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정세용(Se-Yong Jeong),노명일(Myung-Il Roh),신현경(Hyun-Kyoung Shin),하솔(Sol Ha),구남국(Nam-Kug Ku) (사)한국CDE학회 2013 한국CDE학회 논문집 Vol.18 No.6
In the case of a floating offshore structure such as FPSO(Floating, Production, Storage, and Offloading unit), many equipment should be installed in the limited space, as compared with an onshore structure. Recently, the requirement for an optimal layout method of the structure has been raised. Thus, a layout method of the floating offshore structure was proposed in this study. First, an optimization problem for layout design was mathematically formulated, and then an optimization algorithm was implemented based on the genetic algorithm in order to solve it. To evaluate the applicability of the proposed method, it was applied to examples ofFPSO topsides and an offshore wind turbine. As a result, it was shown that the proposed method can be applied to layout design of the floating offshore structure.
최적화 기법을 이용한 FPSO 상부 구조 모듈의 배치 방법 연구
정세용(Se-Yong Jeong),노명일(Myung-Il Roh),신현경(Hyun-Kyoung Shin) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1
A layout of a FPSO should be elaborately determined as compared with that of an onshore plant because many topside process systems are installed on the limited area; the deck of the FPSO. In this study, a layout for the topside modules was determined by using the optimization technique. For this, an optimization problem for the topside layout was mathematically formulated. The problem consists of 252 design variables representing the positions of topside process systems, 53 equality constraints and 144 inequality constraints representing limitations on the layout of them, and an objective function representing the total layout cost. To solve the problem, a hybrid optimization method that consists of the genetic algorithm(GA) and sequential quadratic programming(SQP) was used in this study. As a result, we can obtain a layout for the topside modules of the FPSO which satisfies all constraints related to limitations on the layout.
이정필(Jeong-Phil Lee),한상철(Snag-Chul Han),한영희(Young-Hee Han),박병철(Byeong-Cheol Park),정세용(Se-Yong Jung),박병준(Byung-Jun Park),성태현(Tae-Hyun Sung) 대한전기학회 2009 대한전기학회 학술대회 논문집 Vol.2009 No.7
본 논문은 초전도 플라이휠 에너지 저장장치 (Superconductor Flywheel Energy Storage System : SFES)의 고속회전 시험을 통하여 휠의 진동 특성을 평가 하였다. 초전도 베어링(Superconductor Magnetic Bearing : SMB)은 동작시키기 않고 플라이 휠의 외부 외란이나 예측하지 못한 진동을 억제할 수 있도록 설치된 전자석 댐퍼(Electric Magnetic Damper : EMD) 만을 이용해 휠을 부양하고 고속회전 시험을 수행하였다. 이를 통하여 플라이휠의 고속 회전 운전영역에서 EMD는 충분한 진동억제 능력을 보임을 확인 하였다.
이정필(Jeong-Phil Lee),한상철(Sang-Chul Han),박병철(Byeong-Cheol Park),한영희(Young-Hee Han),박병준(Byung-Jun Park),정세용(Se-Yong Jung) 대한전기학회 2009 전기학회논문지 Vol.58 No.9
In this paper, 5 ㎾h class Superconductor Flywheel Energy Storage System (SFES) was constructed including motor/generator, superconductor magnetic bearing(SMB), composite rotor and electromagnetic damper(EMD) system. High speed rotation test was performed after levitating flywheel rotor only using EMD without SMB. the PD controller of EMD was designed. the control system is constructed using xPC which is real time digital control system. the results of high speed rotation test showed that proposed EMD system have sufficient damping in cylindrical mode and conical mode, and vibration of wheel was suppressed below 10 ㎛.
전동/발전기 코어에 의한 초전도 플라이휠 에너지 저장장치의 회전손실 특성 평가
李丁必(Jeong-Phil Lee),韓塋熙(Young-Hee Han),丁世庸(Se-Yong Jung),韓相哲(Sang-Chul Han),鄭年縞(Nyeon-Ho Jeong),成台鉉(Tae-Hyun Sung) 대한전기학회 2007 전기학회논문지 Vol.56 No.10
In this paper, the rotational loss of the superconductor flywheel energy storage system (SFES) by motor/generator stator core was assessed. To do this, the vertical axial type SFES with journal type superconductor bearing was manufactured. To quantitatively assess the rotational loss by the stator core, the rotational losses by superconductor bearing and the degree of a vacuum were measured. In case of variation of the inner radius and outer radius of the stator core, the rotational losses were measured. From the experimental results, It is confirmed that the rotational loss can be reduced by means of the optimal stator core design.
플라이휠 에너지 저장장치 자기부상 안정성 시뮬레이션 및 실험분석
박병철(Byeong-Cheol Park),정세용(Se-Yong Jung),한상철(Sang-Chul Han),이정필(Jeong-Phil Lee),한영희(Young-Hee Han),박병준(Byung-Jun Park) 대한전기학회 2010 전기학회논문지 Vol.59 No.9
In this paper , the relative stability of magnetic bearing system for the flywheel energy storage is evaluated using both simulation and experimental analysis. We make the simulation model for the magnetic bearing flywheel system using the rigid body shaft model. According to international standard ISO 14839-3, We experimentally analyzed the relative stability of magnetic bearing system . Additionally using both the simulation model and experimental tests, Phase margin and Gain margin is acquired through Nyquist plot.
박병철(Byeong-Cheol Park),정세용(Se-Yong Jung),한상철(Sang-Chul Han),이정필(Jeong-Phil Lee),한영희(Young-Hee Han),박병준(Byung-Jun Park) 한국트라이볼로지학회 2011 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.27 No.3
In this paper, an actuator model of the thrust magnetic bearing for the flywheel energy storage is derived using magnetic circuit theory, And we compared this result with finite element magnetic field analysis result. Based on the actuator model, we made a simulation model of the thrust magnetic bearing system. We showed the closed loop transfer function and sensitivity function of the thrust magnetic bearing system using both the simulation model and the experiment. The experimental result at rotation velocity 18,00rpm of thru t magnetic bearing system is included.
부하-강도 분석을 이용한 격막형 펄스분리장치의 내열강도에 대한 신뢰성 예측 사례연구
이동원(Dong-Won Lee),정세용(Se-Yong Jeong),이방업(Bang-Eop Lee),정규동(Gyoo-Dong Jung),박부희(Boo-Hee Park),안동근(Dong-Geun An),장중순(Joong-Soon Jang) 한국신뢰성학회 2015 신뢰성응용연구 Vol.15 No.2
A stress-strength analysis is used to assess the reliability of a multi-pulse rocket motor system. Main stress is found to be thermal during explosion and the distribution is obtained by simulation. The strength distribution is derived from the results of actual specimen tests. The failure rate of barrier type pulse separation device is estimated.