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    Wyświetlanie 1-8 z 8
    Tytuł:
    Inland waterway vessels tracking using closed circuit television
    Autorzy:
    Kujawski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/135539.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    inland shipping
    image and video processing
    tracking objects
    CCTV surveillance
    vessel positioning
    safety of inland navigation
    Opis:
    The aim of this paper is to use closed-circuit television (CCTV) to search and track moving objects in inland waterways. The area of the analysis is the part of the West Odra river between the Długi and Kolejowy bridges in Szczecin. The points of interest are chosen intentionally due to the risk of vessel collision with bridges. The results of the research into the implemented methods of tracking objects could be utilized in the future to extend inland navigation services, which could be used by the captains of the ships and River Information Services operational personnel as well.
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 135-140
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fractional Order Dynamic Positioning Controller
    Autorzy:
    Witkowska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/117405.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Marine Controllers
    Dynamic Positioning Controller
    Dynamic Positioning (DP)
    PID Controller
    Ship Control System
    fractional order
    Dynamic Positioning System
    DP Vessel
    Opis:
    Improving the performance of Dynamic Positioning System in such applications as station keeping, position mooring and slow speed references tracking requires improving the position and heading control precision. These goals can be achieved through the improvement of the ship control system. Fractional-order calculus is a very useful tool which extends classical, integer-order calculus and is used in contemporary modeling and control applications. Fractional-order PI?D? controller, based on the added flexibility of fractional-order operators, are capable of superior performance compared to their integer-order counterparts. This paper presents the fractional order PI?D? controller designed to maintain the ship position and heading and the results were compared with classical integer order PID controller.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 3; 399-404
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Alarm handling onboard vessels operating in DP mode
    Autorzy:
    Nepal, S.
    Gudmestad, O. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086296.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    dynamic positioning
    human
    DP Mode
    alarm handling
    DP vessel
    safety at sea
    alarm management
    Opis:
    This paper explores concerns regarding the design, implementation, and management of alarms in DP vessels that, while in operation, need an incredibly high level of accuracy along with high reliability and safe operations. The Human, Technological, and Organizational factors (HTO) method is primarily used as analysis tool to find weaknesses in alarm handling during DP operations. The research focuses on results collected from Dynamic Positioning Operators (DPO) and instructors. Findings from the survey are presented and compared to the results from past accidents and technical requirements from Petroleum Safety Agency Norway via YA 711. Three accidents from past are referred to picturize the findings from the survey results. Furthermore, the conclusion is given with recommendations reflecting the findings from the survey. The main findings are an urgency to establish a centralized marine accident investigation system which enforces learning and recommendation to make operations safer. In addition, the survey also suggests that prohibition of clients or limiting their access to the bridge is necessary. Manufacturers could focus on research and development of alarm prioritization, on structuring and presentation, and profiting by taking feedback from end-users to make DP operations safer.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 1; 51--56
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Long term validation of high precision RTK positioning onboard a ferry vessel using the MGBAS in the Research Port of Rostock
    Autorzy:
    Ziebold, R.
    Gewies, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/116814.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    vessel's damage consequences
    long term validation
    high precision RTK positioning
    Real Time Kinematic (RTK)
    Maritime Ground Based Augmentation Service (MGBAS)
    Port of Rostock
    Global Positioning System (GPS)
    Ultra High Frequency (UHF)
    Opis:
    In order to enable port operations, which require an accuracy of about 10cm, the German Aerospace Center (DLR) operates the Maritime Ground Based Augmentation Service (MGBAS) in the Research Port of Rostock. The MGBAS reference station provides GPS dual frequency code + phase correction data, which are continuously transmitted via an ultra-high frequency (UHF) modem. Up to now the validation of the MGBAS was rather limited. Either a second shore based station was used as an artificial user, or measurement campaigns on a vessel with duration of a few hours have been conducted. In order to overcome this, we have installed three separate dual frequency antennas and receivers and a UHF modem on the Stena Line ferry vessel Mecklenburg-Vorpommern which is plying between Rostock and Trelleborg. This paper concentrates on the analysis of the highly accurate phase based positioning with a Real Time Kinematic (RTK) algorithm, using correction data received by the UHF modem onboard the vessel. We analyzed the availability and accuracy of RTK fix solutions for several days, whenever the ferry vessel was inside the service area of the MGBAS.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 3; 433-440
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the IANS Chain Using a Satellite System
    Autorzy:
    Czaplewski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/116843.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Interactive Navigational Structures (IANS)
    navigational methods
    navigation techniques
    terrestrial navigation
    vessel traffic service (VTS)
    satellite system
    satellite positioning system
    differential GPS (DGPS)
    Opis:
    This paper presents ideas for creating and developing Interactive Navigational Structures (IANS) by using satellite systems. The author of the present paper introduced the concept of IANS into the literature in 2004 (Czaplewski, 2004). The paper presents the possibility of adapting the contemporary methods of robust estimation that are used in geodesy for the purpose of performing selected marine navigation tasks. IANS utilise modern M-estimation methods. Interactive structures can assist human beings in carrying out special tasks at sea, for example, in identifying objects at sea and on land without the need to approach them. Moreover, these structures can also be used in the process of navigation carried out by underwater vehicles or unmanned watercraft. This paper presents the mathematical methods that are essential for creating IANS. The theoretical assumptions are illustrated with an example of how IANS can be used while performing a typical navigation task. The paper closes with information about research studies which deal with the practical aspects of using this set of mathematical methods.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8 no. 4; 485-493
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Satellite Navigation Techniques for Vessel’s Drift Determination in Piloting Areas
    Autorzy:
    Blokus-Roszkowska, A.
    Jurdziński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/117034.pdf
    Data publikacji:
    2013
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Satellite Navigation Technics
    Global Navigation Satellite System (GNSS)
    Pilot Navigation
    Piloting Area
    Vessel's Drift
    satellite navigation system
    Ship Control System
    Global Positioning System GPS
    Opis:
    The paper deals with use the satellite navigation system for increase safety of navigation in difficult areas. There have been presented an algorithm to ship control procedure during environmental disturbances in narrow passages.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 3; 389-392
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of 3-D Velocity Measurement of Vessel by VI-GPS for STS Lightering
    Autorzy:
    Yoo, Y.
    Pedersen, E.
    Tatsumi, K.
    Kouguchi, N.
    Arai, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/117175.pdf
    Data publikacji:
    2009
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    Global Navigation Satellite System (GNSS)
    Global Positioning System GPS
    Vessel Velocity
    STS Lightering
    3D Velocity Measurement
    Ship-to-Ship (STS) Operation
    Liquefied Natural Gas (LNG)
    Kinematic GPS (KGPS)
    Opis:
    A lightering operation is a type of Ship-To-Ship (STS) operation where two ships are together in open waters and transfer the cargo e.g. crude oil, LNG. High skills and experience are required by the human operators as no relevant equipment for determining the relative speeds and distances with sufficient accuracies has been implemented. The officer in charge of an STS lightering takes the decision on adequate maneuvering orders based on predominantly visual observations during the final approach. Landing on all fenders simultaneously is an objective in order to minimize ship-fender contact forces, but this is rather difficult to achieve in practice even in calm sea due to the effect of hydrodynamic interaction when the ships are closing in. Furthermore, currents that are present in the lightering zone add to the operational complexity. A field measurement experiment has been carried out with a Velocity Information GPS (VI-GPS) system installed onboard a ferry approaching port for berthing which is similar to an STS lightering. The paper proposes to apply VI-GPS as input sensor to a decision-support and guidance system aiming to provide accurate velocity information to the officer in charge of an STS operation. It is argued that DOP of VI-GPS is related to the velocity error.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2009, 3, 1; 43-48
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural redundancy in an offshore vessel dynamic positioning system
    Rezerwowanie strukturalne w systemie dynamicznego pozycjonowania jednostki oceanotechnicznej
    Autorzy:
    Chybowski, L.
    Matuszak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/258318.pdf
    Data publikacji:
    2007
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
    Tematy:
    system techniczny
    pozycjonowanie dynamiczne
    rezerwowanie
    komponenty części zamiennych
    jednostka oceanotechniczna
    system okrętowy
    szacowanie niezawodności
    liczba płaszczyzn zespolonych
    technical system
    dynamic positioning
    redundancy
    spare components
    offshore vessel
    marine system
    reliability estimation
    complex number plane
    Opis:
    A decomposition of dynamic positioning system structures and a description of redundancy in this system using a complex plane have been outlined. System state transition models based on a complex plane have been shortly described and a graph of the system transition has been shown. Application of the redundancy model proposed by the authors for reliability estimation of dynamic positioning system has been presented.
    W materiale zarysowano dekompozycję struktur systemu dynamicznego pozycjonowania oraz specyfikę rezerwowania w tym systemie wykorzystując płaszczyznę zespoloną. Krótko scharakteryzowano przejścia stanów systemu stosując płaszczyznę zespoloną oraz pokazano graf przejść stanów systemu. Przedstawiono zastosowanie modelu rezerwowania zaproponowanego przez autorów dla szacowania niezawodności systemu dynamicznego pozycjonowania.
    Źródło:
    Problemy Eksploatacji; 2007, 3; 41-49
    1232-9312
    Pojawia się w:
    Problemy Eksploatacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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