Temat: position errors - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Simulation modeling for evaluation of efficiency of observed ship coordinates
Autorzy:: Vorokhobin, I.
Burmaka, I.
Fusar, I.
Burmaka, O.
Powiązania:: https://bibliotekanauki.pl/articles/2172471.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: ship coordinates
observed ship coordinates
simulation modeling
lines of position
LOP errors
method of least squares
Opis:: Simulation computer modeling was used to evaluate the efficiency of the vessel’s observed coordinates using the mixed laws of distribution errors of the first and second type for lines of position (LOP). Simulation modeling showed good convergence of evaluation of efficiency calculated by analytical expressions and obtained by simulation. A graphical depiction of the observed points’ deviation relative to the mathematical expectation in the case of distribution of LOP errors of both types according to mixed laws is obtained by the method of least squares and the method of maximum likelihood estimation.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2022, 16, 1; 137--141
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A Study on the Errors in the Free-Gyro Positioning and Directional System
Autorzy:: Jeong, T.
Powiązania:: https://bibliotekanauki.pl/articles/117640.pdf
Data publikacji:: 2014
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Position Accuracy
Gyrocompass
Free-Gyro Positioning
Directional System
Attitude Errors
Inertial Measurement Unit (IMU)
FDOP
inertial navigation system (INS)
Opis:: This paper is to develop the position error equations including the attitude errors, the errors of nadir and ship’s heading, and the errors of ship’s position in the free-gyro positioning and directional system. In doing so, the determination of ship’s position by two free gyro vectors was discussed and the algorithmic design of the free-gyro positioning and directional system was introduced briefly. Next, the errors of transformation matrices of the gyro and body frames, i.e., attitude errors, were examined and the attitude equations were also derived. The perturbations of the errors of the nadir angle including ship’s heading were investigated in each stage from the sensor of rate of motion of the spin axis to the nadir angle obtained. Finally, the perturbation error equations of ship’s position used the nadir angles were derived in the form of a linear error model and the concept of FDOP was also suggested by using covariance of position error.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 2; 175-181
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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