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For the problem of sail-assisted ship prone to track deviation influenced by wind and other disturbances, a fuzzy adaptive iterative sliding mode control method is presented. The evaluation function is introduced into fuzzy control scheme to evaluate and adjust the designed parameters online. Under the proposed method, the estimation of the uncertain parameters and disturbances can be avoided, moreover,...
The block logistics in shipyard accounts for a considerable proportion of the production cost. And further, it used to effects serious delays on the shipbuilding processes in typical cases. However, the planner hardly incorporate the logistics into serious consideration due to its various restriction at the stage of production planning. In this paper, a simulation-based ship block logistics support...
Reliable and accurate short-term prediction of ship motions improves the safety in ship motion related maritime operations, where the empirical mode decomposition (EMD) is widely used for its advantages like the satisfactory nonlinear and non-stationary processing capability. Therefore a hybrid autoregressive AR-DWT-EMD model is proposed for the short-term prediction of non-stationary and nonlinear...
In the service-oriented paradigm web service interfaces are considered contracts between web service subscribers and providers. However, these interfaces are continuously evolving over time to satisfy changes in the requirements and to fix bugs. Changes in a web service interface typically affect the systems of its subscribers. Therefore, it is essential for subscribers to recognize which types of...
Este trabalho descreve um procedimento de projeto e otimização desenvolvido para determinar as caracterÃsticas principais e uma representação preliminar da superfÃcie do casco de um navio de gás natural comprimido (CNG) armazenado em cilindros verticais, com capacidade total de carga de 1, 6M de metros cúbicos normais (CNTP), velocidade de serviço de 15 nós e projetado para operar no escoamento...
The Virtual Region More was a research project to investigate how to utilize visualization and simulation methods as planning tools for research and teaching in the More region on the west coast of Norway. The project was developed using a bottom-up process to integrate multi-agents in large 3D terrain models. The Virtual Region More became an arena for testing agent models in shipping, fish farming,...
This paper develops an adaptive fuzzy course controller with rudder dynamics. The ship model is described by a third order nonlinear model with unknown parameters and unknown virtual control gain function. The Takagi-Sugeno (T-S) type fuzzy systems are used to approximate unknown system functions and a systematic design procedure is developed by combining dynamic surface control (DSC) technique. With...
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