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RISS 인기검색어
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- 저자 : 박중호(J.H. Park) (검색결과 129 건)
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박중호(J. H. Park),조선미(S. M. Cho),윤동원(D. W. Youn),윤소남(S. N. Yun),안경관(K. K. Ahn) 한국동력기계공학회 2005 한국동력기계공학회 학술대회 논문집 Vol.- No.-
A simple pressure control valve using magneto-rheological (MR) fluid is presented, which is called the MR valve. The MR valve utilizes the apparent viscosity controllability of the MR fluid in the magnetic field and controls high-level fluid power without moving parts. However, conventional MR fluids have high base viscosities to disperse heavy soft iron particles and lose fluid power in pipes. In this study, low base viscosity MR fluids are developed using lightweight ferrite particles and applied to the MR valve. First, four MR fluids are fabricated with different compositions and the basic characteristics. are experimentally investigated with the 2-port MR valve. Second, a small-sized 3-port MR valve using a permanent magnet is proposed and the design procedure is theoretically derived. Third, the 3-port MR valve is fabricated and magnetic field analysis is performed. Furthermore, static and dynamic characteristics of the MR valve are experimentally investigated.
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나노스템프 위치제어용 중공형 압전액추에이터에 관한 연구
박중호(J. H. Park),이재종(J. J. Lee),최기봉(K. B. Choi),윤소남(S. N. Yun) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
In recent years, nanoimprinting lithography has been actively investigated, which can replicate nano-patterned master stamp into wafer and so on. Miniaturized precise actuators to control stamp displacement of doens of um in limited space are required for driving nanoscale stamp. In this study, basic characteristics on displacement and generation force of the prototype of hollow piezoelectric actuator developed for positioning stamp are experimentally investigated.
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박중호(J. H. Park),서미영(M. Y. Seo),김진규(J. G. Kim),함영복(Y. B. Ham),윤소남(S. N. Yun),서응수(E. S. Seo) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.10
In this study, a hollow MR(Magneto-rheological) brake instead of conventional powder brake is presented for high-tension control of converting machinery such as coater, slitter and so on. First, to obtain the higher performance than conventional powder brake, a hollow MR brake is newly mechanism designed and analyzed by using electromagnetic field analysis. Second, a prototype of the hollow MR brake is fabricated considering the converting machinery installation and an experimental apparatus is constructed. Finally, basic characteristics between current and torque are experimentally investigated.
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