• 제목/요약/키워드: Chun-Kwang

검색결과 1,164건 처리시간 0.027초

보강된 복합재료 쉘구조물에 대한 좌굴후 해석모듈의 특성분석 (Characteristic analysis for postbuckling analysis modules of stiffened composites shell structure)

  • 오세희;김천곤;김광수
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2004년도 춘계학술발표대회 논문집
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    • pp.288-291
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    • 2004
  • The characteristics of the buckling analysis module for stiffened composite structures were studied in this paper. Composite stiffened structures have geometrical asymmetry and material properties asymmetry. Due to these reason, postbuckling analysis was essential and the characteristics of postbuckling analysis modules for ABAQUS were researched. Static analysis module was considered. By considering the material nonlinearity, progressive failure mechanism was applied and buckling strength was estimated

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On Optical Power Distribution of Grating-Assisted Couplers with Three-Guides

  • Ho, Kwang-Chun;Kim, Yung-Kwon
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2000년도 ITC-CSCC -2
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    • pp.945-948
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    • 2000
  • The coupling properties of supermodes guided by grating-assisted directional couplers (GADCs) can be phrased in rigorous modal theory. Such a modal solution for TE modes expressed by simple electrical transmission-line networks is utilized to analyze the power distribution of GADCS with three guiding channels. In particular, the modal transmission-line theory can serve as a template for computational algorithms that systematically evaluate the coupling efficiency that are not readily obtained by other methods.

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초기재령하의 양생조건이 매스콘크리트 온도관리에 미치는 영향 연구 (An Experimental Study on the Effect of the Early Age Curing Condition on Mass Concrete)

  • 김광돈;김춘호;이충용;황민규
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2006년도 추계 학술발표회 논문집
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    • pp.685-688
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    • 2006
  • As the concrete structure being large-sized and/or high-strengthened, the control of the hydration and curing temperature is made much account. This study, analysing the concrete temperature history from cylindric specimen and mock-up structures, investigates the effect of the early age curing condition and the optimum method of curing temperature control on mass concrete.

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CAN 통신을 이용한 다축 로봇 제어기 (Multi-Axes Robot Controller with CAN)

  • 최영섭;천광수;이동현;김학진
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2007년도 하계학술대회 논문집
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    • pp.491-493
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    • 2007
  • This paper is suggesting the method to embody Multi-Axes robot controller by using CAN which has been the most popular industrial networks. The robot controller guarantees the efficiency and reliability by using CAN as a communication tool between upper robot control parts and lower control parts.

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역률개선 회로를 적용한 Desk-Top Robot (Desk-Top Robot with Power Factor Correction)

  • 천광수;김학진
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2007년도 하계학술대회 논문집
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    • pp.343-346
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    • 2007
  • Recently, many nations have released standard such as EN61000-3-2 to impose a limit on the harmonic current to prevent distortion of AC line and to save energy. Also, the limit on the harmonic current makes use of a trade barrier. Therefore, Power factor correction must have been suitable for a limit on the harmonic current. This paper presents AC servo motor drive to have merits of high power factor for Desk-Top Robot.

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제동 저항 인가에 따른 TCSC 시뮬레이터의 특성 분석 (Operating Characteristics Analysis of TCSC Simulator with Damping Resistor)

  • 전진홍;김광수;김지원;전영환
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2003년도 추계학술대회 논문집 전력기술부문
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    • pp.193-195
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    • 2003
  • In this paper, we present the analysis results of TCSC(Thyritor Controlled Series Capacitor) operating characteristics with damping resisters. This TCSC system is designed for KERI simulator. It consists of many power system components, which are generator models, scale-downed transmission line modules, transformers, switches, FACTS(Flexible AC Transmission System) devices.

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