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이정우(J-W Lee),권순찬(S-C Kwon),권오병(O-B Kwon) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.5_2
This paper describes design of automotive electronic system checker that is used for out-of line test. The design requirements are discussed in detail and design procedure to meet design requirements is described also. Various methods of test result record keeping are discussed and compared with each other. And then, the construction of whole system including test software is described in depth. In addition, design of power down management system is shown. The equipment is used to test electronic system of Carnival and the performance is proved to be good enough. Design enhancements to improve equipment reliability are also discussed.<br/>
Cell size와 방향에 따른 WBK 심재의 압축거동
이정우(Jeong Woo Lee),이민근(Min Geun Lee),강기주(Ki-Ju Kang),윤종원(J.W.Yoon),한상민(S.M.Han),서용석(Y.S.Suh) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This paper studies the compressive properties of mild steel WBK (Wire-woven Bulk Kagome) cores. To determine stiffness, the average displacements of WBK were measured using the two clip gages. The effects of orientation and cell size on the equivalent strength and equivalent Young’s modulus of WBK for given external dimensions of the specimens are evaluated. The equivalent peak strengths of the WBK cores in y and x-orientations were about 3/4 and 1/2 of that in z-orientation, respectively, and the equivalent Young’s moduli in y and x-orientations were about 5/6 of that in z-orientation.
이정우(J.W.Lee),R.Yamane, 김춘식(C.S.Kim),이영호(Y.H.Lee) 한국해양대학교 해사산업연구소 1996 海事産業硏究所論文集 Vol.5 No.-
Vortex generators are used as effective controllers of aerodynamic characteristics of industry equipments. But full knowledge of their mechanism is not attainable due to complex interaction between shedding vortices and bodies. This study focuses on an investigation of flow patterns from simple vortex generators by LDV measurements and smoke wire visualization. Circular cylinder is adopted for preliminary examination of velocity wake patterns and three kinds of generator shapes and two kinds of gap angles for their generator were tested in a wind tunnel. As experimental results, quite different wake patterns and velocity distribution within the wake region are observed.