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Numerical Modeling of Wave Disturbances in the Process of Ship Movement Control
2018
Algorithms
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The article presents a numerical model of sea wave generation as an implementation of the stochastic process with a spectrum of wave angular velocity. ...
The model was used for simulation tests of the influence of disturbances on the course stabilization system of the ship. ...
The effect of wave action on the process of ship movement control (in various control problems) can easily be determined by measuring a ship's angular velocity. ...
doi:10.3390/a11090130
fatcat:i7z4gmcvk5ec5dsmaeoe2cppya
Nonlinear observers design for multivariable ship motion control
2012
Polish Maritime Research
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The observers make use of the simplified nonlinear mathematical model of ship motion in which the neglected ship dynamics and disturbances are modelled using bias. ...
The designed observers firstly have been simulated on a computer model where their parameters were calibrated, and then were implemented on the physical model of the training ship "Blue Lady" in the ship ...
c) First-order wave-induced model Modelling the ship movements generated by the waves of the first order is done based on the model of waves of the second order proposed by Balchen et al., [3] who used ...
doi:10.2478/v10012-012-0023-5
fatcat:zu3qebzctvfrpcgsgwzyfecja4
Dynamics analysis and active control of a floating crane
2015
Tehnički Vjesnik
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This paper analyses the dynamics of a floating crane and presents an active heave compensation system (HCS) to allow the payloads motion decoupled from the wave-induced ship motion in the vertical direction ...
A virtual mechanical model of the floating crane is created to analyse the dynamics of the floating crane. In addition, an active HCS is designed for the under actuated floating crane system. ...
movement of ship's deck decoupled from the wave-induced ship motion. ...
doi:10.17559/tv-20151026154842
fatcat:5zfx3pzuc5daza6o5pu3nub7xa
Simulation and experimental study on control strategy of zero-speed fin stabilizer based on disturbance and compensation
2018
PLoS ONE
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The control strategy of zero-speed fin stabilizer is obtained based on disturbance and compensation by analyzing the phase matching relationship between the wave disturbance, the roll motion of the ship ...
, the movement of the fin and the fin-induced hydrodynamic force. ...
In this paper, the control strategy is obtained based on disturbance and compensation by analyzing the phase matching of the wave disturbance, the roll motion of the ship, the movement of the fin and the ...
doi:10.1371/journal.pone.0204446
pmid:30273372
pmcid:PMC6166952
fatcat:ev6glechrrdijdg672dalj2bce
Investigation of robust ship course control based on auxiliary loop method
2021
Cybernetics and Physics
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A novel robust control law is investigated on the problem of ship stabilization on the trajectory, which allows one to compensate perturbations in the parameters of the mathematical model of ship dynamics ...
The synthesized ship course control system was investigated in MATLAB. The law of controlling the ship's course with unknown parameters and external disturbances in the power supply is proposed. ...
, as well as parameter disturbances in cases of changes in the dynamic model of the ship caused by external conditions. ...
doi:10.35470/2226-4116-2021-10-4-248-252
fatcat:dvp6k5jkive25doqxt64y4nztu
Pd Controller Based Unmanned Ship Navigation
2017
Zenodo
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For the improvement of the performance of track keeping of unmanned water vehicle numerous ship models, wave disturbances models and distinct control algorithms has been proposed. ...
In this paper we have implemented PD based controller for trajectory control of unmanned vehicle considering all standard models of sea disturbances. ...
Since sea waves are random in nature, the dynamics of sea states are taken into account to predict the ship movements. ...
doi:10.5281/zenodo.580641
fatcat:eusuhilowzgk5krzepj5tzpbua
PD CONTROLLER BASED UNMANNED SHIP NAVIGATION
2017
International journal of research - granthaalayah
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For the improvement of the performance of track keeping of unmanned water vehicle numerous ship models, wave disturbances models and distinct control algorithms has been proposed. ...
In this paper we have implemented PD based controller for trajectory control of unmanned vehicle considering all standard models of sea disturbances. ...
Since sea waves are random in nature, the dynamics of sea states are taken into account to predict the ship movements. ...
doi:10.29121/granthaalayah.v5.i4raceee.2017.3337
fatcat:jewf5qot3ben5jot2our67poh4
Analysis of impact of disruptions coming from a ship on the accuracy of determining the location of the tracked air target by the modified optoelectronic scanning and tracking IR seeker
2016
Zeszyty Naukowe Akademii Marynarki Wojennej
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The paper presents the results of research whose aim was to specify the impact of disruptions coming from the movement of a ship on the accuracy of determining the location of the tracked target by the ...
The basic task of OSTS consists in detecting and then tracking closely the detected air target, emitting infrared radiation. ...
Figures 3-6 show the results of numerical processing of a file with the buoyancy shown in figure 2 which can be treated as the dynamic rolling of a ship on sea waves. ...
doi:10.5604/0860889x.1202434
fatcat:qlqyoytd5fbfxc2nxbi6kmicfe
Hydrodynamic-Interaction Analysis of an Autonomous Underwater Hovering Vehicle and Ship with Wave Effects
2019
Symmetry
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This study investigates an important working model of the AUH approaching a host ship in waves. ...
Numerical analysis of motion RAO of the AUH in roll with the damping effect was compared to the experimental data in wave-frequency range 0.2–1.0 Hz, resulting in the average error being reduced from 21.03% ...
Research on the hydrodynamic-interaction performance of wave-induced disturbance on a hovering AUV and a host ship is significant to the overall design process of the AUV and/or scientific-research ships ...
doi:10.3390/sym11101213
fatcat:t2vzgdsalrflfphpyjiae7s54i
Dynamic Modeling and Adaptive Controlling in GPS-Intelligent Buoy (GIB) Systems Based on Neural-Fuzzy Networks
2020
Ad hoc networks
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The most important feature of the proposed model for the positioning buoys is its independence from comparative knowledge or information on the dynamics and the unwanted disturbances of ships. ...
In order to model the network with the proposed technique, uncertainties and the unwanted disturbances are studied in the neural network. ...
Initial speed of wave motion curves u, initial speed of oscillation v, and horizontal rotation speed of ship around the vertical axis with respect to time with PID controller in constant disturbance, ...
doi:10.1016/j.adhoc.2020.102149
fatcat:cvai5o4vpjgifcvgc6suwcunoa
Surface Effect Ship with Four Air Cushions Part II: Roll and Pitch Damping
2019
IFAC-PapersOnLine
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The air cushions can lift up to 90 % of the total vessel mass depending on the output of the controller. ...
This paper introduce damping of roll and pitch motion on a Surface Effect Ship (SES) in low vessel speeds. ...
Simulation environment The numerical simulations will be carried out in a process plant model referred to as SESSim, Ola M. Haukeland, Hassani, and Auestad 2019 . ...
doi:10.1016/j.ifacol.2019.12.296
fatcat:ljhd5gan35ghfdcvdd3rtwvrk4
The Influence Of The Ship's Steering Machine Over Yaw And Roll Motions
2003
Analele Universităţii "Dunărea de Jos" Galaţi: Fascicula III, Electrotehnică, Electronică, Automatică, Informatică
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The goal of this paper is to analyze the steering machine limitations and their influence over yaw and roll motions of the ship. ...
It is important to know the influence of the steering machine, trying to avoid the limitations or to include them into the control law. ...
This can affect the simulation results, when different moments of time are studied. Therefore, the first loop can not be disregarded.
Wave model In this paper, wave disturbances are considered. ...
doaj:1639b23e40cb4b3e8ab82b55ee39a8d2
fatcat:6w65pdi4ovcevj7c7awvgkugaq
Environmental Influence on Automatic Landing Error of the Carrier-Borne Aircraft
2013
Research Journal of Applied Sciences Engineering and Technology
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The aim of this study is to analyze the movement model of aircraft carrier and stern flow model under the influence of marine sport. ...
; marine sports and aft flow always affect the movement of an aircraft carrier and landing process of carrier-borne aircraft. ...
The objective of the study is to analyze the movement model of aircraft carrier and stern flow model under the influence of marine sport. ...
doi:10.19026/rjaset.5.4818
fatcat:kh4aki7lvbc73mptgmvv2ocgg4
Review of Dynamic Positioning Control in Maritime Microgrid Systems
2020
Energies
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The theory of dynamic positioning has been studied and developed in terms of control techniques to achieve greater accuracy and reduce ship movement caused by environmental disturbance for more than 30 ...
To maintain the vessels or platforms from displacement, its thrusters are used automatically to control and stabilize the position and heading of vessels in sea state disturbances. ...
In DPS applications, the mathematical model of the process involves external changes in wind, current, and wave disturbances and limitations in the input and output variables. ...
doi:10.3390/en13123188
fatcat:b5mvs3ojdvclvglajrtbcps3d4
Considerations regarding the laboratory testing of electro-hydraulic heave compensators
2019
Technium
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Movements of lifting / lowering of vessels / platforms carrying cranes or drilling rigs, caused by the disturbing dynamics of the waves, varying in force, frequency, direction and amplitude, affect the ...
Due to the resonance in the cable of the load lifting system, caused by the movement of the vessel on a rough sea, the tension in the cable can increase more than 100 times. ...
The control models for the heave compensation systems have evolved into today's predictive semi-active models, with the prediction of the intensity of the wave agitation. ...
doi:10.47577/technium.v1i.6
fatcat:3iuwdy7yevg2tcvblhijf5rq7u
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