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Micro On-Off Valve 해석에 의한 최적 설계
김동수(D. S. KIM),박상운(S. W. Park),고창섭(C. S. Koh) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Micro On-Off valves are currently recognized as the core technology in the fields of the micro fluid chip for medical applications and production lines of semi-conduct chip. Micro valves that operate by compressed air need the high-speed responsibility, repeatability, the absorbability and the uniform pressure by the poppet. In this study, Micro On-Off valves that posses the high-speed responsibility and the high rate of flow have designed and analyzed through the law of equivalent magnetic circuit and Finite Element Method (FEM) respectively. In case of poppet, Flow field characteristic was analyzed by the variation of poppet and it was able to display flow field by changing the location of the poppet. Also, we verified possibility of the design through the static and dynamic pressure and the 3D distribution curve of the force by working the front poppet.
김원범(W. B. Kim),정현교(H. K. Jung),고창섭(C. S. Koh),한송엽(S. Y. Hahn) 한국자기학회 1991 韓國磁氣學會誌 Vol.1 No.2
A variational approach employing localized functional is presented to solve alternating magnetic field problems with open boundary. The functional used in the approach consists of the domain integral of finite element region only and the boundary integral of the interfacial boundary between the finite and infinite element regions. The boundary integral is obtained by transforming the infinite domain integral for the infinite element region into the interfacial boundary integral. The proposed algorithm is then applied to a simple two-dimensional problem where the analytic solutions are available. It is shown that the algorithm makes it possible to yield good agreements between the numerical and analytic solutions, and that it requires less computer storage memory and computation time than the conventional finite element method due to the reduction of the computing region.