Concept of a Modem Manoeuvre Prediction System for Ships

Korte, Holger; Kachant, Hans-Dieter; Majohr, Jürgen; Buch, Thomas; Korte, Cathleen; Wulff, Matthias

doi:10.1016/s1474-6670(17)35080-2

Cited by 2 publications

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“…Therefore, it is reasonable to measure and use flow speed at the layer within which the net extends, and to assume that the speed never changes within this layer. In future studies, application of an acoustic Doppler current profiler (ADCP) in combination with a local flow field model, such as described by Korte et al 20 . in predicting ship maneuvers in the Baltic Sea, could successfully supplement our application.…”

Section: Discussionmentioning

confidence: 99%

Application of NaLA, a fishing net configuration and loading analysis system, to bottom gill nets

et al. 2007

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The net-shape and loading analysis system (NaLA) was developed to determine fishing net configuration and load in a previous study. The system has since been applied to general gill nets and aquaculture nets, and its validity has been proven through model experiments in tanks. In this study, the system was applied to estimate the dynamic behavior of a bottom gill net for walleye pollock, to test the system's applicability of the system to gear operations in the field. To obtain in situ data, four bottom gill net operations were performed in February 2004 off the coast of Sawara, Hokkaido, Japan. During operations, vertical displacements of the bottom gill net's float and sinker lines were measured as representative values of gear behavior, and ocean current direction, and speed at the gear position were observed simultaneously. Then, bottom gill net behavior was simulated using NaLA, incorporating observed environmental conditions and gear specifications. The resulting calculated behavior was compared to measured behavior in terms of the relationship between net height and environmental or setting conditions. Agreement between the calculated and measured net behavior was found. Thus, it is believe that our NaLA calculation model has the potential to simulate the dynamic behavior of bottom gill nets in situ.

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Section: Discussionmentioning

confidence: 99%

Application of NaLA, a fishing net configuration and loading analysis system, to bottom gill nets

et al. 2007

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“…The MAPSYS project ("Manoeuvre Prediction System for Ships") aimed at improving the nautical safety of ships in confined waters and harbor approaches with major current gradients by developing a prediction system using external current measurements (Korte et al, 2001). The vessel "Transeuropa", a ro-ro/passenger ferry of the Finnlines Group built in 1995, was examined during this project (L pp = 171.3 m, ∇ = 11, 646 DWT, u 0 = 21 kts).…”

Section: Maneuver Prediction Of Shipsmentioning

confidence: 99%

Influence of Ship Motion Nonlinearities on the Course Controller Design

Graswald

Korte

Lampe

2005

IFAC Proceedings Volumes

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Since a ship yard usually provides insufficient data for developing a ship control system, the course and track controller design is based upon a Nomoto model determined with a Clarke estimation of hydrodynamic derivatives. Several ships examined show a poor system performance with a course control derived from these models besides parameter identification problems of adaptive control concepts. Hence, the steering quality of the Mariner class is discussed and linear model parameters are obtained by an interval approximation of Dieudonné's spiral curve in the working range of the rudder. This approach leads to a better controlled nonlinear process.

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Concept of a Modem Manoeuvre Prediction System for Ships

Cited by 2 publications

References 0 publications

Application of NaLA, a fishing net configuration and loading analysis system, to bottom gill nets

Application of NaLA, a fishing net configuration and loading analysis system, to bottom gill nets

Influence of Ship Motion Nonlinearities on the Course Controller Design

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