• Proceedings of the KIEE Conference
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• 2007.07a
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• pp.2054-2055
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• 2007

이 논문에서는 철도전력시스템에서의 유지보수를 위한 고장률 분석에 관하여 설명하고 있다. 유지보수와 관련된 문제들은 시스템의 다른 부분과도 연관이 있어 기계적 사고의 위험성을 증가시킨다. 그러므로 설비는 교체와 예방정비를 겪게 된다. 여기서는 유지보수의 방법을 욕조곡선을 기반으로 정할 것이다.

• Proceedings of the Korean Society of Disaster Information Conference
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• 2022.10a
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• pp.223-224
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• 2022

노후주거시설의 개보수의 필요성이 대두 되고 있으나 관련법규의 제약에 의해 내 외부 미관수선 정도에 그치고 있는 것이 현실이다. 그래 조금 나은 동선과 공간으로 수선시 법을 위반하여 불법 건축물로 낙인되어 지는 것이다. 경제적인 여유가 없는 노령층등 사회적 약자가 거주하는 공간은 더욱 더 열약하여 화장실, 주방, 수평이동 통로, 승강기등의 편의시설과 붕괴, 침하, 화재, 폭발, 오염등의 안전을 위협하는 위험요소의 제거등이 당장 필요하여도 미봉에 그치는 경우가 다반사이다. 또 이러한 노후 건물의 개보수는 신, 개축 보다 어렵고 비용도 많이 들면서 그 효과도 미미한 것이 사실이나 당장 신, 개축하기에는 관련 법규에 저촉되거나 주변 여건에 부합하지 않아 실시 할 수 없는 경우가 많아 이를 개선하고 합리적인 롤 모델을 만들고 필요하다면 관련법령도 정비할 필요가 있는 것이다. 노후되지 않아도 현시점에서 생활의 불편함을 느껴 개선할 필요가 있는 경우도 관련 법규의 유연함이 필요할 것이다. 본 연구는 이러한 노후 주거 시설 및 현실 여건에 맞지않는 주거 시설을 보다 쉽고 합리적으로 개 보수할 수 있는 여건이 조성되도록 관련 건축법령의 개선, 또 경제적 여유가 없는 저소득층의 개보수여건을 개선할 수 있는 정부지원방안, 이러한 노후 주거시설의 개보수가 부동산 시장에 어떠한 영향을 초래할 수 있는지를 기존 연구들과 비교하여 합리적인 방안을 도출하고저 함.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.30 no.1D
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• pp.89-98
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• 2010

The goal of this study is to investigate the achievement of street improvement projects based on district unit plans aiming at improving the urban streetscape. Post assessments are conducted for three streetscape improvement projects - Noyu street improvement project, Hanaro street improvement project next to Sungshin women's university, Chatgoshipun street improvement project in front of Ehwa women's university. The results of the post assessment indicate that the initial quality of streetscape has been improved after the projects. The long-term sustainability of the streetscape, however, was not achieved for the street improvement project applied at the street next to Sungshin women's university due to the lack of support from the community. It is found that the key component of success for the street improvement project is the strong cooperation between public and private parties.

• Journal of the Korea Society of Computer and Information
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• v.27 no.1
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• pp.51-59
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• 2022

As the weapon system's dependence on software functions increased, software became a key factor in controlling the weapon system. In addition, as software development becomes more important domestically and internationally, software verification becomes an issue. The recent defense market has recognized this point and is demanding a plan for weapon system software maintenance. In this paper, we propose a weapon system software maintenance plan using Automatic Test Equipment. The specific method is to use a simulator to check the software function and identify failure cases. This is an effective way for developers to reduce the Total Corrective Maintenance Time(TCM) of the weapon system by reducing the time it takes to identify failure cases. It has been proven that the proposed Automatic Test Equipment can achieve software maintenance and excellent Maintainability and Operational Availability compared to the existing ones.

• Journal of the Korean Society for Railway
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• v.7 no.3
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• pp.245-250
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• 2004

The safety of staff, customers and of general Public in general viewed as one of the most important requirements in the urban transit. The maintenance computerization system for car of urban transit is a part of standardization and development of urban transit system, and We have been performed the establishment of maintenance computerization system from 2001 to 2005. The RAMS (reliability, availability, maintainability and safety) estimation for maintenance computerization system are utilized in a variety of computerization system for user's convenience and safety in maintenance. Ever since its inception though, the urban transit has searched for ways to improve reliability, availability, maintainability and safety of the railway subsystem. Provision of a reliable maintenance system include RAMS of the vehicles plays a very important role in achieving a safe system.

• Journal of the Korean Society for Railway
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• v.11 no.3
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• pp.240-247
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• 2008

Recently, railway corporations have built maintenance information systems and collected failure and maintenance data. For example Seoul Metropolitan Rapid Transit Corporation (SMRT) built the Electric Motor Unit-Information System (EMU-IS) which is the first maintenance information system in Korea. It has been operated from August, 2000. This paper deals with a case study on determining maintenance interval through reliability analysis using EMU-IS fault data. Door system is considered for the case study in which reliability is evaluated for operating time and distance and the overhaul interval is determined.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.2
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• pp.1-7
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• 2016

Although the second driving device of KTX, which consists of the wheel and the axle reduction gears unit, is a mechanically integrated structure, its preventive maintenance (PM) requires two separate intervals due to the different technical requirements. In particular, these subsystems perform attaching and detaching work simultaneously according to the maintenance directive. Therefore, to reduce the unnecessary amount of PM and high logistic availability of the train, it is important to optimize PM with regard to reliability-centered maintenance toward a cost-effective solution. In this study, fault tree analysis and reliability of the subsystems, considering the criticality of the components, were performed using the data derived from field data in maintenance. The cost optimization of the PM was derived from a genetic algorithm considering the target reliability and improvement factor. The cost optimization was derived from a maximum of the fitness function of the individual in generation. The optimal TBO of them using the genetic algorithm was 2.85x106 km, which is reduced to approximately 21% compared to the conventional method.

• 보일러설비
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• s.78
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• pp.64-67
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• 2000

장마가 막 지나가고 실내의 눅눅한 습기를 없애려고 보일러를 잠시 킨 후 보일러는 긴 휴지기에 들어 간다. 24시간 계절과 상관없이 오랫동안 가동되는 보일러를 사용하게 되면 여러 가지 고장이나 손상이 생기기 쉽다. 이런 것들을 미연방지하거나 또는 고장이나 손상이 확대 되기전에 신속히 보수하여 항상 보일러를 정상상태로 유지시키는 것을 보전이라고 한다. 보일러의 보전방법에는 여러 가지가 있지만 여기서는 보일러의 정비 및 휴지에 관해 설명하겠다.

• Electric Engineers Magazine
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• s.374
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• pp.38-39
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• 2013

2013. 09. 13(금) 20시 35분경, 부산시 영도구에 소재한 ${\bigcirc}{\bigcirc}$조선소 협력업체에서 선박(오션에이스) 선미 좌현하부의 구멍 난 부위를 보수하는 작업 중 보조 작업자(남, 56세)가 피복이 손상된 이동용 전선 충전부에 접촉되어 감전 사망한 재해임.

• Journal of the Korean Society of Marine Environment & Safety
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• v.27 no.1
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• pp.53-59
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• 2021

The marine transport industry generally applies new technologies later than other transport industries, such as airways and railways. Vessels require efficient operation, and their performance and lifespan depend on the level of maintenance and management. Many studies have shown that corrective maintenance (CM) and time-based maintenance (TBM) have restrictions with respect to enabling efficient maintenance of workload and cost to improve operational efficiency. Predictive maintenance (PdM) is an advanced technology that allows monitoring the condition and performance of a target machine to predict its time of failure and helps maintain the key machinery in optimal working conditions at all times. This study presents the development of a marine predictive maintenance (MPdM; maritime predictive maintenance) method based on applying PdM to the marine environment. The MPdM scheme is designed by considering the special environment of the marine transport industry and the extreme marine conditions. Further, results of the study elaborates upon the concept of MPdM and its necessity to advancing marine transportation in the future.