• Title/Summary/Keyword: 성형 시스템

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생산 및 설계공학부문

  • 김성청
    • Journal of the KSME
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    • v.43 no.8
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    • pp.64-73
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    • 2003
  • 2002년도 한 해 동안 생산 및 설계공학 관련 분야를 중심으로, 소성가공, 절삭가공, 금형 및 사출성형, 용접 및 특수가공, 생산자동화 및 관리, CAD/CAM, 기계요소 및 기구설계, 공작기계 및 기계시스템설계, 지적설계 및 최적설계, 윤활 및 마멸, 생체공학, MEMS 등으로 분류하여 각 분야에서 그 동안 발전 개발하여 게재된 연구 및 실험 논문들을 중심으로 이들 분야에 대한 관련 동향등을 정리하면 다음과 같다.

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Channel Modeling for UWB MB-OFDM System Considering RF Frequency Hopping (RF 주파수 호핑을 고려한 UWB Multi-Band OFDM 시스템 채널 모델 성형)

  • Noh, JungHo;Heo, Joo;Chang, KyungHi
    • Journal of Advanced Navigation Technology
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    • v.8 no.1
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    • pp.73-80
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    • 2004
  • In the case of Non-Line-of-Sight (NLOS), common telecommunication systems typically have Rayleigh distributed amplitude characteristics. However measurement result of Ultra Wideband (UWB) Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) system which is proposed as one of candidate standard in IEEE 802. 15. 3a for Wireless Personal Area Network (WPAN) shows that it has independent log normal fading in each cluster as well as in each ray within the cluster. Based on this clustering phenomenon observed, MB-OFDM channel model derived from Saleh-Valenzuela model with a couple of slight modifications. In this paper, channel remodeling for RF frequency hopping in MB-OFDM system is achieved, and performances of MB-OFDM system for each channel mode and data rate are verified using modified channel model.

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A comparative study in input shaping techniques using a flexible manipulator (유연한 조작기를 이용한 입력성형기법의 비교 연구)

  • 심호석;이재원;주해호
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.1269-1272
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    • 1996
  • Several input shaping techniques are suggested to reduce the vibration of a flexible manipulator. The theories of typical 4 methods(Singer, Tuttle, Feddema, Zuo) are explained and are tested by the experiment of one link flexible manipulator. Zuo's method is the best of all with respect to its robustness.

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