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고장진단 기능을 갖는 선박 횡동요 감요 장치 용 제어시스템 개발
원문철(Moon-Cheal Won),류상현(Sang-Hyun Ryu),최광식(Kwang-Sik Choi),정윤호(Yun-Ho Jung),류재문(Jae-Moon Lew),지용진(Yong-Jin Ji) 한국해양공학회 2010 韓國海洋工學會誌 Vol.24 No.3
This paper summarizes the development of an ART control system panel with a touch screen and sensors to measure the roll and roll rate of ships. The control system hardware consists of two micro-processors, analog and digital I/O circuits, various relay circuits, etc. Sensor fusion and moving cross algorithms are implemented to accurately estimate the roll angle and roll period. In addition, the control system adapts a fault detection algorithm to inform users of ART system faults. A touch screen in the control panel can display the ART system states and faults. The performance of the developed system was verified on real sea trials.
안병권(BYUNG-KWON AHN),류재문(JAE-MOON LEW),이현엽(HYUN-YUP LEE),이창섭(CHANG-SUP LEE) 한국해양공학회 2008 韓國海洋工學會誌 Vol.22 No.5
A B-spline based high order panel method was developed for the motion of bodies in an ideal fluid, either of infinite extent or with a free boundarysurface. In this method, both the geometry and the potential are represented by the B-spline, which guarantees more accurate results than most potential based low order methods. In the present work, we applied this B-spline based high order method to the radiation problem of floating bodies. The boundary condition on the free surface was satisfied by adopting a Kelvin-type Green function and irregular frequencies were removed by placing additional control points on the free surface surrounding the body. The numerical results were validated by comparison with existing numerical and experimental results.
BBDB형 진동수주 파력발전장치의 운동 및 파랑표류력 연구
김진하(JIN-HA KIM),류재문(JAE-MOON LEW),홍도천(DO-CHUN HONG),홍석원(SEOK-WON HONG) 한국해양공학회 2006 韓國海洋工學會誌 Vol.20 No.2
The motion and wave drift forces of floating BBDB (backward-bent duct buoy) wave energy absorbers in regular waves are calculated, taking account of the oscillating surface-pressure due to the pressure drop in the air chamber above the oscillating water column,within the scope of the linear wave theory. A series of model tests has been conducted in order to verify the motion and time mean wave drift force responses in regular waves at the ocean engineering basin, MOERI/KORDI. The pneumatic damping through an orifice-type duct for the BBDB wave energy device are deducted from experimental research. Numerical simulation for motion and drift force responses of the BBDB wave energy device, considering pneumatic damping coefficients, has been carried out, and the results are compared with those of model tests.