Dynamic positioning ≈ Dynamic positioning
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Network-Based T–S Fuzzy Dynamic Positioning Controller Design for Unmanned Marine Vehicles Open
This paper is concerned with a Takagi-Sugeno (T-S) fuzzy dynamic positioning controller design for an unmanned marine vehicle (UMV) in network environments. Network-based T-S fuzzy dynamic positioning system (DPS) models for the UMV are fi…
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Dynamic Positioning With Model Predictive Control Open
Marine vessels with dynamic positioning (DP) capability are typically equipped with sufficient number of thrusters to make them overactuated and with satellite navigation and other sensors to determine their position, heading, and velocity…
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Robust Position Control of an Over-actuated Underwater Vehicle under Model Uncertainties and Ocean Current Effects Using Dynamic Sliding Mode Surface and Optimal Allocation Control Open
Underwater vehicles (UVs) are subjected to various environmental disturbances due to ocean currents, propulsion systems, and un-modeled disturbances. In practice, it is very challenging to design a control system to maintain UVs stayed at …
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Fully automatic visual servoing control for work-class marine intervention ROVs Open
ROVs with hydraulic manipulators are extensively used for subsea intervention. With camera feedback from the scene, manipulators are teleoperated and slaved to pilot held master arms. While standard for offshore oil and gas, for challengin…
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Navigation, guidance and control of an overactuated marine surface vehicle Open
This article presents navigation, guidance and control (NGC) experimental results obtained on an innovative overactuated unmanned surface marine vessel (USV) capable of omnidirectional motion. The results were obtained during sea trials in…
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Improved UWB TDoA-Based Positioning Using a Single Hotspot for Industrial IoT Applications Open
The goal of this paper is to investigate Ultra WideBand (UWB) localization with Time Difference of Arrival (TDoA) processing at the anchors. We consider scenarios where the anchors are placed very close to each other and the target to be l…
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ON SELF-PROPULSION ASSESSMENT OF MARINE VEHICLES Open
Estimation of ship self-propulsion is important for the selection of the propulsion system and the main engine so that the ship can move forward with the required speed. Resistance characteristics of the vessel or the open-water performanc…
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Navigational safety assessment based on Markov-Model approach Open
Safety analysis of complex technical systems currently operating in the transport sector is an urgent challenge for the global maritime industry, which suffers from a lack of information about the levels of risk and the consequences of the…
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Development of an Automatic Identification System Autonomous Positioning System Open
In order to overcome the vulnerability of the global navigation satellite system (GNSS) and provide robust position, navigation and time (PNT) information in marine navigation, the autonomous positioning system based on ranging-mode Automa…
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An Ultra-Short Baseline Underwater Positioning System with Kalman Filtering Open
The ultra-short baseline underwater positioning is one of the most widely applied methods in underwater positioning and navigation due to its simplicity, efficiency, low cost, and accuracy. However, there exists environmental noise, which …
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FPSO/LNG hawser system lifetime assessment by Gaidai multivariate risk assessment method Open
Floating Production Storage and Offloading (FPSO) unit being an offshore vessel, storing and producing crude oil, prior to crude oil being transported by accompanying shuttle tanker. Critical mooring/hawser strains during offloading operat…
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Fuzzy neural network-based robust adaptive control for dynamic positioning of underwater vehicles with input dead-zone Open
This paper proposes a design for a robust adaptive controller for the Dynamical Positioning (DP) of underwater vehicles with unknown hydrodynamic coefficients, unknown disturbances and input dead-zones. First, for convenience of controller…
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Development of a Dynamic Positioning System for the ReVolt Model Ship Open
A Dynamic Positioning (DP) control system is developed, implemented and tested for a scale model of DNV GL's concept ship ReVolt. This model-scale ship is used as a test platform for sensors and control systems used in autonomous vessels, …
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Design and Validation of Dynamic Positioning for Marine Systems: A Case Study Open
The design of a DP-system is a challenging task with several technical fields involved in the problem solution.
\nNumerical simulation is a powerful tool in order to aid the designer during the system development and to
\nspeed up the desi…
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Practical constrained dynamic positioning control for uncertain ship through the minimal learning parameter technique Open
In this note, a novel adaptive constrained control algorithm is proposed for dynamic positioning vessels in the presence of input amplitude and rate saturations. In the scheme, both kinematics and kinetics loops are augmented by the auxili…
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Application of neuro-fuzzy algorithm to portable dynamic positioning control system for ships Open
This paper describes the nonlinear dynamic motion behavior of a ship equipped with a portable dynamic positioning (DP) control system, under external forces. The waves, current, wind, and drifting forces were considered in the calculations…
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Wave motion compensation in dynamic positioning of small autonomous vessels Open
Conventional dynamic positioning (DP) systems on larger ships compensate primarily for slowly time-varying environmental forces. In doing so, they use wave filtering to prevent the DP from compensating for the first-order wave motions. Thi…
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Temporal decision-making factors in risk analyses of dynamic positioning operations Open
Nearly all dynamic positioning (DP) operations are characterized by limited time available for the DP operator to detect and act upon a loss of position. Collision risk is analyzed with a quantitative risk analysis, which usually does not …
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Review of Dynamic Positioning Control in Maritime Microgrid Systems Open
For many offshore activities, including offshore oil and gas exploration and offshore wind farm construction, it is essential to keep the position and heading of the vessel stable. The dynamic positioning system is a progressive technology…
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Dynamic Positioning using Deep Reinforcement Learning Open
This paper demonstrates the implementation and performance testing of a Deep Reinforcement Learning based control scheme used for Dynamic Positioning of a marine surface vessel. The control scheme encapsulated motion control and control al…
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Thrust Allocation With Dynamic Power Consumption Modulation for Diesel-Electric Ships Open
Modern ships and offshore units built for dynamic positioning (DP) are often powered by an electric power plant consisting of two or more diesel-electric generators. Actuation in any desired direction is achieved by placing electrical thru…
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A Scheme on Indoor Tracking of Ship Dynamic Positioning Based on Distributed Multi-Sensor Data Fusion Open
Investigating the model ship dynamic positioning system by simulating the actual sea conditions in the laboratory can not only avoid the risks caused by the directly experiments on a true ship, but also reduce the costs. With the purpose o…
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Decision support system’s concept for design of combined propulsion complexes Open
It is shown that there are many mathematical models (MM) of ship power plants for various purposes. Such MM are integrated into decision support systems (DSS) and used in the design and power optimization of ship power plants (SPP) of vari…
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Dynamic Analysis and Extreme Response Evaluation of Lifting Operation of the Offshore Wind Turbine Jacket Foundation Using a Floating Crane Vessel Open
The jacket is the most widely-used fixed foundation for offshore wind turbines due to its superior strength and low installation cost in relatively deep waters. Floating crane vessels are commonly used to install jacket foundations. Howeve…
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Robust Adaptive Fuzzy Control Using Genetic Algorithm for Dynamic Positioning System Open
This paper aims to develop a genetic algorithm to adjust an fuzzy controller for Vessels' Dynamic Positioning System (Vessels' DPs). It is well-known that nonlinearities affecting the control accuracy of the DPs are related to the arrangem…
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Lifting simulation of an offshore supply vessel considering various operating conditions Open
Recently, an offshore support vessel is being widely used to install an offshore structure such as a subsea equipment which is laid on its deck. The lifting operation which is one of the installation operations includes lifting off, liftin…
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Ultra-wideband pose detection system for boom-type roadheader based on Caffery transform and Taylor series expansion Open
To realize unmanned pose detection of a coalmine boom-type roadheader, an ultra-wideband (UWB) pose detection system (UPDS) for a roadheader is designed, which consists of four UWB positioning base stations and three roadheader positioning…
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A Neural Network Approach to Control Allocation of Ships for Dynamic Positioning Open
Dynamic Positioning (DP) of ships is a control mode that seeks to maintain a specific position (stationkeeping) or perform low-speed maneuvers. In this paper, a static Neural Network (NN) is proposed for control allocation of an over-actua…
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Optimizing Fuel Consumption in Thrust Allocation for Marine Dynamic Positioning Systems Open
In offshore maritime operations, automated systems capable to maintain the vessel’s position and heading using its own propellers and thrusters to compensate exogenous disturbances, like wind, waves and currents, are referred to as Marine …
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Development and Real-Time Performance Evaluation of Energy Management Strategy for a Dynamic Positioning Hybrid Electric Marine Vessel Open
Hybridisation of energy sources in marine vessels has been recognized as one of the feasible solutions to improve fuel economy and achieve global emission reduction targets in the maritime sector. However, the overall performance of a hybr…