• 제목/요약/키워드: Design component

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커먼레일용 연료 분사시스템의 부품 설계를 위한 해석 모델 개발 (Analysis Model Development for Component Design of the Fuel Injection System for CRDI Engines)

  • 장주섭;윤영환
    • 한국자동차공학회논문집
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    • 제17권3호
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    • pp.117-126
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    • 2009
  • A Common-Rail Direct Injection(CRDI) system for high speed diesel engines was developed to meet reductions of noise and vibration, and emission regulations. In this study, CRDI system analysis model which includes fuel and mechanical sub-systems was developed using commercial software, AMESim in order to predict characteristics for various fuel injection components. Each component which constructs system was modeled and verified by sub-model of AMESim obtained characteristics curves of each components. The parameter sensitivity analysis such as throttle size, injection rate, plunger displacement, supply pressure of fuel injection for system design were carried out by the analysis.

현재 존재하는 구강 스캐너에 대한 고찰 (Review of recent developments for intra-oral scanners)

  • 최종훈;임영준;이원진;한중석;이승표
    • 구강회복응용과학지
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    • 제31권2호
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    • pp.112-125
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    • 2015
  • 구강 내의 모습을 재현하는 복제모델을 만드는 것은 치과 진료에서 가장 중요한 과정이며 정확성과 효율성이 동시에 만족되어야 하는 과정이다. 현재 기술이 발전함에 따라 치과 진료에서도 디지털화가 이루어지고 있다. 이러한 것을 가능하게 하는 가장 중요한 작업 중 하나가 바로 구강 내의 모습을 3차원적으로 재구성하는 디지털화이다. CAD/CAM 시스템의 3가지 성분 (1) data capture component (digitizers), (2) design component (CAD software), (3) manufacturing component (CAM)중 가장 기본이 되며 뒤의 과정에 막대한 영향을 끼치는 것이 data capture component 즉 구강 스캐너이다. 이 논문은 Pubmed와 Google Scholar에서 최근 5년 전 연구 논문들을 기초로 하여, 각각의 스캐너의 구동원리와 스캐너들 간의 정확성, 현재 구강 스캐너가 치과 영역에서 적용되고 있는 분야와 그 정도를 분석하였다.

Influence of multi-component ground motions on seismic responses of long-span transmission tower-line system: An experimental study

  • Tian, Li;Ma, Ruisheng;Qiu, Canxing;Xin, Aiqiang;Pan, Haiyang;Guo, Wei
    • Earthquakes and Structures
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    • 제15권6호
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    • pp.583-593
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    • 2018
  • Seismic performance is particularly important for life-line structures, especially for long-span transmission tower line system subjected to multi-component ground motions. However, the influence of multi-component seismic loads and the coupling effect between supporting towers and transmission lines are not taken into consideration in the current seismic design specifications. In this research, shake table tests are conducted to investigate the performance of long-span transmission tower-line system under multi-component seismic excitations. For reproducing the genuine structural responses, the reduced-scale experimental model of the prototype is designed and constructed based on the Buckingham's theorem. And three commonly used seismic records are selected as the input ground motions according to the site soil condition of supporting towers. In order to compare the experimental results, the dynamic responses of transmission tower-line system subjected to single-component and two-component ground motions are also studied using shake table tests. Furthermore, an empirical model is proposed to evaluate the acceleration and member stress responses of transmission tower-line system subjected to multi-component ground motions. The results demonstrate that the ground motions with multi-components can amplify the dynamic response of transmission tower-line system, and transmission lines have a significant influence on the structural response and should not be neglected in seismic analysis. The experimental results can provide a reference for the seismic design and analysis of long-span transmission tower-line system subjected to multi-component ground motions.

부품ㆍ소재 정보를 위한 분류 체계 설계 (Classification System of material and Component Technology and Industry)

  • 이희상;유재영;정의섭
    • 기술혁신학회지
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    • 제6권1호
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    • pp.110-124
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    • 2003
  • In this study, we establish technology classification system for twelve material and component(MC) areas to sup-port systematic information services for MCT-20l0 which is supported by Korean government. We propose some design principles for MC technology classification system. The principles are suggested by considering of the characteristics of MC classification, regarding with scope, originality, hierarchy, relationship between technology classification and product classification, duplication and complex structure, use of information system, and life cycle of the classification system.

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CBD기법을 이용한 EJB기반의 주문관리 시스템의 설계 및 구현 (Design and Implementation of CBD Based Orders Management System under the EJB Environments)

  • 이종수;황두성;김미성;권오현
    • 한국멀티미디어학회:학술대회논문집
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    • 한국멀티미디어학회 2002년도 추계학술발표논문집
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    • pp.711-715
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    • 2002
  • 소프트웨어 위기 극복으로부터 시작한 소프트웨어 공학이 최근 가장 경쟁력 있는 소프트웨어 개발 기술로 지목하고 있는 컴포넌트 기반 개발(CBD; Component Based Development) 기술은 높은 생산성과 고품질의 소프트웨어의 개발을 가능하게 되었다. 소프트웨어 Component를 조립해 새로운 Application을 만들 수가 있어 개발기간을 단축할 수 있으며 기존의 Component를 재사용할 수 있어 생산성과 경제성을 높일 수 있다. 본 논문에서는 특정물품의 주문 관리시스템을 대상으로 하여 컴포넌트기법을 활용 분석, 설계, 구현을 하였다. 분석과 설계는 UML을 활용하였으며, 구현은 EJB를 이용하여 Component를 생성하였다.

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Development of Component Framework for Supply-Chain Management

  • Wang, Gi-Nam;Choi, Jung-Won
    • 한국전자거래학회:학술대회논문집
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    • 한국전자거래학회 1999년도 학술대회지 vol.2
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    • pp.431-445
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    • 1999
  • This paper introduces a development of component based framework of supply-chain management. The existing legacy system, which is not designed for object-oriented paradigm, is re-modeled using unified modeling language. Components are extracted from the legacy application, and frameworks are also designed in order to increase productivities of software development. Design issues concerning component and framework development are discussed with real situation. Performance and development productivity issue are also discussed with discussing component size and scope. A real case is presented in connection with the discussed issues.

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PM Steels Approaching the Performance of Wrought Steels

  • Tengzelius, Jan
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.409-410
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    • 2006
  • New applications for PM have resulted in a substantial market growth during the last decades. The clue to these components lies in the utilization of new powders and component production processes. In order to reduce development time and increase the probability for success it is essential to work in close cooperation within the whole chain from powder supplier to component supplier and component user.

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최적화설계시스템을 이용한 터빈블레이드 냉각통로의 형상설계 (Shape Design of Passages for Turbine Blade Using Design Optimization System)

  • 정민중;이준성
    • 대한기계학회논문집A
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    • 제29권7호
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    • pp.1013-1021
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    • 2005
  • In this paper, we developed an automatic design optimization system for parametric shape optimization of cooling passages inside axial turbine blades. A parallel three-dimensional thermoelasticity finite element analysis code from an open source system was used to perform automatic thermal and stress analysis of different blade configuration. The developed code was connected to an evolutionary optimizer and built in a design optimization system. Using the optimization system, 279 feasible and optimal solutions were searched. It is provided not only one best solution of the searched solutions, but also information of variation structure and correlation of the 279 solutions in function, variable, and real design spaces. To explore design information, it is proposed a new interpretation approach based on evolutionary clustering and principal component analysis. The interpretation approach might be applicable to the increasing demands in the general area of design optimization.

일반성 향상을 위한 가변성 설계 기법 및 커스터마이제이션 기법 (A Variability Design and Customization Technique for Improving Generality)

  • 김철진;조은숙
    • 한국멀티미디어학회논문지
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    • 제9권8호
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    • pp.1076-1085
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    • 2006
  • 다양한 요구 사항들을 완전하게 만족시켜 주기 위한 컴포넌트의 설계는 매우 어려우며 또한 도메인의 특정화된 업무 로직을 완전하게 수용하는 것은 불가능하다. 이러한 요구 사항을 만족시키기 위해 블랙 박스보다는 화이트 박스 컴포넌트로 제공될 필요가 있다. 본 논문에서는 다양한 도메인의 요구사항을 수용할 수 있는 장치를 제공하기 위해 컴포넌트의 가변성 설계 기법과 이런 설계 기법을 이용하여 컴포넌트를 커스터마이제이션 하기 위한 기법을 제안한다. 컴포넌트의 가변성은 컴포넌트 개발 과정에서 초기 가변성이 설계되며 가변성 적용을 위해 커스터마이제이션 기법을 이용한다. 본 논문에서는 컴포넌트의 기능 변경을 위한 행위 가변성 설계 기법과 커스터마이제이션 기법을 제안한다. 가변성이 적용된 컴포넌트는 이를 기반으로 한 어플리케이션을 개발하는 과정에서 가변성이 재설계될 수 있으며 이러한 과정을 통해 컴포넌트의 가변성이 진화되고 컴포넌트의 일반성이 더욱 향상될 수 있다.

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Internal force monitoring design of long span bridges based on ultimate bearing capacity ratios of structural components

  • Hu, Ke;Xie, Zheng;Wang, Zuo-Cai;Ren, Wei-Xin;Chen, Lei-Ke
    • Structural Monitoring and Maintenance
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    • 제5권1호
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    • pp.93-110
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    • 2018
  • In order to provide a novel strategy for long-span bridge health monitoring system design, this paper proposes a novel ultimate bearing capacity ratios based bridge internal force monitoring design method. The bridge ultimate bearing capacity analysis theories are briefly described. Then, based on the ultimate bearing capacity of the structural component, the component ultimate bearing capacity ratio, the uniformity of ultimate bearing capacity ratio, and the reference of component ultimate bearing capacity ratio are defined. Based on the defined indices, the high bearing components can then be found, and the internal force monitoring system can be designed. Finally, the proposed method is applied to the bridge health monitoring system design of the second highway bridge of Wuhu Yangtze river. Through the ultimate bearing capacity analysis of the bridge in eight load conditions, the high bearing components are found based on the proposed method. The bridge internal force monitoring system is then preliminary designed. The results show that the proposed method can provide quantitative criteria for sensors layout. The monitoring components based on the proposed method are consistent with the actual failure process of the bridge, and can reduce the monitoring of low bearing components. For the second highway bridge of Wuhu Yangtze river, only 59 components are designed to be monitored their internal forces. Therefore, the bridge internal force monitoring system based on the ultimate bearing capacity ratio can decrease the number of monitored components and the cost of the whole monitoring system.