maritime tethered systems (MTSs) with flexible links (FLs) using underwater towed systems (UTSs) as an example. That allows them to be used in the early stages of design by implementing the principles of Shipbuilding 4.0 and BIM technologies. Such regimes have not previously been described by existing mathematical models (MMs). The expected result of the current study is a significant decrease in the cost of different resources. At the same time, the basic reliable results of design solutions could be obtained already in the early stages of design. The theoretical basis of the proposed method for improving the design of MTS with FL is the improved design concept (IDC) for MTS with FL while the tool base of the method is a special modeling complex (SMC). The use of IDC along with SMC at the research (pre-prototype) design phase reduces the number of MTS design stages. The proposed method to improve the design of MTS with FL, based on the MM that notates the dynamics of MTS FL and MTS with FL, makes it possible to investigate different modes of operation of almost all MTS classes. That allows devising the recommendations for predicting possible operational loads in order to design their elements. At the same time, there is an opportunity to improve the existing methods for calculating and designing MTS with FL with the required properties and parameters, and to bring them to the level of engineering application. The application of SMC at the pre-prototype design stage makes it possible to avoid the use of physical modeling of the operational regimes of MTS with FL associated with the full-scale testing on the high seas
12
Northcutt, Jay G., Art A. Kleiner, Thomas S. Chance, and Joe Lee. "Cable Route Surveys Utilizing Autonomous Underwater Vehicles (AUVs)." Marine Technology Society Journal 34, no. 3 (January 1, 2000): 11–16. http://dx.doi.org/10.4031/mtsj.34.3.3.
Повний текст джерелаАнотація:
Detailed geophysical surveys are required in both deep and shallow water to avoid potential hazards and to provide for the installation and safety of fiber optic telecommunication cables. Unfortunately, data obtained in potential burial zones with existing technology are slow and often data accuracy may be questionable. Towing cabled or tethered survey systems, from a project perspective, is time consuming and provides marginally adequate data. Additionally, a launch is usually required to survey between the surf and the safe working limits of the survey ship. This requires additional equipment that is weather sensitive and subject to failure.To address this problem, C & C Technologies, Inc. of Lafayette, Louisiana, USA has contracted with Kongsberg Simrad for the construction of a Hugin 3000 autonomous underwater vehicle (AUV). C & C Technologies’ Hugin 3000 AUV, which is to be delivered in July of 2000, will be integrated with a variety of sensors including high frequency multibeam swath bathymetry and imagery. Other survey sensors include chirp side scan sonar, chirp sub-bottom profiler, and magnetometer. Vehicle positioning will be provided by a USBL acoustic positioning system, integrated with Doppler speed log, an inertial navigation system, and for surface operations, DGPS. AUV power will be delivered by aluminum oxygen fuel cells.This paper will address AUV operations, platform performance, sensor specifications and integration, project milestones, and system economics with regards to cable route surveys.
13
Krishfield, R., J. Toole, A. Proshutinsky, and M.-L. Timmermans. "Automated Ice-Tethered Profilers for Seawater Observations under Pack Ice in All Seasons." Journal of Atmospheric and Oceanic Technology 25, no. 11 (November 1, 2008): 2091–105. http://dx.doi.org/10.1175/2008jtecho587.1.
Повний текст джерелаАнотація:
Abstract An automated, easily deployed Ice-Tethered Profiler (ITP) instrument system, developed for deployment on perennial sea ice in the polar oceans to measure changes in upper ocean water properties in all seasons, is described, and representative data from prototype instruments are presented. The ITP instrument consists of three components: a surface subsystem that sits atop an ice floe; a weighted, plastic-jacketed wire-rope tether of arbitrary length (up to 800 m) suspended from the surface element; and an instrumented underwater unit that employs a traction drive to profile up and down the wire tether. ITPs profile the water column at a programmed sampling interval; after each profile, the underwater unit transfers two files holding oceanographic and engineering data to the surface unit using an inductive modem and from the surface instrument to a shore-based data server using an Iridium transmitter. The surface instrument also accumulates battery voltage readings, buoy temperature data, and locations from a GPS receiver at a specified interval (usually every hour) and transmits those data daily. Oceanographic and engineering data are processed, displayed, and made available in near–real time (available online at http://www.whoi.edu/itp). Six ITPs were deployed in the Arctic Ocean between 2004 and 2006 in the Beaufort gyre with various programmed sampling schedules of two to six one-way traverses per day between 10- and 750–760-m depth, providing more than 5300 profiles in all seasons (as of July 2007). The acquired CTD profile data document interesting spatial variations in the major water masses of the Canada Basin, show the double-diffusive thermohaline staircase that lies above the warm, salty Atlantic layer, measure seasonal surface mixed layer deepening, and document several mesoscale eddies. Augmenting the systems already deployed and to replace expiring systems, an international array of more than one dozen ITPs will be deployed as part of the Arctic Observing Network during the International Polar Year (IPY) period (2007–08) holding promise for more valuable real-time upper ocean observations for operational needs, to support studies of ocean processes, and to facilitate numerical model initialization and validation.
14
Kalvin, Roman, Juntakan Taweekun, Muhammad Waqas Mustafa, Faisla Ishfaq, and Saba Arif. "Design and Fabrication of Under Water Remotely Operated Vehicle." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 82, no. 1 (April 21, 2021): 133–44. http://dx.doi.org/10.37934/arfmts.82.1.133144.
Повний текст джерелаАнотація:
Underwater Remotely Operated vehicle is a tethered mobile vehicle most often used to monitor underwater oil and gas drilling inspection, telecommunications and homeland security. The main focus of this research is to design a vehicle at low cost which is safe, portable, and easy to use while increasing the maneuverability and efficiency to reach a depth of 5 meters. While conducting research a unique design is selected based on a novel fin propulsion mechanism rather than propellers. Propellers though have high speed but cannot work on low flow rates and their blades can be damaged if jelly fish or other material is struck in its shaft. Two shapes have been considered to remove above difficulties i.e. Fish and Turtle. Due to higher stability, larger area and greater hydrodynamic efficiency Sea Turtle has been selected, as it can easily overcome the forces like buoyancy, pressure and thrust force. The results extracted from this research shows that the underwater vehicles based on the biological locomotion principle can perform very well than other propeller counterparts. The research concludes with the performance of a working system that validates motion capabilities related to speed, depth and hydrodynamic efficiency which can be further improved by using sophisticated control systems, outer shell and highly integrated processors.
15
Dowdeswell, J. A., J. Evans, R. Mugford, G. Griffiths, S. McPhail, N. Millard, P. Stevenson, et al. "Autonomous underwater vehicles (AUVs) and investigations of the ice–ocean interface in Antarctic and Arctic waters." Journal of Glaciology 54, no. 187 (2008): 661–72. http://dx.doi.org/10.3189/002214308786570773.
Повний текст джерелаАнотація:
AbstractLimitations of access have long restricted exploration and investigation of the cavities beneath ice shelves to a small number of drillholes. Studies of sea-ice underwater morphology are limited largely to scientific utilization of submarines. Remotely operated vehicles, tethered to a mother ship by umbilical cable, have been deployed to investigate tidewater-glacier and ice-shelf margins, but their range is often restricted. The development of free-flying autonomous underwater vehicles (AUVs) with ranges of tens to hundreds of kilometres enables extensive missions to take place beneath sea ice and floating ice shelves. Autosub2 is a 3600 kg, 6.7 m long AUV, with a 1600 m operating depth and range of 400 km, based on the earlier Autosub1 which had a 500 m depth limit. A single direct-drive d.c. motor and five-bladed propeller produce speeds of 1–2 m s−1. Rear-mounted rudder and stern-plane control yaw, pitch and depth. The vehicle has three sections. The front and rear sections are free-flooding, built around aluminium extrusion space-frames covered with glass-fibre reinforced plastic panels. The central section has a set of carbon-fibre reinforced plastic pressure vessels. Four tubes contain batteries powering the vehicle. The other three house vehicle-control systems and sensors. The rear section houses subsystems for navigation, control actuation and propulsion and scientific sensors (e.g. digital camera, upward-looking 300 kHz acoustic Doppler current profiler, 200 kHz multibeam receiver). The front section contains forward-looking collision sensor, emergency abort, the homing systems, Argos satellite data and location transmitters and flashing lights for relocation as well as science sensors (e.g. twin conductivity–temperature–depth instruments, multibeam transmitter, sub-bottom profiler, AquaLab water sampler). Payload restrictions mean that a subset of scientific instruments is actually in place on any given dive. The scientific instruments carried on Autosub are described and examples of observational data collected from each sensor in Arctic or Antarctic waters are given (e.g. of roughness at the underside of floating ice shelves and sea ice).
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Fearn, Samuel J., Suresh Kaluvan, Thomas B. Scott, and Peter G. Martin. "An Open-Source Iterative Python Module for the Automated Identification of Photopeaks in Photon Spectra." Radiation 2, no. 2 (April 25, 2022): 193–214. http://dx.doi.org/10.3390/radiation2020014.
Повний текст джерелаАнотація:
The UK, and other countries worldwide, have benefited from nuclear energy to provide a low-carbon power source to fuel their increasing populations and industrial growth. In support of the extensive end-of-life decommissioning activities ongoing globally, as well as to enable accident clean-up and nuclear security/monitoring provisions; systems are necessary to rapidly and accurately detect and attribute the nature of any nuclear and/or radioactive materials. To facilitate the utilisation of the increasing suite of miniaturised radiation sensor systems for a range of largely robotic (whether aerial, underwater or ground-based) deployment applications, without the issue of being ’tethered’ to a specific vendor or system, an open-source and compact python module has been developed. Within this readily integrable code-base designed for incorporation into wider software architectures (such as the Robotic Operating System, or ROS), gamma-ray spectroscopy data are recorded in real-time and processed with a peak identification procedure once sufficient data has been recorded. Iterative peak-fitting is applied to determine the isotopic compositions of the incident radiation. The stand-alone application comprises two connected components: a small detector-specific module (or wrapper) that translates a detector’s serial output into the desired format, ahead of the main analysis function. Second, a photopeak identification is performed through an algorithm which uses the second derivative of the spectrum. The peaks identified are subsequently labelled by the program, utilizing the properties of all the mathematically detected/derived peaks, and finally output in a user-defined format for subsequent usage.
17
Fearn, Samuel J., Suresh Kaluvan, Thomas B. Scott, and Peter G. Martin. "An Open-Source Iterative Python Module for the Automated Identification of Photopeaks in Photon Spectra." Radiation 2, no. 2 (April 25, 2022): 193–214. http://dx.doi.org/10.3390/radiation2020014.
Повний текст джерелаАнотація:
The UK, and other countries worldwide, have benefited from nuclear energy to provide a low-carbon power source to fuel their increasing populations and industrial growth. In support of the extensive end-of-life decommissioning activities ongoing globally, as well as to enable accident clean-up and nuclear security/monitoring provisions; systems are necessary to rapidly and accurately detect and attribute the nature of any nuclear and/or radioactive materials. To facilitate the utilisation of the increasing suite of miniaturised radiation sensor systems for a range of largely robotic (whether aerial, underwater or ground-based) deployment applications, without the issue of being ’tethered’ to a specific vendor or system, an open-source and compact python module has been developed. Within this readily integrable code-base designed for incorporation into wider software architectures (such as the Robotic Operating System, or ROS), gamma-ray spectroscopy data are recorded in real-time and processed with a peak identification procedure once sufficient data has been recorded. Iterative peak-fitting is applied to determine the isotopic compositions of the incident radiation. The stand-alone application comprises two connected components: a small detector-specific module (or wrapper) that translates a detector’s serial output into the desired format, ahead of the main analysis function. Second, a photopeak identification is performed through an algorithm which uses the second derivative of the spectrum. The peaks identified are subsequently labelled by the program, utilizing the properties of all the mathematically detected/derived peaks, and finally output in a user-defined format for subsequent usage.
18
Ghasemi, Amirmahdi, David J. Olinger, and Gretar Tryggvason. "A Nonlinear Computational Model of Tethered Underwater Kites for Power Generation." Journal of Fluids Engineering 138, no. 12 (September 12, 2016). http://dx.doi.org/10.1115/1.4034195.
Повний текст джерелаАнотація:
The dynamic motion of tethered undersea kites (TUSK) is studied using numerical simulations. TUSK systems consist of a rigid winged-shaped kite moving in an ocean current. The kite is connected by tethers to a platform on the ocean surface or anchored to the seabed. Hydrodynamic forces generated by the kite are transmitted through the tethers to a generator on the platform to produce electricity. TUSK systems are being considered as an alternative to marine turbines since the kite can move at a high-speed, thereby increasing power production compared to conventional marine turbines. The two-dimensional Navier–Stokes equations are solved on a regular structured grid to resolve the ocean current flow, and a fictitious domain-immersed boundary method is used for the rigid kite. A projection method along with open multiprocessing (OpenMP) is employed to solve the flow equations. The reel-out and reel-in velocities of the two tethers are adjusted to control the kite angle of attack and the resultant hydrodynamic forces. A baseline simulation, where a high net power output was achieved during successive kite power and retraction phases, is examined in detail. The effects of different key design parameters in TUSK systems, such as the ratio of tether to current velocity, kite weight, current velocity, and the tether to kite chord length ratio, are then further studied. System power output, vorticity flow fields, tether tensions, and hydrodynamic coefficients for the kite are determined. The power output results are shown to be in good agreement with the established theoretical results for a kite moving in two dimensions.