• 방사성폐기물학회지
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• 제3권3호
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• pp.237-247
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• 2005

방사능에 오염된 시설물의 해체 작업은 예측할 수 없는 방사능의 출현으로 항상 사고의 위험성에 노출되어 있어 계획했던 해체 일정이 변경되어야 하고, 전체 공정의 재설계가 다시 수행되어야 하는 비경제적인 작업이 수없이 반복되고 있다. 해체 디지털 목업 시스템 설계에 필요한 구성인자들을 검토하였다. 조사된 단위 구성요소들은 해체 데이터베이스 시스템, 연구로 시설과 제염 및 해체 장비 모델링 시스템, 방사능 오염 분포도를 제작하는 3차원 방사화 매핑, 그리고 해체 일정을 평가하는데 기초가 되는 단위 작업별 평가식과 가중치 값 등이 있다. 독립적으로 운영되는 이들 구성 요인들을 통합된 시스템으로 만들기 위해 단위 시스템들에 대한 아키텍쳐 구현 연구가 수행되었다. 연구 결과 해체 디지털 목업 시스템을 통합된 환경에서 다양한 시나리오를 시험 평가할 수 있도록 하기위해 연구로 시설의 제염 및 해체 활동을 시각적으로 보여줄 수 있는 가시화(visualization) 모듈과 해체 일정 및 해체 비용을 평가 및 분석하는 시뮬레이션(simulation) 모듈로 구분하여 소프트웨어 아키텍쳐를 구현하였다.

• 해양환경안전학회지
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• 제17권3호
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• pp.283-289
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• 2011

레저선박의 대형화와 고부가가치화로 인해 설계 요구조건은 점차 까다로워지고 있으며, 제작공정 또한 기존보다 복잡해지고 있다. 해외의 레저선박 제작업체들은 PLM 개념 기반 3차원 모델 설계시스템 구축을 통하여 이러한 환경을 극복하기 위해 노력하고 있다. 반면 국내의 경우 아직까지 2차원 도면 중심의 전통적인 레저선박 개발 프로세스에 머물고 있으며, 일부 3차원 모델 기반 설계시스템을 갖추기 위한 노력이 있었으나 이는 매우 초기단계에 속한다. 본 연구에서는 DMU 기술을 레저선박 설계 프로세스에 적용하기 위한 초기연구를 수행하였다. DMU 모델 중심으로 레저선박 설계를 수행함으로써 DMU 모델 기반 설계 프로세스를 정립하였고, 40 ft급 알루미늄 레저보트 설계사례를 통해 그 효용성을 입증하였다.

• 수산해양기술연구
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• 제44권4호
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• pp.353-361
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• 2008

Recently a modern style sailing boat suitable for Korean sea was designed through full three dimensional design skill by the authors. In this paper, based on this three dimensional hull and deck design, a production process of 31ft class cruiser sailing boat was developed. First of all, it was possible to make the digital mock-up for design boat. Through this mock-up and RP(rapid prototyping) modeling, an appropriate general arrangement of design boat was able to be determined at final. And also the female deck mould was able to be made by a 5-axis NC cutting machine. By doing this method, more higher efficiency and precision for sailing boat production could be achieved than before. Through this research the total process of design and construction for the designed boat was established.

• KIEAE Journal
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• 제8권1호
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• pp.53-60
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• 2008

The daylighting affects on the human biological cycles and physiological alterations. Daylighting is also an important element in visual comfort and it sometimes influences the quality of vision. Therefore the absence of natural light during the day brings contradictory result. To solve the problems of natural light lack and provide sufficient daylight in interior spaces, it might be necessary to apply some daylighting systems. One of these systems, light pipe system, which is simple, cheep and easily constructed, is very useful to apply for small buildings. The light pipe is simple means of directing daylighting (diffuse and direct lighting)into interior space. In order to application of light pipe system in Korea, it is necessary to optical data of light pipe system. This study aims to evaluate preliminary experiment of the daylighting environment of light pipe system. Light pipe system, that aspect ratio is 1:2(diameter and length), was installed in a windowless mock-up with $27m^2$. The mock-up model was constructed as a prototype of Korean office surface. Illuminance was measured with a Topcon IM-5 Luxmeter to evaluate the distribution of the illuminance on a floor. The indoor and outdoor illuminance and the internal/external illuminance ratio are compared to discuss with in the graphs. Luminance was measured with Radiant imaging Promertric 1400 that is digital photometer to evaluate the distribution of luminance on interior surface. The contrast of luminance is discussed with table and graphs.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2004년도 학술논문집
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• pp.356-357
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• 2004

새로운 제품 또는 프로세스를 개발하기 위해서는 수없이 많은 결정을 해 나가야 한다. 이 과정에서 어떤 결정하나가 잘못되면 우리는 시행착오를 겪거나 경우에 따라 크게 잘못된 결과를 감당해야 한다. 또한 원자력 분야와 같이 작업자의 안전과 건강에 직결되는 작업환경도 수많은 요소들을 고려하여 여러 가지 대안들 중에서 하나를 결정해야 한다. 이러한 결정을 위해, 가상적인 예측실험인 시뮬레이션(simulation)을 수행하게 된다.(중략)

• 한국CDE학회지
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• 제4권2호
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• pp.36-41
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• 1998

To survive in the intensive world wide automotive market, more and more automotive companies are investing their resources into concurrent engineering systems (CE) based on the combined CAD/CAM/CAE/ PDM technology. The main objectives of CE in automotive companies are the quality improvement of products and the reduction of cost and time to market. Remarkable effects are appearing from some of these companies. As shown in this paper, these successful automotive companies have been focusing on establishing the new process and methodology in applying CE into their car development process.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.363-366
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• 2004

KAERI is developing the Advanced Spent Fuel Conditioning Process (ACP) as a pre-disposal treatment process for spent fuel. In this process, the management process must operate in intense radiation fields as well as in a high temperature. Therefore, remote maintenance has played a significant role in this process. Hence suitable remote handling and maintenance technology needs to be developed along with the design of the process concepts. To do this, we developed the digital mockup for the ACP. The digital mockup provides the capability of verifying the remote operability of the process without fabrication of the process equipment. In other words, by applying virtual reality to the remote maintenance operation, a remote operation task can be simulated in the digital mockup. Through utilizing this graphic simulation in this digital mockup, general guidelines can be established for designing equipment intended for remote handling and maintenance. Also, the designer of the equipment that must be remotely maintained should ensure that there is adequate access to the process equipment. The graphic simulator will substantially reduce the cost of the develo363pment of the remote handling and maintenance procedure as well as the process equipment.

• 안보군사학연구
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• 통권3호
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• pp.197-242
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• 2005

Active catalog is a kind of digital content that enables consumers to test the functions and features of products from their PCs as if they were using it in real life, by simulating the actions and responses of the product. This new type of interactive digital content can be used extensively to make sales personnel training manuals, sales tools, user manuals and user trouble shooting documents. With active catalogs, companies will be able to compare different designs, show actions according to different functions, and evaluate user reaction to new products without having to produce a single physical prototype or mock-up. At the same time, consumers will be able to understand and 'operate' the product and make well-informed purchase decisions. In this paper, we present a visual event-driven modeling tool, PlayMo, for creating active catalogs, analyze the advantages of using PlayMo, describe the event-driven method used by PlayMo and also introduce two enhanced characteristics of the Event Flow Chart with which the events in PlayMo are structured. Interactive digital content by using the PlayMo3D makes easy, simple and effective design for e-learning, e-catalogue, e-marketing/sales, e-prototyping, customer support, etc. Through its application-ready 3D function visualization solution, engineers and designers can rapidly turn a CAD design model into a 3D interactive virtual product, and the effective function prototyping job can be also completed within a minute.

• 전자공학회논문지T
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• 제35T권1호
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• pp.40-47
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• 1998

광학헤드는 디지털 오디오 및 비디오 장치의 핵심부품으로서 일반 가전제품에서부터 컴퓨터 기억장치 및 게임기까지 광범위하게 응용되고 있으며, 광미디어의 수요가 확대됨에 따라 그 수요도 급속도로 증가되는 추세이다. 본 논문에서는 광학헤드의 핵심 구성요소인 포커스 및 트랙킹 서보용 2축 구동부를 와이어 부동형 외팔보 형태로 설계하고, 시뮤레이션 및 시제작 특성 분석을 통하여 그 설계 타당성을 검증하였다. 또한, 시제작 특성 분석을 통하여, 설계상의 원인외에 2축 구동부의 성능에 악영향을 미치는 조립공정의 인자를 파악하였다.

• 대한기계학회논문집A
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• 제31권2호
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• pp.260-268
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• 2007

Demand for the use of 3D CAD DMU systems over the Internet environment has been increased. However, transmission of commercial 3D kernels has delayed the communication effectiveness due to the kernel size. Light weight CAD geometric kernel design methodology is required for rapid transmission in the distributed environment. In this paper, an assembly data structure suitable for the top-down and bottom-up assembly models has been constructed. Part features are stored without a hierarchy so that they are created and saved in no particular order. In particular, this paper proposes a new assembly representation model, called multi-level assembly representation (MAR), for the PDM based assembly DMU system. Since the geometric kernel retains assembly hierarchy and topological information, it is applied to the web-viewer for the PDM based DMU system. Effectiveness of the proposed geometric kernel is confirmed through various case studies.