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EPR의 가속 열화에 의한 기계적 특성 및 통계적 평가
김지연,양종석,이길수,성백용,방정환,박대희,Kim, Ji-Yeon,Yang, Jong-Suk,Lee, Gil-Soo,Seong, Baek-Yong,Bang, Jeong-Hwan,Park, Dae-Hee 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.8
In this paper, EPR (ethylene propylene rubber) insulation material was accelerated degradation test at $121^{\circ}C$, $136^{\circ}C$, $151^{\circ}C$, and experiment the typical EAB (elongation at break) at mechanical characteristics analysis. It is shown that the failure-time at the point of 50% of the initial value of Elongation rate to obtain the activation energy. The failure-time was shown each 5,219 hr, 3,165 hr, and 668 hr at three temperatures. In order to derive the activation energy, Arrhenius methodology was applied. Also, we got the Arrhenius plot from three accelerated temperatures. The activation energy values got 0.98 eV from EAB test. The experimental data were evaluated for estimating the probability density, and the suitable distribution by using statistical program MINITAB. It is shown that EAB data by the acceleration thermal degradation is most suitable for the Weibull distribution.
이종센서를 활용한 재난재해 현장에서의 지형인지 기술 개발
서명국(Myoung Kook Seo),윤복중(Bok Joong Yoon),이길수(Gil Soo Lee),신희영(Hee Young Shin),임훈(Hoon Lim),최창수(Chang Soo Choi) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11
Special purpose machines have been recently developed to support rescue and initial recovery in the event of a disaster or accident. The machine can perform various tasks such as holding the obstacle, spreading it on both sides. And It can move the unstable field freely using the four crawlers. On the other hand, the driver is difficult to grasp the topographical information on the moving route only by the visual or image due to the residue of building, dust, weather, etc. This may result in delays in responding to the initial operation of the machine or a second accident such as an overturning. This paper develops terrain cognitive technology using heterogeneous sensors such as image sensor and distance measurement sensor to provide driver with topographical information of movement route. This paper proposes two types topography recognition methods.
이길수,김일환 제주대학교 산업기술연구소 2000 尖端技術硏究所論文集 Vol.11 No.2
This paper presents the new control method of aeronautical ground lighting control system at Jeju airport. In the computer simulation. it is shown how to make a design for high efficiency aeronautical ground lighting control system using PWM inverter and active power filter with PI control. To verify the theoretical analysis, the conventional aero lighting control system using SCR and the proposed control system are built. Results of computer simulation are presented to support discussion.
이길수,김일환 濟州大學校 産業技術硏究所 2000 산업기술연구소논문집 Vol.11 No.2
This paper presents the new control method of aeronautical ground lighting conrol system at Jeju airport. In the computer simulation. it is shown how to make a design for high efficiency aeronautical ground lighting control system using PWM inverter and active power filter with PI control. To verify the theoretical analysis. the conventional aero lighting control system using SCR and the proposed control system are built. Results of computer simulation are presented to support discussion.