• Title/Summary/Keyword: 구조재

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재사용 가능한 모듈로 구성된 이동로봇의 하이브리드 제어구조 설계

  • 남화성;송재복
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.05a
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    • pp.24-24
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    • 2004

  • 인간과 로봇이 공존하는 불확실하고 예측이 어려운 복잡한 환경에서 로봇이 원하는 목적지까지 안전하게 주행하고, 원하는 작업을 수행하기 위해서는 로봇의 인지능력, 판단능력 및 강인한 적응능력이 요구된다. 이러한 로봇을 구성하는데 있어서 시스템의 통합, 즉 제어구조의 설계는 매우 중요하다. 고전적인 제어구조의 형태는 각각 단편화된 deliberative 구조이거나 reactive 구조였다. deliberative 구조는 센서 데이터를 이용한 환경 모델링을 통해 복잡한 환경에서 로봇의 임무수행과 인간과의 의사전달을 가능하게 하였다.(중략)

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Structural Design and Experimental Investigation of A Medium Scale Composite Wind Turbine Blade Considering Fatigue Life (피로 수명을 고려한 중형 복합재 풍력터빈 블레이드의 구조설계 및 실험 평가)

  • Gong, Chang Deok;Bang, Jo Hyeok
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.31 no.3
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    • pp.23-30
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    • 2003

  • In this study, the various load cases by specified by the IEC61400-1 international specification and GL Regulations for the wind energy conversion system were considered, and a specific composite structure configuration which can effectively endure various loads was proposed. In order to evaluate the structure, the structural analysis for the composite wind turbine blade was performed using the finite element method(FEM). In the structural design, the acceptable configuration of blade structure was determined through the parametric studies, and the most dominant design parameters were confirmed. In the stress analysis using the FEM, it was confirmed that the blade structure was safe and stable for all the considerd load cases. Moreover the safety of the blade root joint with insert bolts, newly devised in this study, was checked against the design loads and also the fatigue loads. The fatigue life for operating more than 20 years was estimated by using the well-known S-N linear damage rule, the load spectrum and Spera's empirical equations. The full-scale static test was performed under the simulated aerodynamic loads. from the experimental results, it was found that the designed blade had the structural integrity. Furthermore the measured results were agreed with the analytical results such as deflections, strains, the mass and the radial center of gravity. The studied blade was successfully certified by an international institute, GL, of Germany.

  • https://doi.org/10.5139/JKSAS.2003.31.3.023 인용 PDF KSCI