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마이크로 프로세서를 利用한 D.C.Motor 의 速度制御에 對한 適應制御 理論의 適用에 關한 硏究
金道鉉 명지대학교 1982 明大論文集 Vol.13 No.-
最近에 活潑히 硏究되고 있는 Model reference adaptive control 理論을 microprocessor를 사용하여 直流電動機의 速度制御에 適用할 수 있음을 보였다. 本 論文에서는 一次로 近似시킨 reference model을 設定하고 model의 output과 motor의 output의 差異가 零에 수렴하도록 하였다. 먼저 computer simulation에 의해 reference 入力과 負荷의 變動에 따른 出力을 살펴본 후 microprocessor M 6800을 利用하여 直流電動機를 制御하였는데 input 및 負荷의 급격한 變動에 잘 適用하는 特性을 보여주었다. In this paper, the application of model reference adaptive control theory to the D.C. motor speed control using microprocessor is studied. It is shown that with the use of an adaptive control algorithm the error between output of the motor and the reference model, which is approximated to first order, can be converged to zero. By computer simulation and the practical implementation with the microprocessor M6800, can be concluded that the adaptive control system adapts well to the rapid change of the load and reference inputs.
金道鉉 명지대학교 1982 明大論文集 Vol.13 No.-
본 논문에서는 인덕턴스 시뮬레이션에 관해 논의했다. 또한 이를 이용한 能動 回路網을 구성하여 실제로 인덕턴스로서 작용하는 가를 알아 보았다. 이 方法은 Gyrator을 이용하여 인덕턴스를 실현하는 方法보다 演算增幅器를 1개 더 적게 사용하게 되므로 제작상 利點이 있고 또한 集積化 시키는 데도 유리하다. This study is performed to improve the method of an inductance simulation. And also Active network designed with the use of the inductance simulation is experimentally examined to be operated as a real inductance. The proposed method of the inductance simulation is shown to be more useful than that of using Gyrator in realizing the inductance, because the former has one less Op Amps. than the latter from viewpoint of fabrications.
예응력 인장케이블을 사용한 완전밀폐식 내부탱크의 강도안전성 해석
金道鉉,金貞均 弘益大學校 科學技術硏究所 2007 科學技術硏究論文集 Vol.18 No.-
This paper presents the FEM results on the strength safety of an inner tank with prestressed tension cables. The inner tank of a full containment LNG storage tank stores a cryogenic liquid of -162℃ and supplies a city gas through a gas pipeline network. The inner tank for a full containment LNG tank should support a hydrostatic pressure, boil-off gas pressure, its own weight, thermal expansion load, and dynamic loads, which affect the strength safety of an inner tank structure. The FEM computed results show that a prestressed tension cable increases the strength safety of an inner tank at the lower part of the tank structure. This may recommend the modification of the current design code for the inner tank for increased safety.
김도현,김영신 濟州大學校 師範大學 科學敎育硏究所 1999 科學敎育 Vol.16 No.-
Recently, the impotence of participating in classes actively and cultivating student's thinking ability is emphasized in mathematics education society. Teachers are demanded to change their teaching style centered pencile- and-paper into using the variety instructional aids, such as calculator, vidio tape, computer, ohp, and projector, etc. In this paper, we search for the maple's function and the method that apply maple to the secondary school mathematics Maple has many functions : calculator, algebra, graphics, animation, programing, notebook. We find that maple can be applied to the graph of function, the understand of simultaneous equations, the graph of trigonomtry function, the calculation of limit, the computation of areas as limits, the derivative of a function and tangent line, a solid figure, and others in secondary school mathematics.
김도현 연세대학교 신과대학 2007 신학논단 Vol.49 No.-
What made Lukan community to have their own understanding of the Holy Spirit? On this question, many scholars have concentrated on the social and religious background of Lukan community such as Old Testament, Judaism, Gnosticism, and Hellenism. However, Acts 19:2 shows us that most of people who lived under Jewish and Hellenistic background in the first century did not have specific concept of the Holy Spirit (and he said to them, “Did you receive the Holy Spirit when you believed?” And they said to him, “No, we have not even heard whether there is a Holy Spiht.”). So, we can not easily accept that Luke‘s understanding about Holy Spiht was derived from directly background of Old Testament or Hellenism. This article is an exegetical study of Acts 2:1-4 that is the key text, I believe, to find the origin of Luk’'s understanding on the Holy Spirit. The main reason or origin to have specific understanding of the Holy Spirit to Lukan community was special ‘experience’ that they had on the day of Pentecost (Acts 2:1-4). What happened on that day? Acts 2:1-4, Luke‘s first description about being filled with the Holy Spirit, is composed with fact and interpretation. The only fact that disciples of Jesus experienced actually on Pentecost was that ’they spoke in other tongues‘(Acts 2:4b). When disciples had experience of speaking tongues, they must have been very surprised. After that, they must have needed theological explanation on this mysterious experience. And Eventually, they must have interpreted speaking Glossolalia as the result of fullness of the Holy Spirit naturally because they were waiting for the promise of Jesus that “you shall be baptized with the Holy Spirit not many days from now.”(Acts 1:5). The Lukan community's pneumatology was started and affected by this interpretation and developed on the basis of this interpretation.
김도현 慶北專門大學(영주경상전문대학) 1997 慶北專門大學 論文集 Vol.16 No.-
컴퓨터 기술과 통신 기술의 발전으로 한 대의 컴퓨터만을 사용하여 복잡한 문제를 해결하든 시대에서 여러 컴퓨터가 연결하여 함께 풀어내는 컴퓨터 통신 시대로 발전하고 있다. 본 논문에서는 변화하는 컴퓨터 통신 기술을 융통성 있게 수용하면서, 실질적인 컴퓨터 통신 지식을 습득할 수 있는 실습에 대하여 연구하였다. 연구 내용은 컴퓨터 통신 실습에 필요한 예비 과목, 컴퓨터 통신 이론 밋 기술을 파악하고, 현실적이고 창의적인 컴퓨터 통신 실습 내용과 방안을 제안하였다. 또한, 실습 방안을 토대로 기초 과정으로 직렬/병렬 통신과 응용 과정으로 공중 통신망을 이용한 원거리 통신망 실습 과정을 설명하였다. 이와 같은 내용과 과정으로 컴퓨터 통신을 실습할 경우 기본적인 컴퓨터 통신 원리뿐만 아니라 직접 새로운 컴퓨터 통신 기술과 서비스를 제공함으로 현장감 있는 기술을 쉽게 습득할 수 있다. 또한, 실습한 기술을 바탕으로 학생들은 졸업 후 산업현장에서도 직접 사용자의 요구를 분석하고 새로운 기술과 서비스를 적용하여 최적의 컴퓨터 통신망을 설계하고 구축할 수 있는 능력을 가질 것으로 판단된다. 향후 연구에서는 세부 실습 항목과 내용을 자세히 정의하고, 과 항목별로 기초 이론, 통신망을 필요한 하드웨어, 통신 서비스를 제공하는 소프트웨어를 조사하여 컴퓨터 통신 실습 교재를 개발하여야 한다.