• Proceedings of the KIEE Conference
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• 1986.07a
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• pp.531-534
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• 1986

• Proceedings of the KIEE Conference
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• 1984.07a
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• pp.33-35
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• 1984

• Proceedings of the KIEE Conference
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• 1985.07a
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• pp.318-320
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• 1985

• Proceedings of the KIEE Conference
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• 1986.07a
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• pp.538-540
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• 1986

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.919-920
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• 2014

따개비(barnacle)는 선저부에 붙어서 번식하며 딱딱한 석회질 껍데기로 덮여있다. 이로 인하여 선박의 속도를 저하시키고 도료기능을 상실시키는 주요인이 된다. 이를 제거하기 위해 작업자가 직접 액체를 분사하고 브러쉬로 세척해야 한다는 불편함과 위험에 노출되기 때문에 선박작업용 로봇이나 기계들이 많이 개발되고 있다. 현재 연구 중이거나 개발이 완료된 것 중에는 영구자석 또는 전자석 휠을 사용하거나 공압을 이용하여 수직벽면에서 작업을 한다. 특히 공압 방식을 많이 사용하였는데 수직벽면에 로봇이 밀착될 만큼 강한 공압이 필요하게 되기 때문에 부가적인 장치가 많이 필요하다. 본 논문에서는 부가적인 장치를 최소화하고 효과적인 동작을 하기위해 전자석 방식을 선택 하였으며 간편하게 선박의 수직벽면을 작업할 수 있는 전자석 방식의 4륜 로봇을 개발하고자 한다. 선박의 수직벽면 작업용 4륜구동 로봇을 전자석을 이용하여 수직벽면에 부착할 수 있도록 설계하였으며 자력의 세기와 방향을 제어하여 로봇이 선박의 수직면에 밀착되어 자유롭게 이동이 가능하도록 개발 하고자 한다.

• (The)Study of the Eastern Classic
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• no.48
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• pp.117-145
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• 2012

Gongsageunmunrok is a book that was edited by Jung Jae-ryun. He edited and chose some stories good enough to be an role model to descendants. There were all about 310 stories in that book. A forth of them is story about women. There were 4 types of women in the book. cautious women and women to see through a covered fact.Women who have a lot of authority, women who ask a man something, The women cautious women are generally a royal family. They tried to stabilize their royal family and nation. The way to stabilize was a good behavior. Women who have authority harms equitably and authenticity of official business. Requesting women, also, harm fairness of official business. Gongsageunmunrok has many different meanings like the following. First of all, There are women life of royal family's women in the book. Second, It is the book which can be based on later stories about women. Lee Geng-ik(李肯翊) rewrote on Yeunreusilgisul(燃藜室記述). Especially, Kim Reu rewrote the story titled 'Hansukwonjeon(韓淑媛傳)'. Sung Hae-eung,also, rewote Han Bo-hyang's story. Third, There are many stories with the life of court maid. It is useful to study all the life of court maid, political events and current events. Forth, It describes with women's aspects. Therefore many women's clique can be understood. Fifth, It can show women's literary work and a phase of women's literary activity.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.1123-1125
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• 2002

In this paper, interleaved boost converter is applied as a pre-regulator in switch mode power supply. Interleaved Boost Power Factor Preregulator (IBPFP) can reduce input current ripple as a simple voltage control loop only without inner current loop, because input current is divided each 50% by two switching devices. IBPFP can be classified as three cases from duty ratio condition in continuous current mode and be carried out state space averaging small signal modeling. According to modeling, the PID controller is applied and voltage control loop is constructed for suitable design condition. From frequency domain analysis, it is verified that control system is satisfied with design condition of switch mode power supply.

• Proceedings of the KIEE Conference
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• 1993.11a
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• pp.157-159
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• 1993

Recently, in the industrial applications, accurate arc control for welding machine are developed. This paper describes arc control of inverter-fed arc welding machine, and efficiency of inverter-fed arc welding machine. It is shown that the arc pressure and are stiffness of the pulse arc nay be as much as several times that of the equivalent dc are. Finally, the theoretical predictions are compared with test. The potential of such a welding machine is also described.

• Proceedings of the KIEE Conference
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• 1993.11a
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• pp.145-147
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• 1993

This paper described an optimal control technique for position control of an inverter-fed PMSM drive. A control system of PM machine for position, speed and current control based on optimal sliding mode control system is discussed. This is an effective means to keep a system insensitive to parameter variation, disturbance and chattering reduction. The main purpose of the control is to improve the dynamic response of the PMSM with the load of the inertial plant. The optimal sliding mode control strategy is analyzed and the performance is investigated by the computer simulation using actual parameters of a drive system, Simulation results are given and discussed.

• Proceedings of the KIPE Conference
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• 2002.07a
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• pp.69-72
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• 2002

In this study, We proposed high efficiency wind power generator system for induction generator used SVPWM swiching inverter. First, We propose Equivalient Circuit for Induction Generator, it's characteristics equation, and power equation of slip. In addition, we suggest Pick Power Traction Slip control methods, adapted variable wind power system. We study simulation result for the proposed system and output power by slip effect. and we identify SVPWM of suitable wind power system by comparison between SPWM and SVPWM Consequently, we show that the system control result from variable wind power is suitable.