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Wyszukujesz frazę "ship collision avoidance" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Implementation of a preliminary inference algorithm for an automatic communication system
Autorzy:
Wójcik, A.
Banaś, P.
Powiązania:
https://bibliotekanauki.pl/articles/135525.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
e-Navigation
ship encounter situations
automatic communication
inference methods
collision avoidance
Opis:
One of the factors affecting a ship’s safety during its voyage is the ability to detect encounter situations. Navigators mostly use two parameters: closest point of approach (CPA) and time to CPA (TCPA). Their limit values, considered as safe, depend on the parameters of the vessel, geographic area, and weather conditions. These limits are set by the navigator and are based on his experience; however, in specific situations, there is a need to use other parameters, such as ship domain. It is very important for the automated communication system to determine the critical moment when intership communication should be started. The article presents an algorithm of automatic detection of situations where the communication should be initiated. The influence of data relating to the vessel, geographic area, and weather conditions can be taken into account. The output produced by the program, based on the authors’ algorithm, is presented.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 46 (118); 54-57
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Navigation decision support for sea-going ships in port approach areas
Autorzy:
Pietrzykowski, Z.
Magaj, J.
Wielgosz, M.
Powiązania:
https://bibliotekanauki.pl/articles/135370.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
navigation
decision support
safety
approach area
ship domain
traffic monitoring
collision avoidance
Opis:
Port approaches are high-traffic areas with limited manoeuvring space. Navigation in such areas requires the analysis of large amounts of information, which can impede decision processes. One solution may be the development of decision support systems dedicated to these areas. This paper presents an attempt to build a navigation decision support system operable in the approach area leading to the port of Świnoujście (Poland), with ship domain implemented as a safety criterion. Assumptions for a decision support system to be used by sea-going vessels in port approach areas are formulated and discussed. Specific features of these areas, such as traffic density, bathymetry, available manoeuvring space and legal limitations are taken into account. The source and scope of information available to the ship have been analysed. The scope of decision support has been defined. A ship domain has been proposed as a safety criterion. Approach areas leading to the port of Świnoujście have been investigated on the basis of real Automatic Identification System (AIS) data. Vessel movement processes in the chosen area were analysed. Ship domains in various parts of the area were determined. The first results concerning criteria for navigational safety assessment are presented. The conducted studies showed significant differences in the size of domains. A case study was performed on a decision support system operable in the approach area leading to Świnoujście.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 54 (126); 75-83
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The modified artificial potential fields method in collision situations at sea
Autorzy:
Mielniczuk, Sylwia
Powiązania:
https://bibliotekanauki.pl/articles/29521054.pdf
Data publikacji:
2023
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
collision avoidance maneuvers
ship encounters
safety
artificial potential field method
repulsion coefficients
APF factor
Opis:
This paper proposes a modified artificial potential fields (APF) method for collision avoidance at sea. The concept of artificial potentials used herein is derived from fields generated by electric charges. Attractive and repulsive forces are determined, accounting for the positions of an own vessel and a target vessel. The own vessel and its goal are considered as opposite charges. There is an attractive force between them, while the own vessel and target vessels or obstacles are considered as charges with a repulsive force between them. The values of these forces depend on the coefficients of attraction and repulsion. To solve a particular collision situation, the modified method of artificial potential fields is used. Due to the specific nature of the vessels’ movement, additional factors affecting the values of the attraction and repulsive forces are considered, as opposed to solutions used for robots. The main purpose of this article is to present the method for determining the coefficients of the APF method. This method will be used to avoid collisions at sea. From an analysis of factors influencing the execution of the vessel maneuver in a collision situation, a modified method for determining the attraction and repulsion coefficients is proposed. A case study of collision avoidance in a vessel encounter situation is also conducted.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2023, 73 (145); 73-81
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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