Journal of Marine Science and Technology

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A fuzzy rule-based PID controller for dynamic positioning of vessels in variable environmental disturbances
Journal of Marine Science and Technology - - 2020
Shuang Xu, Xuefeng Wang, Jie Yang, Lei Wang
Hull-form optimization using parametric modification functions and particle swarm optimization
Journal of Marine Science and Technology - Tập 21 - Trang 129-144 - 2015
Hee-Jung Kim, Jung-Eun Choi, Ho-Hwan Chun
The focus of this paper is on devising designer-friendly hull-form variations coupled with optimization algorithms. Hull-form variations are carried out through parametric modification functions. Two kinds of representative optimization algorithms are considered here. One is the well-known sequential quadratic programming which is the derivative based. The other is particle swarm optimization whic...... hiện toàn bộ
Surface intersection in geometric modeling of ship hulls
Journal of Marine Science and Technology - Tập 17 - Trang 114-124 - 2011
Manuel Ventura, C. Guedes Soares
In this work a methodology is presented for the computation of the intersection of parametric surfaces, namely Non Uniform Rational B-Splines (NURBS), with special attention to some specific requirements for applications to ship hull modeling. The algorithm adopted and the steps of the proposed method are described, namely checking whether the surfaces intersect, preprocessing of linear surfaces w...... hiện toàn bộ
Use of a 3D compartment model for simplified full ship FE model. Part II: validation of the simplified FE model
Journal of Marine Science and Technology - Tập 13 Số 4 - Trang 408-415 - 2008
Beom-Seon Jang, Jaehoon Jung, Yong-Suk Suh
Development of ship weather routing system with higher accuracy using SPSS and an improved genetic algorithm
Journal of Marine Science and Technology - Tập 26 - Trang 1324-1339 - 2021
Chong Pan, Zhanshuo Zhang, Weikang Sun, Jun Shi, Hongbo Wang
Fuel consumption is an important factor to be considered in the process of weather routing. How to choose an appropriate route according to the requirements is particularly important. This paper proposes a method to optimize the ship weather routing. Based on the original genetic algorithm, the trigonometric function selection operator is introduced, the mutation operator is improved to increase t...... hiện toàn bộ
Simplification of mooring line number for model testing based on equivalent of vessel/mooring coupled dynamics
Journal of Marine Science and Technology - Tập 25 - Trang 573-588 - 2019
Mingxiao Liang, Shengwen Xu, Xuefeng Wang, Aibing Ding
To decrease the complexity of experimental setup that often results in low reliability of the experimental results for typical offshore floating structures with increasingly excessive mooring lines, a mooring line number simplification methodology is proposed based on equivalent of the vessel/mooring coupled dynamics for vessel with original and simplified mooring systems. The Non-dominated Sortin...... hiện toàn bộ
On nonlinear ship waves and wave resistance calculations
Journal of Marine Science and Technology - Tập 4 - Trang 7-15 - 1999
Daohua Zhang, Allen T. Chwang
A finite difference method based on the Euler equations is developed for computing ship waves and wave resistances. Time marching is carried out using a time-splitting fractional-step method. The second-order central difference is used to discretize the spatial differentials, while the convection terms are discretized by the QUICK scheme. A body- and free-surface-fitted grid system with a cell-ce...... hiện toàn bộ
Experimental and numerical investigations of the flow around an oar blade
Journal of Marine Science and Technology - Tập 13 - Trang 1-15 - 2008
Alban Leroyer, Sophie Barré, Jean-Michel Kobus, Michel Visonneau
This article aims at verifying the capabilities of a Reynolds-Averaged Navier-Stokes Equations (RANSE) solver (ISIS-CFD, developed at the Fluid Mechanics Laboratory of Ecole Centrale de Nantes [LMF]) to accurately compute the flow around an oar blade and to deduce the forces on it and other quantities such as efficiency. This solver is structurally capable of computing the flow around any blade sh...... hiện toàn bộ
Path following of under-actuated ships based on model predictive control with state observer
Journal of Marine Science and Technology - Tập 26 - Trang 408-418 - 2020
Zongxuan Li, Ronghui Li, Renxiang Bu
A model predictive control (MPC) method with linear extended state observer (LESO) is presented to address the problems of the input constraints, uncertain parameters and external disturbances for path following of under-actuated surface ships without velocity measurements. The line of sight (LOS) guidance algorithm is employed to convert the path following into the heading control flexibly. The p...... hiện toàn bộ
Robust path-following control of the underactuated AUV with multiple uncertainties using combined UDE and UKF
Journal of Marine Science and Technology - Tập 28 - Trang 804-818 - 2023
Jianming Miao, Wenchao Liu, Chao Peng, Xingyu Sun
In the complex ocean environment, the autonomous underwater vehicle (AUV) is subject to the multiple uncertainties including deterministic uncertainties and stochastic uncertainties, which greatly degrade the control performance. To solve this problem, a novel robust control strategy using combined uncertainty and disturbance estimator (UDE) and unscented Kalman filter (UKF) is proposed for the pa...... hiện toàn bộ
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