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    Wyświetlanie 1-3 z 3
    Tytuł:
    VR teleoperation to support a GPS-free positioning system in a marine environment
    Autorzy:
    Lager, M.
    Topp, E. A.
    Malec, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1841575.pdf
    Data publikacji:
    2020
    Wydawca:
    Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
    Tematy:
    navigation systems
    autonomous surface vehicle
    graphical user interface
    Global Positioning System
    Global Navigation Satellite System
    unmanned ground vehicles
    terrain-aided navigation
    VR teleoperation
    Opis:
    Small autonomous surface vehicles (ASV) will need both teleoperation support and redundant positioning technology to comply with expected future regulations. When at sea, they are limited by a satellite communication link with low throughput. We have designed and implemented a graphical user interface (GUI) for teleoperation using a communication link with low throughput, and one positioning system, independent of the Global Positioning System (GPS), supported by the teleoperation tool. We conducted a user study (N=16), using real-world data from a field trial, to validate our approach, and to compare two variants of the graphical user interface (GUI). The users experienced that the tool gives a good overview, and despite the connection with the low throughput, they managed through the GUI to significantly improve the positioning accuracy.
    Źródło:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 4; 789-798
    2083-6473
    2083-6481
    Pojawia się w:
    TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Underwater terrain aided navigation based on acoustic imaging
    Autorzy:
    Song, Z.
    Bian, H.
    Zielinski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/331702.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Tematy:
    3D terrain model
    multi-beam bathymetry
    Opis:
    Underwater terrain aided navigation is applicable to underwater vehicles during long missions. It relies on a prior known ocean bathymetric map and collected in-situ sonar data to determine the position of the vehicle. The performance of the navigation system depends on the sea floor characteristics and algorithms that are used to match those two sets of data. In this paper, a novel idea was proposed to treat bathymetric maps and in-situ sonar data as images. A variety of existing algorithms developed for image processing can be applied to obtain position fixes. Textual features extraction, image interpolation and image registration were tested using available bathymetric data and synthesized sonar data as collected in-situ. Simulation results indicate that the chosen image analysis methods are capable of providing robust position fixes. The image characteristics extracted from the underwater terrain data are shown to be rotation and scale invariant. As the resolution of multi-beam bathymetry sonars keeps improving with technology advances, the use of image analysis techniques facilitates underwater terrain aided navigation for a wide range of new applications.
    Źródło:
    Hydroacoustics; 2015, 18; 153-160
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Construction method of the topographical features model for underwater terrain navigation
    Autorzy:
    Wang, L.
    Yu, L.
    Zhu, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/259976.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    Terrain Aided Navigation
    terrain features
    Terrain Navigation Information Content (TNIC)
    correlation
    Opis:
    Terrain database is the reference basic for autonomous underwater vehicle (AUV) to implement underwater terrain navigation (UTN) functions, and is the important part of building topographical features model for UTN. To investigate the feasibility and correlation of a variety of terrain parameters as terrain navigation information metrics, this paper described and analyzed the underwater terrain features and topography parameters calculation method. Proposing a comprehensive evaluation method for terrain navigation information, and constructing an underwater navigation information analysis model, which is associated with topographic features. Simulation results show that the underwater terrain features, are associated with UTN information directly or indirectly, also affect the terrain matching capture probability and the positioning accuracy directly.
    Źródło:
    Polish Maritime Research; 2015, S 1; 121-125
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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