• Journal of Ocean Engineering and Technology
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• v.33 no.3
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• pp.205-213
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• 2019

Recently, because of the global recession of the offshore plant industry and low-cost orders, there has been increasing interest in strengthening the competitiveness of domestic companies for the design and production technologies of offshore plants. However, in the offshore plant design field, the Plant Design Management System (PDMS), which is a 3D CAD program for plant layout developed by AVEVA Marine, is already commonly used as offshore plant design software and widely used in large domestic shipyards and cooperative design companies. Under this background, we have been thinking about ways to design better with the existing software. In this study, we developed a parametric design program to maximize the efficiency and reduce the working time for offshore plant electrical outfit production design based on the Programmable Macro Language (PML) of PDMS. We also examined its performance. By applying the developed program to the offshore plant module selected as an application example, it was confirmed that a 50% improvement in the work efficiency of cable tray design could be obtained compared with the existing method, with work efficiency improvements of 80% or more in other field design work.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.2
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• pp.632-637
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• 2019

The cable tray design of an offshore plant production design is to optimally arrange the 3D modeling so that the cable can be installed without interfering with the structural members and various outfit equipment, and it is performed using a PDMS (Plant design management system), which is a 3D CAD system for an offshore plant layout. This study reviewed the development of PML (Programmable macro language) for a PDMS supporting offshore plant cable tray design and examined the efficiency compared to the existing method. Cable tray design PML developed in this paper enables fully parametric design using electrical outfit template library, allowing a rapid response to frequent modifications due to design changes and minimizing repetitive work fatigue by reflecting the accumulated design experience. In addition, the developed system was applied to the offshore plant structure module and it improved the work efficiency by more than 50% compared to the existing method.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.273-274
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• 2001

큰민어는 민어과 어류로서, 일본의 천엽현 이남에서 동중국해까지 분포하며, 전장 1.5m, 체중 30kg까지 성장하는 초대형 어류로서 육질이 백색인 고급어종으로 특히 겨울철에 맛이 좋다고 알려져 있다. 최근 들어 큰민어 종묘생산이 성공하면서 양식생산에 대한 관심이 고조되고 있는 실정이다. 양어사료의 영양성분중, 특히 해산어류에서 단백질이 차지하는 비율은 매우 높고, 사료원료중 단백질원료는 가격이 높아 양식대상어종의 최적 사료단백질함량 구명뿐만 아니라 에너지원으로 사용되는 탄수화물과 지질의 함량은 양어사료 설계시 반드시 고려되어야 할 영양소이다. (중략)

• Transactions of Materials Processing
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• v.31 no.5
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• pp.302-308
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• 2022

In this study, the weight of the platen was reduced using the structural strength analysis and topology optimization design of the extruder by finite element analysis. The main components of the extruder such as the stem and billet, were modeled, and the maximum stress and safety factor were verified through structural strength analysis. Based on the results of the structural strength analysis, the optimal phase that satisfies the limitation given to the design area of the structure and maximizes or minimizes the objective function was obtained through a numerical method. The platen was redesigned with a phase-optimal shape, the weight was reduced by 40% (from the initial weight of 11.1 tons to 6.6 tons), and the maximum stress was 147.49 MPa safety factor of 1.86.

• Journal of the Institute of Electronics and Information Engineers
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• v.51 no.10
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• pp.228-234
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• 2014

In the case of construction equipment, internal wiring has a very complicated structure such as an electrical wiring and hydraulic equipments. Because of these complex wiring, a lot of time is spent on maintenance and equipment manufacturing. In this paper, we design and implementation of the high-reliability PLC(Power Line Communication) -CAN(Controller Area Network) communication module to reduce electrical wiring of the construction equipment.

• Proceedings of the Korea Society for Simulation Conference
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• 2005.05a
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• pp.15-20
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• 2005

급속한 정보 기술의 발전에 따라 인터넷 서비스의 고속화에 대한 요구가 급증하고 있다. 이에 따라 인터넷 관련 네트워크 장비들의 수요가 앞으로도 지속적으로 증대할 것으로 쉽게 예상할 수 있다. 하지만 국내 네트워크 관련 장비들은 아직도 외산에 많이 의존하는 실정이며, 특히 인터넷 망을 구성하는 핵심 요소인 인터넷 서버는 외산에 절대적으로 의존을 하고 있다. 따라서 개인용 컴퓨터 생산기술, 중대형 컴퓨터 설계 개발 기술, 메모리 설계 생산 기술 등 국내 산업계가 보유하고 있는 우수한 기술을 바탕으로 지속적인 연구 개발이 이루어져야 할 것이다. 본 논문은 인터넷 기반에서 1Gbps의 전송속도를 갖는 스트리밍 서버의 핵심 구성요소인 네트워크 스토리지 서브시스템의 구조를 제안한다. 본 연구를 통하여 국내에서도 중대형시스템을 위한 컴퓨터시스템의 구조에 대한 연구가 활성화되기를 기대한다.

• Defense and Technology
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• no.8 s.114
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• pp.44-51
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• 1988

캐비닛은 전장에서 기동성 있는 작업공간을 제시하며, 군의 이에 대한 이용도는 이동정비, 지휘통신, 물자수송 등의 측면에서 날로 증가하고 있다. 다음 내용은 서독의 캐비닛 개선에 관한 내용을 번역한 것으로, 개념.계획.완성의 순서로 서술하였다. 이런 점에서 캐비닛은 모체차량으로부터 분리, 운용될수 있어야 하며 핵 및 고주파로부터 방호될 수 있어야 한다는 개념이다. 또한 모체차량의 적재능력 한계로 가능한 캐비닛 자체는 가벼운 재질과 특수제작공법으로 적절한 견고성을 유지할수 있도록 발전시키고 있으며, 사용목적에 알맞도록 캐비닛 내부를 설계, 장비시키고 있는바, 이러한 개선개발 추세를 관련업체나 연구 종사자들이 이해함으로써 개발후 이용도 측면에서 그 효과를 크게 기대할수 있어야 할 것이다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.18 no.2
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• pp.450-455
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• 2017

A shield connector is an automotive electrical component that is used to connect electrical wiring in a vehicle. This part is made by progressive pressing using a phosphor bronze material with high electrical conductivity. The shape of the product is not complicated, but plastic forming techniques are required, such as deep drawing and bending, as well as shearing techniques such as piercing and notching. The finite element method was used to model the process. The strip layout design stage of the progressive die makes it possible to examine the thickness change, the stability of the forming process, and the spring-back. As a result of this analysis, it is possible to predict the correction values for the tendency of cracks, wrinkles, and incomplete plastic deformation, and to identify possible problems in advance. As a countermeasure against the forming error caused by the drawing process analysis, the drawing shape was modified and applied in the process design. For effective material utilization, a 3D strip layout was designed using an optimized blank shape based on nesting. The results improve the crack stability and spring-back of shield connector products produced through progressive pressing.

• Convergence Security Journal
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• v.6 no.4
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• pp.113-120
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• 2006

C4I system is the centerpiece of the military force. The system is an information based system which facilitates information grid, collection of data and dissemination of the information. The C4I system seeks to assure information dominance by linking warfighting elements in the battlespace to information network which enables sharing of battlespace information and awareness; thereby shifting concept of warfare from platform-centric paradigm to Network Centric Warfare. Although, it is evident that C4I system is a constant target from the adversaries, the issues of vulnerability via cyberspace from attack still remains. Therefore, the protection of C4I system is critical. The roadmap I have constructed in this paper will guide through the direction to protect the system during peace and war time. Moreover, it will propose vision, objectives and necessary supporting framework to secure the system from the threat. In order to fulfill these tasks, enhanced investments and plans from the Joint chief of Staff and Defense of Acquisition and Program Administration (DAPA) is critical; thereby enabling the establishment of rapid and efficient security system.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.500-503
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• 2017

차량 내 전장부품이 증가하고, 차량 OEM(Original Equipment Manufacturing)이 다양한 차종을 생산 판매함에 따라 다양한 SW(software) 형상이 개발되고 있다. 따라서, 기존에 개발된 SW 형상과 변경된 SW 형상 간에 기능 일치성 검증에 대한 필요성이 증가하고 있다. 두 가지 SW 형상 간에 기능 일치성 확인을 위한 테스팅 방법으로 Back-to-Back Testing이 있는데, 이는 각 SW 형상에 동일한 입력값을 주입하고 동일한 출력값이 산출되는 지 확인하는 테스팅 방법이다. Back-to-Back Testing 수행 시 Test case 설계가 필요한데, Test case의 분량과 테스팅 종료기준에 대해서 아직 확립이 되어 있지 않다. 이제 본 논문에서는 MC/DC(Modified Condition/Decision Coverage) 개념을 이용하여 Test case 분량과 테스팅 종료 기준에 대해서 제시하고, 이를 적용한 사례를 설명한다. 본 논문에서 제시한 Test case 설계 기준을 적용하면, 제한적인 테스팅 일정과 인력을 만족하고, 기능 일치를 확인할 수 있는 충분한 테스팅이 가능할 것으로 판단한다.