• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1511-1516
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• 2011

The maintenance of the turnout is composed of signal field and track field on business, the electrical and mechanical field on system. adjustment and maintenance carry forward through coordination with these fields. In the case of turnout equipment used in a first phase of Seoul-Busan high-speed train, it is treated by classifying as mechanical adjustments and electrical adjustments. Mechanical adjustment is conducted with focus on fine adjustment to meet maintenance standards limits(1mm or less) about interval of basic rail and tongue rail about each part of track transition equipment. This refers to mechanical adjustments performed mainly with physical changes and movement characteristics between basic rail and tongue rail by considering the overall environment surrounding track side of section installed track transition equipment. However, these series of maintenance are conducted in state that high-speed train is not in the process from 1 am to 4 am at night, but common workers for maintenance are not familiar with the operation and checking about various situation, and the workers are even insufficient. Maintenance training using mixed reality is conducted in the place of business, we tried to overcome several problems of safety and time reduction through this training.

• 한국가스학회지
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• 제21권4호
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• pp.16-20
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• 2017

현재의 유지보수 시스템은 고정 설비 및 회전기계의 유지 및 보수에 대한 명확한 기준이 제시되지 않고 있으며, 고장이 발생되더라도 근본적인 원인분석 없이 교체 및 수리가 이루어져 더 큰 사고를 초래할 수 있는 환경이다. 따라서 본 연구에서는 예방보전을 통해 사전에 점검하고 유지 보수할 수 있도록 신뢰성 중심의 유지보수 시스템의 절차를 개발하였고, 향후 유지보수에서 설비의 고장형태에 따라 문제 발생 설비를 집중 관리함으로써 중대산업사고의 발생을 사전에 예방하고 관리할 수 있는 절차를 제시하고자 하였다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 춘계학술대회
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• pp.172-174
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• 2021

기존 산업에서는 제한적 모니터링 및 정비로 인한 불필요한 유휴 시간 발생 등의 예방정비의 형태로 보전을 실시하였다. 하지만 4차 산업혁명이 도래되고 광업, 제조, 석유 및 가스, 상업적 농업을 포함한 많은 산업 분야에서 실시간 모니터링이 가능하고, 정비로 인한 유휴 시간의 최소화를 원하게 되었다. 특히, 설비 및 장비가 고장 나기 전 고장을 예측하여 유지 보수함으로써 비용을 절감하고 운영 효율성을 극대화 할 수 있는 예지보전에 대한 관심이 높아지고 있다. 본 연구에서는 스마트 팩토리의 장비의 이상 상태를 사전에 검증이 가능하고 이상 상태를 실시간 모니터링이 가능한 예지보전 기술에 대해 살펴본다.

• 대한기계학회논문집A
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• 제34권9호
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• pp.1281-1286
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• 2010

발전소를 비롯한 각종 플랜트 설비는 많은 기계설비들로 구성되어 고장이 발생할 경우, 고장이 발생된 설비와 시간을 명확하게 파악하기가 쉽지 않다, 또한 고장발생시 정비비용 증가와 함께 설비의 이용률이 감소하여 막대한 경제적 손실이 발생한다. 발전소는 각종 계측센서를 설치하여 설비를 상시 감시하고 있으며, 경고발생 이전 지시치의 변화를 관찰하여 설비의 이상상태를 자동 감지하는 신호기반 고장 조기경보 시스템도 설치된 발전소도 있다. 그러나 고장경보 시스템은 이상신호 발생을 인지하여 설비의 이상상태 여부는 알려주지만 고장원인과 중요도에 대한 정보는 제공하지 않는다. 본 연구에서는 고장분석 기능을 가지고 있는 RCM(Reliability Centered Maintenance) 분석 시스템과 고장경보시스템을 연계하여 설비의 이상신호로부터 고장원인과 정비방법에 대한 정보를 제공하는 고장예측시스템을 개발하고자 한다.

• 국제학술발표논문집
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• The 2th International Conference on Construction Engineering and Project Management
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• pp.837-847
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• 2007

The study focused on the evaluation of maintenance management strategies used in public hospital buildings in Lagos state. It also assessed the labour composition for maintenance operations. In achieving these objectives, opinions of maintenance officers of ten (10) different hospitals in different local government areas of the state were sampled through well structured questionnaires. The data collected were analyzed using descriptive and inferential statistics. From the analysis, the study revealed that majority of those public hospitals do not have specific budget for maintenance programmes, maintenance policies, maintenance log book and maintenance manual to guide the operatives. About 98% of them do not understand the type of maintenance strategy being used for their maintenance operations. 78% of the maintenance work are only executed when there is a breakdown or in response to user's request. For labour composition, the cleaning of interior and exterior of the building, inspection of building elements, repairs and replacements of building elements are mainly carried out by in-house staff, while the repair and replacement of equipment is by outsourcing. The study also revealed that using in- house staff, reduces costs and provides a higher security while outsourcing provides more flexibility in staffing reduces equipment expenditures and provide better access to special skills. The study recommended proactive measures to provide necessary training and support for maintenance staff and users of these facilities and a means of securing sufficient funds for maintenance programmes.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2007년도 춘계학술대회논문집
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• pp.453-456
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• 2007

The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2006년 제4회 한국유체공학학술대회 논문집
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• pp.57-60
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• 2006

The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

• 한국농공학회논문집
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• 제50권6호
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• pp.75-81
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• 2008

The purpose of this study was to develop an optimum equipment model considering various objective functions and variables of agricultural reservoir. Traditional optimum function for feasibility assessment is based on economic benefit, but we tried new approach of feasibility assessment based on the number of beneficiary. The data of Yuraimi reservoir and Yongbong reservoir in Yesan-gun such as numbers of related people, construction costs, safe diagnosis have been gathered for applying developed model. Data are used for determining optimum strategy with restricted cost. For verifying results of optimum maintenance, real maintenance data of Yuraimi reservoir were compared with simulated strategy. Results show that simulated maintenance strategies are 3 times more effective than real maintenance data.

• 한국유체기계학회 논문집
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• 제13권1호
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• pp.29-34
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• 2010

The purpose of this study is to explain the importance of Vibration Monitoring Device by introducing an example of Predictive Maintenance System using Condition Monitoring System of Hydro-turbine generator. Confirming vibration of generation equipment is commissioning procedure during equipment completion for checking guaranteed items. Data from Generator output range are used to determine output band to continue the performance of equipment. The Vibration Monitoring System is not absolute method of maintenance, but if it is used well with expert, it will be visible, data-analyzed, scientific maintenance more than others. And also, Condition Monitoring System is very important for remote controlled small hydro-power plant although most of it is installed in Large hydro-power plant.

• 전기학회논문지
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• 제62권8호
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• pp.1177-1183
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• 2013

In this paper, the analysis of inspection period bases on reliability is suggested in the field of traction power system. Even though there are several maintenance models, the most commonly used maintenance assessment has been focused on time based maintenance in real traction power systems. The maintenance intervals are selected on the basis of long-time experience. It ensures high availability and exact planning of staff. Reliability centered maintenance, which evaluates criticality and severity of each failure mode, achieves the operation, maintenance, and cost-effective improvement that will manage the risks of equipment. This paper deals with electrification in railway inspection frequency and applied reliability based inspection frequency instead of constant intervals. The distribution function of failure rate in traction power system belongs to Weibull function. Also, the fault data and the number of installed equipments for electrifications are collected. The failure history is investigated and classified in detail. Though these complicated procedures, it contribute to extend equipment lifetime and to reduce maintenance costs.