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300마력 휠 로더용 가변식 사판 피스톤 펌프 로터리부 기본 특성 해석
이승현(S. H. Lee),김범환(B. H. Kim) 유공압건설기계학회 2016 유공압건설기계학회 학술대회논문집 Vol.2016 No.11
A modeling technique is proposed for dynamic simulations of swash plate axial piston pump. a simulation model of axial piston pump is used to Simulation-X software. In this paper, it was lead theoretical formular to identify the major parameters caused the flow and pressure ripple and also the effect of its parameter is showed through the simulation. it is able to be reduced flow and pressure ripple by notch of triangle type, but its more improvement is requested by another method.
서순석(S S Seo),장영길(Y G Jang),김광곤(K G Kim),박민영(M Y Park),안수련(S R Aan),김범환(B H Kim) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
A study on simplification of electrical construction Bill of quantities are needed in order to maximize the efficiency of office work and reduce the cost of electrical construction project. Special regards are paid to the safety, adaptation to computer system comprehensibility and objectiveness of electrical construction material bill in this simplification study. Main features of the present research are to express accessory electrical cost as a rate of main electrical material cost, adopt combined unit cost system, change units of items, and make cost breakdown in the middle class of the work breakdown structure.