• 제목/요약/키워드: 3D planning system

검색결과 474건 처리시간 0.03초

Computer Aided Process Planning for 3D Printing

  • Park, Hong-Seok;Tran, Ngoc-Hien
    • 한국생산제조학회지
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    • 제24권2호
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    • pp.148-154
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    • 2015
  • Computer aided process planning (CAPP) keeps an important role between the design and manufacturing engineering processes. A CAPP system is a digital link between a computer aided design (CAD) model and manufacturing instructions. CAPP have been researched and applied in manufacturing filed, however, one manufacturing area where CAPP has not been extensively researched is rapid prototyping (RP). RP is a technique for creating directly a three dimensional CAD data into a physical prototype. RP enables to build physical models automatically and to use to reduce the time for the product development cycle as well as to improve the final quality of the designed product. Three-dimensional (3D) printing is one kind of RP that creates three-dimensional objects from CAD models. The paper presents a computer aided process planning system for printing medical products. 3D printing has been used to solve complex medical problems such as surgical instruments, bioengineered products, medical implants, and surgical guides.

가상 건설 시스템 비전과 구축 방향 (A vision and strategy for developing virtual construction system)

  • 최철호;진상윤;김재준;신현목;이광명;윤수원
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 2007년도 정기 학술대회 논문집
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    • pp.62-67
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    • 2007
  • The research team for the virtual construction development was established with the support of Korea Ministry of Construction and Transportation, and KICTEP (Korea Institute of Construction and Transportation Technology Evaluation and Planning). Its aims are to develop system that is to improve productivity & quality, to create a higher value-added business, and to cultivate international competitiveness in the construction industry. The virtual construction system is a design, engineering, and construction management information system that allows the project participants to effectively share the information throughout the construction life cycle with the support of 3D and design information. To achieve this, the research team focuses on developing several systems. First, the team focuses on developing for the pre-planning, the structural engineering, MEP, and the 3D based estimation system. Second, they focus on developing a simulation system for the construction process planning and feasibility study with help of the virtual reality technologies. Third, they focus on developing the CPLM (Construction Project Life-cycle Management) system for managing construction project data, and the decision support system that makes the collaboration among the project participants based on 3D technologies and information. We also focus on developing the SDAI (Standard Data Access Interface), the localized guideline for 3D design, and a training program. In addition, we focus on developing the undeveloped area of the commercial system and building an environment that can support the communication and collaboration in the construction life-cycle rather than developing the existing and commercialized system.

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국가 R&D 사업의 계획단계 강화를 위한 분석 및 제언 (Suggestions on How to Improving Planning Process for Governmental R&D Projects)

  • 박승욱;홍진원;김미화
    • 벤처창업연구
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    • 제5권3호
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    • pp.1-25
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    • 2010
  • 최근 국가 R&D에 투입되는 예산이 증가하고 있음에도 불구하고 국가 또는 산업 전반에 큰 파급력을 가지는 괄목할만한 성과의 창출은 이루어지지 않고 있다. 그 이유 중 하나는 국가 R&D 프로젝트의 계획단계가 효과적으로 이루어지고 있지 않기 때문이다. 따라서 본 연구에서는 국가 대규모 R&D 사업단의 사례 연구, 해외 국가 R&D 관리 동향과 주요 R&D 관리 기법들에 대한 분석을 통해 국가 R&D 기획을 강화시키기 위한 제언을 제시하였다. 본 연구 결과는 국가 R&D 계획 체계를 개선하는 데 있어 중요한 정책적 시사점을 제공할 것으로 기대된다.

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ICT 기술혁신체계 프로세스 개선방안 연구 : 과제구분 및 선정평가를 중심으로 (A Study on the Process Improvement of ICT Technological Innovation System : with the Focus on Classification and Assessment of R&D Projects)

  • 임명환;고순주;이중만
    • 경영과학
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    • 제33권3호
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    • pp.53-64
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    • 2016
  • The government is mapping out R&D innovation measures aimed at improving the qualitative level of the performance of national R&D projects that are supported by grants or public funds. This paper proposes ways of making improvements in technology planning, project assessment, performance management, and results evaluation in order to boost the efficiency of the country's promotion of ICT R&D projects, as well as to upgrade the processes involved with its technological innovation system at each of the commercialization stages of its R&D projects. According to our experts' in-depth survey and interview, it has been found that technology planning is the most important phase in the full cycle-based technological innovation system and that the promotion of a combination of top-down and bottom-up approaches is the most reasonable. This paper also suggests it is necessary to secure a process for exploring technological opportunities as the preparatory phase for technology planning, and that it is desirable to reflect the technology demand map associated with the technology road map. Currently, R&D projects are divided into policy designation, designation contest, and free contest. To minimize the inefficiency associated with indiscriminate competition, this paper proposes the introduction of a general contest system in order to change the project assessment system into one based on the results of the competition in each category(e.g. firms, universities, research institutions, etc.).

단지설계업무에서 3차원 공간자료의 활용 (A Pilot Site Planning and Design based on 3D Spatial Information)

  • 황철수;이상훈
    • 토지주택연구
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    • 제3권1호
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    • pp.15-22
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    • 2012
  • 본 연구는 단지설계과정에서 3차원 공간정보 가운데 최근 각광을 받는 LiDAR 자료를 통합하여 정보의 정확성을 높이고 활용성을 확인하는데 목표를 둔 연구이다. 즉, 실제 활용되는 프로그램인 LH공사 업무 중 단지설계프로그램인 DAS를 연구의 대상으로 삼아 3차원 공간정보의 적용가능성을 알아보고 이를 효과적으로 적용시키기 위한 시뮬레이터를 개발하여 구현하였다. 이를 위해 사례연구지역을 선정하여 개발 전 후의 모습을 시뮬레이션하고 이 과정에서 개발 전 모습을 LiDAR 자료를 이용한 방법과 기존의 수치지도 이용 방법에 따른 정확성을 살펴보고, 개발 후 모습을 설계자료를 이용하여 구현하였다. 그 결과 횡단면분석을 통해 분석한 결과 LiDAR가 기존의 지리정보 데이터 보다 높은 정확성을 지니고 있음을 알 수 있었다. 또한 LiDAR 데이터를 활용하여 생성된 수치표고모델(DEM)을 등고선으로 추출하여 DAS프로그램에 적용하는 방안을 제시하였으며, 설계자료를 이용한 모델 생성 일반화식을 제시하였다. 3차원 공간정보를 활용한 시뮬레이터 개발은 3차원 지형모델을 이용한 3차원 공간분석, 3차원 공간정보를 바탕으로 한 의사결정 업무에 활용 가능할 것으로 예상된다.

Network Scalability를 위한 네트워크 설계 및 최적화 방법에 관한 연구 (A Study on Network Planning and Optimization Strategy for Network Scalability)

  • 이동선
    • 한국통신학회논문지
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    • 제32권6A호
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    • pp.511-518
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    • 2007
  • 현재의 전송네트워크용량을 향상시킬때 중요하게 고려해야 할것중의 하나가 네트워크 scalability 이다. 새로운 풀 메쉬의 링 확장 방법 및 플래닝 툴을 제안하였다. 3$\sim$15 노드의 확장링에서 본 툴을 사용하여 SNR이 증진되는 것을 입증하였다. 노드의 출력신호 및 광 SNR이 제안된 NPOT에 의해 -16dBm/10dB 에서 +005dBm/21dB 로 증진되었다.

차륜형 이동로봇의 경로 계획과 자율 주행을 위한 하이브리드 시스템 모델과 제어 (Hybrid System Modeling and Control for Path Planning and Autonomous Navigation of Wheeled Mobile Robots)

  • 임미섭;임준홍
    • 대한전기학회논문지:시스템및제어부문D
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    • 제49권1호
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    • pp.33-40
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    • 2000
  • In this paper, an integrated method for the path planning and motion control of wheeled mobile robots using a hybrid system model and control is presented. The hybrid model including the continuous dynamics and discrete dynamics with the continuous and discrete state vector is derived for a two wheel driven mobile robot. The architecture of the hybrid control system for real time path planning and following is designed which has the 3-layered hierarchical structure : the discrete event system using the digital automata as the higher process, the continuous state system for the wheel velocity controls as the lower process, and the interface system as the interaction process between the continuous system as the low level and the discrete event system as the high level. The reference motion commands for autonomous navigation are generated by the abstracted motion in the discrete event system. The motion control tasks including the feasible path planning and autonomous motion control with various initial conditions are investigated as the applications by the simulation studies.

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디지털공장을 이용한 자동차 조립공장의 자재계획 및 정보관리 (Material Planning and Information Management for Automotive General Assembly using Digital Factory)

  • 노상도;박영진
    • 한국CDE학회논문집
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    • 제9권4호
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    • pp.325-333
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    • 2004
  • To ensure competitiveness in the modern automotive market, material arrangements and information managements should be performed concurrently with new car developments. In automotive general assembly shops, thus, new business workflow and supporting environments are inevitable to reduce the manufacturing preparation time in developing a new car in the manner of concurrent and collaborative engineering. Since complete material arrangements for a whole general assembly system is a huge and complex job, several planners should execute their planning jobs and share information. Therefore, each planner should provide others with his/her results with continuous on-line communication and cooperation. Digital automotive general assembly factory is useful the performing concurrent and collaborative engineering and is essential for material arrangements and information managements systems. In this research, we constructed a sophisticated digital factory of an automotive general assembly shop by measuring and modeling through the parametric 3-D CAD, and a web-based system for concurrent and collaborative material arrangements for automotive general assembly via 3D mock-up is developed. By the digital general assembly shop and developed web-based system, savings in time and colt of manufacturing preparation activities are possible, and the reliability of the planning result Is greatly improved.

Development of Mobile 3D Urban Landscape Authoring and Rendering System

  • Lee Ki-Won;Kim Seung-Yub
    • 대한원격탐사학회지
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    • 제22권3호
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    • pp.221-228
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    • 2006
  • In this study, an integrated 3D modeling and rendering system dealing with 3D urban landscape features such as terrain, building, road and user-defined geometric ones was designed and implemented using $OPENGL\;{|}\;ES$ (Embedded System) API for mobile devices of PDA. In this system, the authoring functions are composed of several parts handling urban landscape features: vertex-based geometry modeling, editing and manipulating 3D landscape objects, generating geometrically complex type features with attributes for 3D objects, and texture mapping of complex types using image library. It is a kind of feature-based system, linked with 3D geo-based spatial feature attributes. As for the rendering process, some functions are provided: optimizing of integrated multiple 3D landscape objects, and rendering of texture-mapped 3D landscape objects. By the active-synchronized process among desktop system, OPENGL-based 3D visualization system, and mobile system, it is possible to transfer and disseminate 3D feature models through both systems. In this mobile 3D urban processing system, the main graphical user interface and core components is implemented under EVC 4.0 MFC and tested at PDA running on windows mobile and Pocket Pc. It is expected that the mobile 3D geo-spatial information systems supporting registration, modeling, and rendering functions can be effectively utilized for real time 3D urban planning and 3D mobile mapping on the site.

FDM 방식의 3D 프린터를 이용한 골반 골절 환자의 맞춤형 모델제작 (Customized Model Manufacturing for Patients with Pelvic Fracture using FDM 3D Printer)

  • 오왕균
    • 한국콘텐츠학회논문지
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    • 제14권11호
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    • pp.370-377
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    • 2014
  • 최근 3D 프린팅 기술은 다양한 의학 분야에서 활용하고 있으며, 기존의 절삭가공 보다 제작시간과 비용, 과정측면에서 매우 효율적이다. 특히 정형외과에서는 수술시간, 수술 정확성 등의 개선과 환자의 고통 감소와 재수술을 최소화하는 방법으로 관심이 집중되고 있다. 그러나 기존 연구에 사용된 3D 프린터는 하드웨어 및 소프트웨어의 기술적 활용성, 재정적 가용성 등의 문제로 현재 병원에서 일반적으로 널리 사용되지 못하고 있는 실정이다. 본 연구에서는 이를 해결하기 위해 CT 영상을 Open Source DICOM Viewer와 STL 파일변환 프로그램, FDM 와이어 적층가공방식의 조립형 3D 프린터로 골반 골절 모델을 직접 제작하여 비용과 시간을 단축하고 사전 수술계획에 활용하였다. 6명의 불안정성 골반골절 수술환자의 맞춤형 골 모델을 제작한 후 대학병원 정형외과 임상의에게 골절수술 전에 제공하여 임상적 활용 가능 여부에 대한 검토와 분석의견 결과 정밀도, 해상도가 수술계획에 사용하여도 유용한 것으로 판단되었다.