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Tytuł:
Estimation of the Safety of Navigation Under Bridges
Ocena bezpieczeństwa żeglugi w rejonie mostów
Autorzy:
Zaikov, V.
Hajduk, J.
Kuznetsova, T. Y.
Powiązania:
https://bibliotekanauki.pl/articles/906451.pdf
Data publikacji:
2005
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
safety of navigation
fairways
ship's movement simulation
Opis:
The paper presents assumptions concerning estimation of the safety of navigation under a bridge over the river. Taking into account these assumptions, the simulation of the river push train movement has been carried out using MMSIM computer software. The described method can be used for determining ship's swept path in various hydro-meteorological conditions and for designing the type of a bridge to be built and the position of piers providing for an accepted level of navigational.
Przedstawiono założenia dotyczące oceny bezpieczeństwa żeglugi na rzekach w rejonie mostów. Opierając się na tych założeniach dokonano symulacji ruchu rzecznych zestawów pchanych z wykorzystaniem programu MMSIM. Prezentowana metoda może być stosowana zwłaszcza do określania pasów ruchu statku przy różnych warunkach hydrometeorologicznych oraz do projektowania długości przęseł mostów zapewniających określony poziom bezpieczeństwa żeglugi.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2005, 6 (78); 361-366
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An adaptive island model of population for neuroevolutionary ship handling
Autorzy:
Łącki, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/2033282.pdf
Data publikacji:
2021
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
artificial neural networks
evolutionary algorithms
neuroevolution
ship movement control
ship manoeuvring
Opis:
This study presents a method for the dynamic value assignment of evolutionary parameters to accelerate, automate and generalise the neuroevolutionary method of ship handling for different navigational tasks and in different environmental conditions. The island model of population is used in the modified neuroevolutionary method to achieve this goal. Three different navigational situations are considered in the simulation, namely, passing through restricted waters, crossing with another vessel and overtaking in the open sea. The results of the simulation examples show that the island model performs better than a single non-divided population and may accelerate some complex and dynamic navigational tasks. This adaptive island-based neuroevolutionary system used for the COLREG manoeuvres and for the finding safe ship’s route to a given destination in restricted waters increases the accuracy and flexibility of the simulation process. The time statistics show that the time of simulation of island NEAT was shortened by 6.8% to 27.1% in comparison to modified NEAT method.
Źródło:
Polish Maritime Research; 2021, 4; 142-150
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Algorithms for Ship Movement Prediction for Location Data Compression
Autorzy:
Czapiewska, A.
Sadowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/116761.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Methods and Algorithms
Ship Movement, Ship Movement Prediction
Location
Location Data Compression
Autoregressive Model (AR)
Autoregressive Moving Average Model (ARMA)
AIS Data
Opis:
Due to safety reasons, the movement of ships on the sea, especially near the coast should be tracked, recorded and stored. However, the amount of vessels which trajectories should be tracked by authorized institutions, often in real time, is usually huge. What is more, many sources of vessels position data (radars, AIS) produces thousands of records describing route of each tracked object, but lots of that records are correlated due to limited dynamic of motion of ships which cannot change their speed and direction very quickly. In this situation it must be considered how many points of recorded trajectories really have to be remembered to recall the path of particular object. In this paper, authors propose three different methods for ship movement prediction, which explicitly decrease the amount of stored data. They also propose procedures which enable to reduce the number of transmitted data from observatory points to database, what may significantly reduce required bandwidth of radio communication in case of mobile observatory points, for example onboard radars.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 1; 75-81
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Two-dimensional coordinate estimation for missing automatic identification system (AIS) signals based on the discrete Kalman filter algorithm and universal transverse mercator (UTM) projection
Autorzy:
Jaskólski, K.
Powiązania:
https://bibliotekanauki.pl/articles/135285.pdf
Data publikacji:
2017
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
AIS
Kalman filter
AIS data estimation
data fusion
ship movement prediction
ship motion tracking
Opis:
Due to safety reasons, the movement of a ship in coastal areas should be monitored, tracked, recorded, and stored. The Automatic Identification System (AIS) is a suitable tool to use in performing these functions. The probability limit for the AIS dynamic data availability can be limited by the lack of a Global Position System (GPS) signal, heading (HDG), and rate of turn (ROT) data in the position report. The unavailability of a data link is an additional limitation. To fill this gap, it is possible to attach the discrete Kalman filter (KF) for the position and course estimation. Coordinate estimation in the absence of a transmission link can improve the quality of the AIS service at Vessel Traffic Service (VTS) stations. This paper has presented the Kalman filtering algorithm to improve the possibilities for ship motion tracking and monitoring in the TSS (Traffic Separation Scheme) and fairways area. More than 570 iterations were calculated and the results have been presented in figures to familiarize the reader with the operating principle of the Kalman filter algorithm.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 82-89
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Autonomous ships concept and mathematical models application in their steering process control
Autorzy:
Melnyk, O.
Onishchenko, O.
Onyshchenko, S.
Voloshyn, A.
Kalinichenko, Y.
Rossomakha, O.
Naleva, G.
Powiązania:
https://bibliotekanauki.pl/articles/2211982.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
autonomous ship
steering process control
mathematical model
autonomous ship concept
accident-free navigation
automatic steering system
ship automatic movement
ship automatic movement control system
Opis:
Advances in computer systems and innovative technologies along with their implementation into the shipping industry not only enabled efficient data exchange between the ship and the shore, but also created a single integrated information network linking all participants of the process and all elements of the maritime sector. Development of the concept of autonomous ships and automated control facilities for their functionality became the next stage in the evolution of innovations. The process of software adaptation, additional electronic steering systems, optical and digital means of monitoring as well as satellite communication facilities for autonomous ships are among the tasks which require search and development of the solutions. Provision of reliable and safe functioning of such ships in the autonomous mode requires development of models and methods for ensuring their accident-free navigation both in relation to the process of ships divergence and improvement of automatic steering systems of movement and course steadiness. In the given work, the analysis of realization of the crewless navigation and possibility of ship automatic movement control systems advancement on the basis of application of mathematical model for the purpose of enhancement of process of the autonomous ship steadiness on the set course is proposed.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 3; 553--559
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simulation method for the determining the minimum pull of tugs assisting in port manoeuvres
Autorzy:
Gucma, Stanisław
Gucma, Maciej
Gralak, Rafał
Bilewski, Mateusz
Muczyński, Bartosz
Powiązania:
https://bibliotekanauki.pl/articles/135005.pdf
Data publikacji:
2019
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
port manoeuvring
simulation of ship movement
manoeuvring safety
tug assistance
determination
minimum safe pull
Opis:
The article presents a simulation method for determining the minimum safe pull of tugs assisting in port manoeuvres. The method can be used to determine the relationship between the minimum safe pull, understood as the tension on the line, of the assisting tugs and the overall length, cargo capacity or net capacity of ships manoeuvring in a given port under allowable hydrometeorological conditions. The method was verified through simulated tests of gas tankers’ entry, turning and berthing at the LNG terminal of Świnoujście.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 57 (129); 49-55
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of Świnoujście port areas and approach channel parameters for safe operation of 300-meter bulk carriers
Autorzy:
Gucma, S.
Powiązania:
https://bibliotekanauki.pl/articles/135687.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
marine traffic engineering
waterways
computer simulation of ship movement
safety of navigation
seaport
approach
Opis:
This article presents the optimized parameters of the Świnoujście seaport entrance and three-kilometer fairway linking Świnoujście and Szczecin, extended to allow the safe entry of 300-meter bulk carriers drawing up to 13.5 meters. The parameters were determined by a simulation-based optimization method, where the objective function and its constraint were, respectively, the reconstruction costs of that waterway section and the vessels’ navigation safety. The study made use of real-time simulation in coordination with the vessel’s human operator.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 48 (120); 125-133
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CFD Based Hull Hydrodynamic Forces for Simulation of Ship Manoeuvres
Autorzy:
Tabaczek, T.
Gornicz, T.
Kulczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/117623.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Manoeuvring
Simulation of Ship Manoeuvres
Equations of Ship's Movement
Hydrodynamic Forces
CFD Computations
Hydrodynamic Characteristics
Ship's Motion
mathematical model
Opis:
There have been developed numerous mathematical models describing the motion of a ship. In opinion of present authors the CFD is mature enough to determine with confidence the hydrodynamic characteristics necessary to simulate ship manoeuvres. In this paper the authors present the attempt to determine the hull hydrodynamic forces using the results of CFD computations of ship flow. Results show qualitative agreement with reference data and reveal shortcomings due to simplifying assumptions applied in CFD computations.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 31-35
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Assessment of Drafting Ship Movement Parameters Using Radar and the Automatic Identification System
Autorzy:
Stupak, T.
Wąż, M.
Powiązania:
https://bibliotekanauki.pl/articles/116516.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Automatic Identification System (AIS)
radar
ship movement parameters
movement vector research
IMO standards
ARPA
vessel movement vector
GMU radar laboratory
Opis:
This article presents the movement vector research conducted in the radar laboratory of Gdynia Maritime University and during vessel cruises. The precision of designating the vessels' location, course, speed and CPA were researched using on-baord radars and AIS data. It is concluded that the precision of designating the researched parameters is greater than the International Maritime Organization requires.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 301-304
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the Calculated Wind Loads to the Power Generated by the Main Propulsion and Thrusters of the Ship with the Results of Simulation Tests
Autorzy:
Formela, K.
Powiązania:
https://bibliotekanauki.pl/articles/116285.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
marine simulation
port maneuvers
ship's movement
main propulsion
thruster
simulation tests
Port of Gdynia
wind loads
Opis:
One of the main factors affecting the safe port maneuvers by ships is wind, which directly affects the ship's movement. The article presents a comparison of calculated wind loads to the power generated by thrusters and the main propulsion of the ship with the results of simulation tests in order to determine the safe wind force limits allowing safe port maneuvers with a particular ship model.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 2; 315-319
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
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