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AGV 용 서스펜션의 진동 모드에 관한연구 : 중력 가속도가 5G인 경우 A Case of Gravity Acceleration is 5G
주만식,김민주,이승수,최영철,추정근,김중완,전언찬 한국공작기계학회 2000 한국공작기계학회 추계학술대회논문집 Vol.2000 No.-
This study is to choose the most proper model for AGV throughout simulation of behavior of suspension to reduce trial and error because there is no AGV treating heavy weight at harbor loading and unloading at home. Therefore, we estimate the vibration modes of the various suspension applied to AGV, which is over 75 ton included the weight of two containers on 5G using the Matlab, one of the simulation programs
중력가속도의 변화에 따른 자동운반차량용 서스펜션의 진동모드에 관한 연구
주만식,김민주,이승수,최영철,추정근,김중완,전언찬 동아대학교 해양자원연구소 2000 硏究論文集 Vol.13 No.1
This study is to choose the most proper model for AGV Throughout simulation of behavior of suspension to reduce trial and error because there is no AGV treating heavy weight at harbor loading and unloading at home. Therefore, we estimate the vibration modes of the various suspensions applied to AGV, which is over 75 ton included the weight of two containers using the Matlab in the case of G and 5G, one of the simulation programs.
A Case of Microscopic Polyangiitis showing Subdural Effusion and Dural Inflammation
Chu, Min Kyung,Min, Soo Ki,Yu, Kyung Ho,Ma, Hyeo Il,Kim, Yun Joong,Kim, Joo Yong,Yun, Sung Hee,Kim, Cheol Ho,Lee, Byung Cheol 대한신경과학회 2005 대한신경과학회지 Vol.23 No.6
Microcopic polyangiitis (MPA) is a systemic disorder affecting small vessels. In MPA, the central nervous system involvements have rarely been reported. We experienced a case of MPA with subdural effusion and pachymeningitis in a 50-year-old woman. The diagnosis of MPA was made by the presence of mononeuritis multiplex, hematuria, pachymeningitis, and p-ANCA seropositivity in this patient. Subdural effusion was of exudates and an active suppurative inflammation was observed on the dural biopsy.
Chu, Cheol-Min,Kim, Jae-Chul,Yun, Sang-Yun The Korean Institute of Electrical Engineers 2009 Journal of Electrical Engineering & Technology Vol.4 No.1
The purpose of the this paper is to make decision of the maintenance priority of power distribution system using Time-Varying Failure Rate(TVFR) with interruption cost. This paper emphasizes the practical use of the reliability indices and interruption cost. To make a decision of maintenance priority on power distribution system equipment, the quantification of the reliability level should be represented as a cost. In this paper, the TVFR of power distribution system equipment applied in this paper utilizes analytic method to use the historical data of KEPCO. From this result, the sensitivity analysis on TVFR of equipment was done for the priority, which represents that high priority of the equipment has more effect on system reliability, such as SAIDI or SAIFI, than other equipment. By this priority, the investment plan is established. In this result, customer interruption cost(CIC) could be extracted, and CIC is used as weighting factor to consider a importance of customer. After that, the result calculated the proposal method in this paper is compared with other priority method, such as lifetime, failure rate or only sensitivity.
Cheol-Min Chu,Jae-Chul Kim,Sang-Yun Yun 대한전기학회 2009 Journal of Electrical Engineering & Technology Vol.4 No.1
The purpose of the this paper is to make decision of the maintenance priority of power distribution system using Time-Varying Failure Rate(TVFR) with interruption cost. This paper emphasizes the practical use of the reliability indices and interruption cost. To make a decision of maintenance priority on power distribution system equipment, the quantification of the reliability level should be represented as a cost. In this paper, the TVFR of power distribution system equipment applied in this paper utilizes analytic method to use the historical data of KEPCO. From this result, the sensitivity analysis on TVFR of equipment was done for the priority, which represents that high priority of the equipment has more effect on system reliability, such as SAIDI or SAIFI, than other equipment. By this priority, the investment plan is established. In this result, customer interruption cost(CIC) could be extracted, and CIC is used as weighting factor to consider a importance of customer. After that, the result calculated the proposal method in this paper is compared with other priority method, such as lifetime, failure rate or only sensitivity.
분산전원을 고려한 차세대 배전망 운영 및 제어방안 수립 검토
추철민(Cheol-Min Chu),김준일(Jun-Il Kim),조진태(Jin-Tae Cho) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
최근 전력계통의 화두가 되고 있는 스마트 그리드는 화석연료 사용에 의한 온실가스 배출을 최소화하면서 지속적인 전력수급의 안정성을 확보하기 위한 방안이다. 이를 위해 풍력 및 태양광 등의 신재생에너지원을 비롯한 분산전원의 계통 유입이 가속화 될 전망이며 직접 영향을 받게될 배전계통의 운용 및 제어를 위한 스마트 배전운영시스템의 구축이 시도되고 있다. 본 논문에서는 스마트 배전운영시스템이 적용될 분산전원 및 마이크로그리드 등이 연계된 차세대 배전망의 운영 및 제어방안을 다루었다. 특히 다수의 분산전원이 배전계통에 연계되었을 때 고려되었을 시 배전계통의 전압측면에서 분산전원의 영향을 분석하였다. 또한 분산전원 중 PV에 대한 출력평준화를 통한 전압 안정화를 고려하였으며 분산전원의 연계용량에 따른 제어방안을 검토하였다.
추철민(Cheol-Min Chu),이병성(Byung-Sung Lee) 대한전기학회 2010 전기학회논문지 Vol.59 No.10
This paper presents the survey results of the interruption on domestic customer, especially commercial, with primary focus on the cost are presented. General method utilized in quantifying the benefit of reliability on power system is to estimate the Customer Interruption Cost(CIC) associated with the electric service interruption. According to change the circumstance of electricity market by the deregulation and the introduction of new technology, reliable and accurate CIC is required for estimate the applied plan and technology under the circumstance. This paper presents the commercial customer interruption cost is estimated by the survey conducted by KEPCO in 2009. To collect the customer interruption data for calculation of CIC, the survey is conducted. The survey targeting commercial customer around the branch-offices under twelve regional headquarters of KEPCO was carried out.