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    Wyświetlanie 1-5 z 5
    Tytuł:
    The Machine Learning Method of PIDVCA
    Autorzy:
    Li, L.
    Wang, X.
    Chen, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841618.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    learning methods
    personified intelligence
    collision avoidance
    dynamic collision avoidance
    static collision avoidance
    Opis:
    Building a dynamic collision knowledge base of self-learning is one of the core contents of implementing "personified intelligence" in Personifying Intelligent Decision-making for Vessel Collision Avoidance (short for PIDVCA). In the paper, the machine learning method of PIDVCA combined with offline artificial learning and online machine learning is proposed. The static collision avoidance knowledge is acquired through offline artificial learning, and the isomeric knowledge representation integration method with process knowledge as the carrier is established, and the Dynamic collision avoidance knowledge is acquired through online machine learning guided by inference engine. A large number of simulation results show that the dynamic collision avoidance knowledge base constructed by machine learning can achieve the effect of anthropomorphic intelligent collision avoidance. It is verified by examples that the machine learning method of PIDVCA can realize target perception, target cognition and finally obtain an effective collision avoidance decision-making.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 3; 533-540
    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 perfect warning to avoid collisions at sea?
    Autorzy:
    Baldauf, M.
    Mehdi, R.
    Fischer, S.
    Gluch, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/135016.pdf
    Data publikacji:
    2017
    Wydawca:
    Akademia Morska w Szczecinie. Wydawnictwo AMSz
    Tematy:
    collision avoidance
    collision warning
    manoeuvring decision support
    dynamic prediction methods
    Fast-Time-Simulation
    Opis:
    Avoidance of collisions is one of the most important tasks for the officer of the watch on a ship’s bridge. Measures and actions required to avoid such accidents are described in the Convention on the International Regulations for Preventing Collisions at Sea (COLREGs) adopted by the International Maritime Organization (IMO) in 1972 and still valid, with several minor amendments, since then. On the basis of a proper look-out at all times, by sight and hearing, and the use of all available means, also including technical equipment installed on-board as well as information provided by a Vessel Traffic Service (VTS), the navigating officer collects traffic and environmental data and combines them with their own ship data to construct a mental traffic image for the assessment of risk of collision with other objects in the vicinity. In the case wherre there is an unacceptable risk she or he has to decide on taking action. In most of the cases decision making is appropriate to the prevailing circumstances and ships maneuver and pass at a safe distance. Only in very rare cases, due to whatever reasons, watch officers fail in taking appropriate actions in good time. It is assumed that, if effective alerting algorithms would be available, a substantial number of collisions at sea, and especially in coastal waters, can be avoided by making the watch officer aware that the ‘last line of defence’ for taking action is close to come. It is assumed that there is potential in applying the principle of the resolution advisory alert of an ACAS (Airborne Collision Avoidance System)/TCAS (Traffic Alert and Collision Avoidance System) in aviation and adapt it to the needs of maritime traffic. In this paper, the authors introduce a method for triggering collision warnings by focusing specifically on the critical last phase of an encounter and taking into account the maneuvering characteristics of the navigating ship. They comprehensively explore the application using scenario studies discussing the operational aspects of varying implementation states (one ship only, SOLAS ships only).
    Źródło:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 52 (124); 53-64
    1733-8670
    2392-0378
    Pojawia się w:
    Zeszyty Naukowe Akademii Morskiej w Szczecinie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The choice of the maneuver of the vessel’s passing considering the coordination’s system of the interactive vessels and their dynamic characteristics
    Autorzy:
    Volkov, Y.
    Pyatakov, E.
    Kalinichenko, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/117145.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    collision avoidance
    avoidance maneuver
    dynamic models of the vessel rotation motion
    altering of course
    ships dynamics
    choice of the maneuver
    colregs
    vessels dynamic characteristics
    Opis:
    The maneuver of the altering course of the vessel is a more preferable to avoid a collision. Due to that the calculation of the parameters of the avoidance maneuver should be done considering the dynamic characteristics of the vessel in maneuvering. The paper analyzes the dynamic models of the vessel rotation motion in order to select more appropriate one for the calculation of avoidance maneuver of the vessel applying the altering of the course.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 79-82
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modern method based on artificial intelligence for safe control in the marine environment
    Autorzy:
    Mohamed-Seghir, Gdynia Maritime University, Gdynia, Poland
    Powiązania:
    https://bibliotekanauki.pl/articles/24201419.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    safe ship's trajectory
    collision avoidance
    artificial intelligence
    artificial neural network
    fuzzy logic
    evolutionary algorithms
    dynamic programming
    Opis:
    The article presents an approach to formulating a ship control process model in order to solve the problem of determining a safe ship trajectory in collision situations. Fuzzy process properties are included in the model to bring it closer to reality, as in many situations the navigator makes a subjective decision. A special neural network was used to solve the presented problem. This artificial neural network is characterized by minimum and maximum operations when set. In order to confirm the correctness of the operation of the proposed algorithm, the results of the simulations obtained were presented and an discussion was conducted.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 283--288
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Manewry wykonywane przez samolot podczas omijania ruchomej przeszkody dla wybranych scenariuszy
    Manoeuvres Performed by the Aircraft During Avoidance of a Moving Obstacle for the Selected Scenarios
    Autorzy:
    Graffstein, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/274749.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
    Tematy:
    unikanie kolizji
    scenariusze konfliktu
    procedury unikania kolizji
    numeryczna symulacja dynamika lotu
    collision avoidance
    conflict scenario
    obstacle avoidance procedure
    numerical simulation of flight dynamic
    Opis:
    W pracy zostały przedstawione zależności między zmiennymi opisującymi relacje zachodzące między samolotem a ruchomą przeszkodą. Sformułowano warunki określające możliwość wystąpienia zagrożenia w postaci kolizji. Drugim istotnym celem określenia zmiennych było stworzenie przesłanek do wyboru parametrów manewru antykolizyjnego i położenia samolotu, w którym konieczne jest rozpoczęcie manewru. Przeanalizowano różne scenariusze ruchu samolotu i przeszkody oraz ich wzajemnego usytuowania. Zaproponowano strukturę procesu wyboru parametrów odpowiedniego manewru antykolizyjnego. Rozważania zostały zilustrowane przykładami komputerowej symulacji lotu samolotu w czasie omijania ruchomej przeszkody.
    The article presents the relations describing variables between an aircraft and a moving obstacle. Conditions determining the threat of possible collision were formulated. The second important task for determining these variables was to create prerequisites for selection of anti collision manoeuvre and position of the aircraft where the manoeuvre is to be started. Various scenarios of the motion of the aircraft and obstacle as well as their relative positions were analysed. The structure of the process of searching for the parameters of the appropriate anti collision manoeuvre was proposed. Discussion is illustrated by the examples of computer simulations of flight of the aircraft when passing by a moving obstacles.
    Źródło:
    Pomiary Automatyka Robotyka; 2015, 19, 2; 19-24
    1427-9126
    Pojawia się w:
    Pomiary Automatyka Robotyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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