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김정윤(Jungyun Kim),김기대(Gidae Kim) 한국산업경영시스템학회 2011 한국산업경영시스템학회지 Vol.34 No.4
This article proposes a novel shift automation mechanism for an automated manual transmission (AMT). The development of an automated manual transmission is currently being paid considerable attention by vehicle manufacturers, with the prospects of combining the comfort of an automatic transmission and the high efficiency of a manual transmission. In order to automate the shift mechanism of a manual transmission, the proposed shift automation mechanism consists of two electric motors, cross shaped pinion gears, rack type shift rails, and a ball splined hollow shaft. First we describe the shift mechanism and operating principles of a manual transmission to investigate important design criteria for the shift automation device. And a new shift automation mechanism is described with its structure, elements, and operating principles in detail. Using a conventional manual transmission, we develop a full three-dimensional CAD model of an AMT which includes main components of the manual transmission and the designed shift automation mechanism. Finally we investigate the operating performances and feasibility of the designed AMT by a dynamic analysis.
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김정윤(Kyle Jungyun Kim),김기대(Gidae Kim) 한국자동차공학회 2005 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
This article introduces the design and analysis of a new type of wheeled mobile robot that uses a spherical continuously variable transmission (S-CVT) element. The S-CVT is composed of a sphere, input and output discs, and variators, and power transmission is based on the friction force between the discs and the sphere. Use of the S-CVT allows for smooth operation of the mobile robot over all phases of forward, neutral, and reverse motion without the use of any brakes or clutches. The S-CVT also permits the motors to operate in their most power-efficient regimes. Motion in the plane, including pure rotation about its center, is achieved by a novel pivot device that eliminates the need for an actuated steering wheel, or an additional motor for differentiating the wheel velocities.<br/> The current study takes into account features of the dc motors, the S-CVT, and the mobile robot dynamics to perform a comprehensive study on the overall system performance. As a benchmark, we consider the same mobile robot equipped with a reduction gear unit. We develop optimal control laws for both the reduction gear unit and S-CVT equipped mobile robots, and compare their energy efficiency through numerical studies. We then present numerical results that demonstrate the energy savings possible from the use of the S-CVT mechanism over standard reduction gear units.
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교양전공 교육과정 개발 연구: 경남대학교 사례를 중심으로
박윤철(Yooncheol Park),김기대(Gidae Kim),박갑제(Kapje Park),지영주(Youngju Jee) 인문사회과학기술융합학회 2019 예술인문사회융합멀티미디어논문지 Vol.9 No.5
본 연구는 교양 영역을 전공화시킴으로써 더욱 체계적인 교과과정을 마련하는데 그 목적을 두고 있다. 4차 산업혁명시대의 도래를 앞두고 학생들은 사회인으로서 토대가 되는 올바른 인성교육과 교양교육의 정립이 필요하다. 본 연구에서 고찰한 교양전공은 인간이해와 가치판단력, 사회이해와 시민정신, 과학과 기술의 이해와 융복합 사고능력, 심미적 공감능력이라는 4가지 영역으로부터 복수전공과 부전공을 마련하는데 역점을 두고 있다. 사실 경남대학교의 교양교과 과정은 기초교육, 교양필수, 교양선택, 전공기초로 구분하여 학생들이 적절한 교양교육을 배양할 기회를 갖지 못하였다. 교양교육은 단순히 전공수업의 기초과정을 배양하는 창구 역할을 수행해 왔다. 하지만 학과의 전공이 직업을 위한 교육이라면 교양은 자유인으로서 역량을 배양하는데 그 가치를 부여하고 있다. 이러한 현실을 반영하듯 교양교육은 단순히 학과 전공 수업을 위한 보조적 단계에서 벗어나 독립된 전공과정으로서 역량을 개발할 필요성을 지닌다. 따라서 본 연구는 기존의 교양교과 과정을 중심으로 교양전공의 필요성과 그 배경을 제시하는데 의의를 두고 있다. The purpose of this study is to provide more systematic curriculum by specializing the liberal arts area. As the era of the Fourth Industrial Revolution begins, however, students need to establish the right personality education and liberal arts education that form the foundation of society. The major of liberal arts examined in this study is emphasizing the preparation of double and minor major from the four areas: human understanding and value judgment, social understanding and citizen spirit, understanding of science and technology and convergent thinking, and aesthetic empathy ability. The curriculum at Kyungnam University is divided into basic education, compulsory/optional liberal arts subjects, and basic majors, which deprive students of opportunities to take proper liberal arts education. In other words, the liberal arts education has merely played a role as a window to cultivate the basic course of major studies. However, while the majors of the department are education for the profession, the liberal arts give value to cultivate competence as a freeman. Reflecting this reality, the liberal arts education needs to develop its capacity as an independent major course. Therefore, this study suggests the necessity of liberal arts major in the liberal arts curriculum.
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