Wszystkie pola: “target” - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A study of optimization of Alpha-Beta-Gamma-Eta filter for tracking a high dynamic target
Autorzy:: Jeong, T.
Pan, B.F.
Njonjo, A.W.
Powiązania:: https://bibliotekanauki.pl/articles/116199.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: integrated navigation
Alpha-Beta-Gamma filter
Kalman filter
high dynamic target
ships tracking
target dynamics
Jerky Model
ARPA
Opis:: The tracking filter plays a key role in accurate estimation and prediction of maneuvering vessel’s position and velocity. Different methods are used for tracking. However, the most commonly used method is the Kalman filter and its modifications. The Alpha-Beta-Gamma filter is one of the special cases of the general solution pro-vided by the Kalman filter. It is a third order filter that computes the smoothed estimates of position, velocity and acceleration for the nth observation, and also predicts the next position and velocity. Although found to track a maneuvering target with a good accuracy than the constant velocity, Alpha-Beta filter, the Alpha-Beta-Gamma filter does not perform impressively under high maneuvers such as when the target is undergoing changing accelerations. This study, therefore, aims to track a highly maneuvering target experiencing jerky motions due to changing accelerations. The Alpha-Beta-Gamma filter is extended to include the fourth state that is, constant jerk to correct the sudden change of acceleration in order to improve the filter’s performance. Results obtained from simulations of the input model of the target dynamics under consideration indicate an improvement in performance of the jerky model, Alpha-Beta-Gamma-Eta, algorithm as compared to the constant acceleration model, Alpha-Beta-Gamma in terms of error reduction and stability of the filter during target maneuver.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 49-53
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:: The Risk of Collision Assessment with Grapphic Forms of Target Data Presentation Use
Autorzy:: Juszkiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/320877.pdf
Data publikacji:: 2018
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: ARPA
safety of navigation
tracking
target data presentation
IMO performance standards
Opis:: Guarantee of the ship safety is the primary task posed for modern navigation systems. This concerns monitoring the proper ship position as well as providing accurate information about the collision threat. The proper interpretation of this information belongs to the navigator. He must take into account many variables affecting the assessment of the situation and then make the right decision regarding anti-collision manoeuvres. This assessment could be made easier for him with use some form of graphic target data presentation methods other than currently required and described in IMO performance standards. Other possible graphic presentation methods of collision information are described in the article along with the concept of their usage.
Podstawowym zadaniem stawianym przed nowoczesnymi systemami nawigacyjnymi jest zapewnienie bezpieczeństwa statku. Dotyczy to zarówno konieczności właściwej kontroli pozycji statku jak i dostarczenia rzetelnej informacji o zagrożeniu kolizyjnym. Właściwa interpretacja tej informacji należy do nawigatora. Musi on uwzględnić wiele zmiennych czynników mających wpływ na ocenę sytuacji, a następnie podjąć właściwą decyzję odnośnie podejmowanych manewrów antykolizyjnych. Możliwość zastosowania innej formy graficznej prezentacji informacji niż wymagana obecnie przez przepisy może ułatwić mu taka ocenę. W artykule przedstawione zostały inne sposoby graficznej prezentacji informacji kolizyjnej wraz z koncepcją ich wykorzystania.
Źródło:: Annual of Navigation; 2018, 25; 27-39
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of the form of presentation of graphic-tracked target data – sectors of dangerous courses
Autorzy:: Juszkiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/135569.pdf
Data publikacji:: 2018
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: ARPA
safety of navigation
radar tracking
target data presentation
sector of danger
IMO performance standards
Opis:: At present, providing a clear presentation of the navigational situation around a navigator’s own ship (OS) is one of the most important issues facing device manufacturers. Integration of navigational devices on the bridge has made it possible to transfer information and present it in the form chosen by the navigator screen. However, this may cause a decrease in the clarity of information and hamper its interpretation. The ability to select the best information, and that which is most needed at a given moment, depends on navigator proficiency. Vectors are still the basic form of the graphic presentation of radar-tracked object data. However, the ability to track more objects at the same time in crowded areas results in a decrease in readability and can cause errors. This article introduces the possibility of presenting information about collision danger in the form of Dangerous Courses Sectors (DCS) together with an analysis of changes in these during typical ship encounter situations. DCS are calculated on the base of Dangerous Passing Areas (DPA) as bearings on the marginal points of these areas.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 53 (125); 68-73
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The Influence of the Ship Yawing on the Target Tracking Process
Autorzy:: Juszkiewicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/320534.pdf
Data publikacji:: 2008
Wydawca:: Polskie Forum Nawigacyjne
Tematy:: ARPA
śledzenie radarem
radar tracking
Opis:: Precision of the data obtained in the object tracking process performed by the ARPA systems, depends very much on weather conditions. Main factors resulting from bad weather conditions and having an influence on the precision of object tracking process are ship's rolling and yawing. Results of the experiment conducted in the ARPA simulator, whose objective was to define tracking errors resulting from ship yawing, are presented in this paper.
Źródło:: Annual of Navigation; 2008, 13; 67-74
1640-8632
Pojawia się w:: Annual of Navigation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Evaluation method of collision risk by using true motion
Autorzy:: Imazu, H.
Powiązania:: https://bibliotekanauki.pl/articles/117062.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: collision risk
true motion
ships manoeuvering
Closest Point of Approach (CPA)
ARPA
Line of Predicted Collision (LOPC)
Obstacle Zone by Target (OZT)
Automatic Identification System (AIS)
Opis:: It is necessary to develop a useful application to use big data like as AIS for safety and efficiency of ship operation. AIS is very useful system to collect targets information, but this information is not effective use yet. The evaluation method of collision risk is one of the cause disturb. Usually the collision risk of ship is evaluated by the value of the Closest Point of Approach (CPA) which is related to a relative motion. So, it becomes difficult to find out a safety pass in a congested water. Here, Line of Predicted Collision (LOPC) and Obstacle Zone by Target (OZT) for evaluation of collision risk are introduced, these values are related to a true motion and it became visible of dangerous place, so it will make easy to find out a safety pass in a congested water.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 1; 65-70
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: 6.

Tytuł:: Comparative Study of the Accuracy of AIS and ARPA Indications. Part 1. Accuracy of the CPA Indications
Autorzy:: Wawruch, R.
Powiązania:: https://bibliotekanauki.pl/articles/117390.pdf
Data publikacji:: 2018
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Automatic Identification System (AIS)
ARPA
Closest Point of Approach (CPA)
accuracy
CPA Accuracy
comparative study
radar tracking
AIS target
Opis:: According to the IMO recommendation when the target data from radar tracking and AIS are both available and the association criteria are fulfilled such that the radar and AIS information are considered as for one physical target, then as a default condition in radar equipment should be automatically selected and displayed the AIS target symbol and the alphanumerical AIS target data only. The article presents research conducted in real sea conditions on the reliability of information presented by the ship's AIS and ARPA about the passing distance with the other vessel tracked by radar equipment and fitted with AIS.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 439-443
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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