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자갈도상 급곡선(R=60m)부 정척레일 이음매부 유지관리 연구
김현오(Hyunoh Kim),양회성(Yang Hoe Sung),백찬호(Chanho Paik),박용걸(Chanho Paik),강윤석(Seok Ho Kim) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
도시철도 건설 시 측선의 최소곡선반경 기준은 별도 규정이 없고 지자체장의 승인으로 설치되고 있다. 국내 도시철도 운영기관 중 최급곡선(R=60m)이 부설되어 운영중에 있고, 운용 중 이음매부의 계속적인 줄틀림 발생으로 유지관리에 어려움이 발생되어, 이를 해소하기 위한 방안으로 정척레일(20m) 이음매부 침목에 버팀재를 설치하여 레일 궤도선형을 유지하고자 한 연구 사례를 제시하고자 한다. When constructing the urban railway, there is no provision about the minimum radius of curve which is admitted by the chief of local government. Sharp curved(R=60m) track has been installed in domestic and operated by a urban railway corporation. It has raised a track alignment irregularity which made it hard to operate and maintain. This study aims to show example of experience which is for enforcing the intension of a lateral track force using a strut in rail joint.
김현오(Hyunoh, Kim),이강(Ghang, Lee),조재현(Jehyun, Cho) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.하계
This study surveys the construction robots developed for the past twenty years through literature review and web search. In these two decades, many studies have been conducted in construction automation, and recently, three-dimensional (3D) printing and unmanned aerial vehicles (UAVs) have become new trends. We collected and analyzed 54 cases conducted in the last twenty years in order to technology and development trends. We classified the construction robot research according to the standard construction work classification. In addition, we evaluated development level through comprehensive of four levels: research stage, research completion stage, practical application stage, and commercialization stage. The analyzed results show that only a few projects succeed in commercialization or practical application limited to only three work categories. Eight counts of earth excavators, four counts of reinforced concrete construction, and four counts of steel structure construction work. Moreover, all research cases, which we collected, focused only on the development of the individual robots. In conclusion, the requirements for the development of integrated control systems or coordination systems are encouraged to automation research in terms of leading successful cases.
철도 정척레일 자갈도상 급곡선(R=60m) 이음매부 유지관리 연구
김현오(Hyunoh Kim),양회성(Yang Hoe Sung),백찬호(Chanho Paik),김석호(Seok Ho Kim) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
도시철도 건설 시 측선의 최소곡선반경 기준은 별도 규정이 없고 지자체장의 승인으로 설치되고 있다. 국내 도시철도 운영기관 중 최급곡선(R=60m)이 부설되어 운영중에 있고, 운용 중 이음매부의 계속적인 줄틀림 발생으로 유지관리에 어려움이 발생되어, 이를 해소하기 위한 방안으로 정척레일(20m) 이음매부 침목에 버팀재를 설치하여 레일 궤도선형을 유지하고자 한 연구 사례를 제시하고자 한다. When constructing the urban railway, there is no provision about the minimum radius of curve which is admitted by the chief of local government. Sharp curved(R=60m) track has been installed in domestic and operated by a urban railway corporation. It has raised a track alignment irregularity which made it hard to operate and maintain. This study aims to show example of experience which is for enforcing the intension of a lateral track force using a strut in rail joint.
32-bit 임베디드 시스템을 이용한 ECU Fail-Safe 시스템 구현
박진현(Jinhyun Park),김현오(Hyunoh Kim),전재욱(Jaewook Jeon),황성호(Sung-ho Hwang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
As strengthen the environmental protection law, development of alternative fuel vehicle is essential, for example, hybrid vehicle, electric vehicle, fuel cell vehicle. For development of these vehicles, electronic control is essential to improve performance of vehicle. In this paper, ECU Hardware-in-the Loop Simulation system is developed, which is based on 32-bit embedded control unit. If the brake system is out of oder, fatal accidents could break out. Therefore, The Fail-Safe Systems for BCU and TCU are accomplished, which have self diagnosis system.
전기자동차의 전자브레이크의 분배 알고리즘 적용을 통한 특성 연구
조배균(Bae-kyoon Cho),김현오(Hyunoh Kim),박진현(Jinhyun Park),황성호(Sung-ho Hwang) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Because of environmental pollution and depletion of fossil fuels, hybrid and electric vehicles are being developed. Features of hybrid and electric vehicles is using electric motor as power source. Characteristic of these cars with high fuel efficiency and regenerative braking in order to implement it for research and study of electronic brakes are going to increase even more. In this paper, these regenerative braking and electronic brake for the development of MATLAB / Simulink and RT-Lab was built using the HILS environment. Electronic brake torque distribution logic to develop and apply, not only Regenerative braking, but also According to the distribution of braking, ride comfort quantitative assessment index a measure of the study was about comfort.
철도 자갈도상 궤도틀림의 줄맞춤을 위한 사장식(교차법) 적용사례
양회성(Yang Hoe Sung),김현오(Hyunoh Kim),백찬호(Chanho Paik),김석호(Seok Ho Kim) 한국철도학회 2015 한국철도학회 학술발표대회논문집 Vol.2015 No.10
철도의 자갈도상 궤도틀림은 열차운행과 환경적 요인으로 계속적인 틀림이 발생한다. 이러한 궤도틀림의 종류로는 궤간틀림, 줄틀림, 면틀림, 수평틀림, 평면성틀림으로 대별하여 유지관리하고 있다. 특히 줄틀림은 장기적인 운행과 함께 부분적인 변형이 아닌 넓은 구간에서의 줄틀림이 발생하는 경우가 많고, 이를 정정하는데에는 최초 건설 당시와 같이 측량에 의한 정밀정정에는 한계가 존재한다. 현장여건에게 정정하는 방법으로 곡선종거에 의한 사장식(교차법) 정정법이 존재하는데, 이를 적용한 사례를 소개하고자 한다. Track irregularities of a ballst bed track proceed continuously due to train service and environmental factors. Track irregularities can be categorized into gauge, lining, cross level and twist irregularity and maintained according to these classification. Among these irregularities, the irregularity of lining goes along not locally but widely due to a long-term operation. And the precision adjustment by measurements in construction phase is limited to adjust the irregularity of lining. There is a chord-to-rail methode (Transposition) by a curved-versine to adjust the irregularity of lining under the site condition. This paper introduce the case where the chord-to-rail method is applicated to adjust the irregularity of lining.
2004 년부터 2015 년까지 건설프로젝트 단계별 국내 BIM관련 국책과제 동향 분석
조재현(Jehyun, Cho),이강(Ghang, Lee),김현오(Hyunoh, Kim) (사)한국CDE학회 2015 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2015 No.하계
This study surveys national research projects in South Korea from 2004 to 2015 related to building information modeling (BIM) and analyzed the trend by project phase. For the analysis, we have collected 136 BIM-related research projects in South Korea from the National science & Technology Information Service (NTIS) website, which provides information about national research and development projects. The research projects were categorized by construction project phase. A keyword analysis has been conducted to understand detailed BIM research areas. The phase analysis shows that over 60 percent of the BIM-related research projects in South Korea focus mainly on the design phase. The keyword analysis shows that a majority of the BIM research projects have been conducted in the areas of ‘decision making support’, ‘automated quality assessment’.