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공리적 설계를 적용한 심해저 망간단괴 집광시스템의 설계평가
최종수,홍섭,김형우,여태경,이태희,Choi, Jong-Su,Hong, Sup,Kim, Hyung-Woo,Yeu, Tae-Kyung,Lee, Tae-Hee 한국해양학회 2008 바다 Vol.13 No.3
The conceptual design evaluation of Deep-Sea Manganese Nodule Miner(DSNM) based on Axiomatic Design was preformed. Functional Requirements(FRs) in functional domain and Design Parameters(DPs) in physical domain were embodied for the given concept design of DSNM. Interactions between FRs and DPs were sequentially analyzed from the first level hierarchy to the lower level hierarchy. The interactions were expressed as design matrices which showed the dependence or independence between FRs and DPs. The results showed that the design of DSNM was not a coupled one, but a decoupled. Finally, it was conceptually verified that DSNM was a good design satisfying the independence axiom of the Axiomatic Design. 심해저 망간단괴 집광시스템(이하, 집광시스템)의 개념설계가 공리적 설계(Axiomatic Design)의 관점에서 평가되었다. 또한 이미 수행된 집광시스템의 개념설계에 대해 기능적 영역의 기능요구와 물리적 영역의 설계파라미터가 구체화되었다. 기능요구와 설계파라미터의 상호관계는 첫 번째 수준 계층에서 하위 수준 계층으로 순차적으로 분석되었다. 이러한 상호관계는 설계행렬의 형태로 표현되었고 기능요구와 설계파라미터 사이의 독립성을 판단하기 위한 지표로 사용되었다. 설계행렬의 분석결과 본 집광시스템은 설계파라미터간에 연성이 되지 않는 비연성화된 설계임이 확인되었다. 결과적으로, 본 집광시스템은 독립공리(Independence Axiom)를 만족하는 잘된 설계임이 개념적으로 입증되었다.
2자유도 서보제어기를 이용한 크레인의 Anti-Sway 제어
이진우(Jin Woo Lee),여태경(Tae Kyung Yeu),안휘웅(Hui Ung An),김상봉(Sang Bong Kim) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.4
In designing the anti-sway controller for crane system in the industrial field, one of the basic problem is to keep the stability of system, even if the mathematical model of the plant is not exact and disturbance exists. From this point of view, a two-degree-of-freedom(2DOF) servo controller has influnce on the system in which the integral compensation is effective only when a modeling error and/or a disturbance input exist. In this paper, the change of load weight and the variation of wire rope length considered as the structured uncertainty, and we design the 2DOF servo controller using independently the informations of reference signal and control output with both feedforward and feedback. The effectiveness is proved through the results for the anti-sway system in the system with the position control of trolley.
다물체 동역학을 이용한 양광펌프 거치대의 유압 실린더 설계 및 구조 안전성 평가
오재원(Jae-Won Oh),민천홍(Cheon-Hong Min),이창호(Chang-Ho Lee),홍섭(Sup Hong),김형우(Hyung-Woo Kim),여태경(Tae-Kyung Yeu),배대성(Dae-Sung Bae) 한국해양공학회 2015 韓國海洋工學會誌 Vol.29 No.2
When a deep-seabed lifting pump is kept this device has bending and deformation in the axis due to its long length(8m). These influences can be caused a breakdown. Therefore, a mounting must be developed to keep the lifting pump safe. This paper discusses the hydraulic cylinder design of the lifting pump and structural safety estimation of the mounting using SBD(simulation-based design). The multi-body dynamic simulation method is used, which has been used in the automotive, structural, ship building, and robotics industries. In this study, the position and diameter of the hydraulic cylinder were determined based on the results of the strokes and buckling loads for the design positions of the hydraulic cylinder. A structural dynamic model of the mounting system was constructed using the determined design values, and the structural safety was evaluated using this dynamic model. According to these results, this system has a sufficient safety factor to manufacture.
심해저 연약지반 무한궤도 주행장치의 크리깅 근사모델 기반 강건설계
최종수(Jong-Su Choi),정재준(Jae-Jun Jung),김형우(Hyung-Woo Kim),이태희(Tae Hee Lee),홍섭(Sup Hong),여태경(Tae-Kyung Yeu) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
The tracked vehicle of deep-sea manganese nodules miner travels on very cohesive soft soil of deep-sea floor. The performance of the tracked vehicle depends on both designation of control factors, namely design variables, and influence strength of uncontrollable noise factors, namely design parameters. In this paper, robust design methodology is applied to the design of the tracked vehicle in order to minimize the variability, or, variance of system performance from noise factors. The environmental and operational conditions such as shear strength of soil and vehicle travel speed are selected as noise factors in this study. The width of track, contract length and weight and position of C.O.G. for vehicle and buoyancy module are chosen as control factors. The sinkage, slip, pitch angle and torque are determined as system performance. The system performances are obtained using the single body vehicle dynamic simulation program, TRACSIM. Screening using L27 orthogonal array for control factors and noise factors is performed to minimize the number of control factors and noise factors. The kriging approximation model is performed in order to get effectively the response value for a design set using DACE (Design and Analysis of Computer Experiments) and MES (Maximum Entropy Sampling). Objective function is defined as the weighted summation for 4 kinds of mean and variance of system performance. Constraints are defined as 4 kinds of inequality constraints for summation of mean and variance of each system performance. Mean and variance are directly calculated from the kriging approximation model based on assumption on gaussian distribution of noise factors. Robust optimal solution is obtained by using nonlinear constrained algorithm. The robust solution is compared with classical optimization one.
이민욱(Minuk Lee),최종수(Jong-Su Choi),성기영(Ki-Young Sung),김성순(Seong-Soon Kim),김형우(Hyung-Woo Kim),여태경(Tae-Kyung Yeu),홍섭(Sup Hong) 한국해양환경·에너지학회 2012 한국해양환경·에너지학회 학술대회논문집 Vol.2012 No.5
In this paper, we suggest the optimum design approach for a box-shape pressure compensated vessure vessel that have plastic viewport equiped on the pilot mining robot The pressure compensated vessure vessel is a important part that protect electrical-electronic system from the high water pressure. These type of compensated pressure vessels have plastic viewport gennerally to check inner circumstance of electrical-electronic system. However, largely deformed flexible viewport causes additional tensile forces called prying farces to the bolted connection parts. To alliviate prying effect, the optimum design of structure reinforcement is conducted in this research.
이민욱(Minuk Lee),최종수(Jong-Su Choi),성기영(Ki-Young Sung),김성순(Seong-Soon Kim),김형우(Hyung-Woo Kim),여태경(Tae-Kyung Yeu),홍섭(Sup Hong) 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5
In this paper, we suggest the optimum design approach for a box-shape pressure compensated vessure vessel that have plastic viewport equiped on the pilot mining robot. The pressure compensated vessure vessel is a important part that protect electrical-electronic system from the high water pressure. These type of compensated pressure vessels have plastic viewport gennerally to check inner circumstance of electrical-electronic system. However, largely deformed flexible viewport causes additional tensile forces called prying forces to the bolted connection parts. To alliviate prying effect, the optimum design of structure reinforcement is conducted in this research.