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LNG 벙커링용 ESD 밸브의 동특성 모델링 및 제어기 설계
박주연(J. Y. Park),김학수(H. S. Kim),배지원(J. W. Bae),최지아(J. A. Choi),지상원(S. W. Ji),장지성(J. S. Jang) 유공압건설기계학회 2019 유공압건설기계학회 학술대회논문집 Vol.2019 No.11
Natural gas is one of the fuels what produce low levels of NOx and less CO₂. It is a colorless mixture of several gases, and when the temperature drops below -196℃ at atmospheric pressure, methane vapor becomes a liquid what is called Liquid natural gas. Since liquid natural gas is cryogenic liquid, it is likely to lead to a big accident if leaked. Therefore, emergency shut-down valve should be installed to cope with emergency situations. In this study, the numerical modeling of the LNG bunkering ESD valve, which is the emergency shut-down valve, was carried out and the dynamic characteristic were verified. Also, a sliding mode control has been applied to provide remote control in an emergency.
이종성(J. S. Lee),강덕원(D. W. Kang),박주연(J. Y. Park),박지웅(J. W. Park) 한국도시철도학회 2016 한국도시철도학회논문집 Vol.4 No.2
The control technology of signaling system has been progressed from wayside control based on the existing track circuit to carborne control on which the wireless communication based lately. Since the 2000s, the development of RF-CBTC (Frequency - Communication Based Train Control) signaling system to enable safety control of train has been complete, and commercialized in the world due to the high technology of wireless communication. Therefore, the signaling system based on RF-CBTC has been successfully developed, enabling commercialization by localization. In addition, recently, driverless train control signaling system of MBS (Moving Block System) has also been developed to enhance operation efficiency and headway, and it is waiting for a chance to apply another commercialization line in Korea. In this paper, the present condition and the commercialization case of RF-CBTC signaling system development localized in Korea will be described.