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Estimation of the roll hydrodynamic moment model of a ship by using the system identification method and the free running model test

Authors
Yoon, Hyeon KyuSon, Nam SunLee, Gyeong Joong
Issue Date
10월-2007
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Keywords
free running model (FRM) test; hydrodynamic coefficient; roll moment model; system identification method
Citation
IEEE JOURNAL OF OCEANIC ENGINEERING, v.32, no.4, pp 798 - 806
Pages
9
Journal Title
IEEE JOURNAL OF OCEANIC ENGINEERING
Volume
32
Number
4
Start Page
798
End Page
806
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/1399
DOI
10.1109/JOE.2007.909840
ISSN
0364-9059
1558-1691
Abstract
When a fast container ship or a naval vessel turns, accompanying roll motions occur. This roll effect must be considered in the horizontal equations of the motion of the ship to predict the maneuverability of the ship properly. In this paper, a new method for determining a model structure of the hydrodynamic roll moment acting on a ship and for estimating the hydrodynamic coefficients is proposed. The method utilizes a system identification technique with the data from sea trial tests or from free running model (FRM) tests. To obtain motion data that is applied to the proposed algorithm, an FRM of a large container ship was developed. Using this model ship, standard maneuvering tests were carried out on a small body of water out of doors. A hydrodynamic roll moment model was constructed utilizing the data from turning circle tests and a 20 - 20 zig - zag test. This was then confirmed through a 10 - 10 zig - zag test. It was concluded that a model structure of the hydrodynamic roll moment model could be established without difficulty through a system identification method and FRM tests.
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