Recently, the fourth industrial revolution has resulted in a paradigm shift to the development of information and communication technology and smart technology, which has extended to the shipbuilding industry worldwide. The Korean shipbuilding industry employs a high level of smart application technology, smart production technology, and smart ship platforms, which have been extended to all areas in the value chain, resulting in relatively high added value. The project "The Smart K-Yard" was conceived to achieve growth in the productivity of Korean small and mediumsized shipyards. This project is necessary to eliminate elements of waste and minimize the work force, thereby reducing the production lead-time and enhancing the quality of intelligent and smart shipbuilding production system. The project uses automation technology and simulation-based test bed for the shipbuilding processes. It has five work packages: 1) intelligent shipbuilding production design platform, 2) shipbuilding process automation technology, 3) shipyard operational efficiency improvement technology, 4) simulation-based virtual production platform, and 5) Smart K-yard supporting and training center using digital twin and cyber-physical system to improve and maintain the level of skills. In this paper, the development of unmanned vessels control system as part of future ships in South Korea is introduced. The system is divided into the hull, propulsion system, steering system, control system, and power system. The main controller for the engine, waterjet, and power has been developed. Moreover, the reliability and usefulness of the systems were verified using test beds and water tank testing. We plan to continue the development of advanced technology for unmanned vessel, including determining the appropriate safety improvement method to be implemented in the event of damage caused by abnormal condition and operator's negligence during operation and maintenance of equipment as an unmanned vessel is equipped with more communication related devices and electronic equipment than a manned vessel. Technological cooperation for future ships focusing on industrial internet of things (lloT) sensor technology, robotic system, and unmanned vessels is increasingly necessary among different countries. As such, we highlighted the need to increase information technology cooperation between research institutes, universities, and relevant companies in Finland in response to the fourth industrial revolution of shipbuilding industry.
The purpose of this study is to determine the correct estimation of laminate patterns for high-strength composites applied to a ship. Recently, the need for developing a ship component has been increasing to improve the capability of maritime operations. Composites with excellent specific strength and specific stiffness are emerging as next-generation materials. In the composite material, the mechanical properties vary depending on the laminated pattern of the reinforcing material. Therefore, in this study, the properties of the composite materials were calculated using the computer simulation program. The ply calibration performance results show that the initial values of the mechanical properties of the carbon/epoxy composites in the E11 direction are higher than the calculated values, and the remaining values are the same. The laminate mechanics results show that the tensile strength in the S11T direction was 1515 MPa, which is almost the same as the initial value of 1500 MPa.
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