• Proceedings of the KSR Conference
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• 2008.11b
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• pp.518-523
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• 2008

Using network communication, KTX OBCS is KTX's core device which inspects operation status of various electric equipments and supports driving command, train control, train's maintenance, train crew's driving. Since this device is manufactured as specialized system, being dependent on TGV manufacture specification and France's high speed train operation method, actual technic transfer is difficult. Therefore, there are many difficulties, since most of interface signals are connected with OBCS when function improvement, maintenance, various electric equipments(propulsion control device, auxiliary power supply device, door control device etc.) are replaced with localized ones, which are required in operational view after introduction of KTX. Ergo, this study would like to contribute to function improvement and maintenance's efficiency, furthermore to realize technical independence, escaping from dependency of developed foreign technology in high speed train and electric equipments, through KTX OBCS' function analysis and mutual interface information analysis with peripheral device(driver console, PID system, fault display device, various electric equipments).

• Journal of Digital Contents Society
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• v.11 no.4
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• pp.537-543
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• 2010

According to software growth, also software maintenance has been continuously improving. In addition, the existing concept of correct maintenance demands operational management and improvement of service. However, we have various limitation matters to reflect the requirements of service base for maintenance accomplishment. Therefore, we need the study of the service based process for solving such a problem. In this paper, we propose a Service based Software Maintenance Process. Proposed process based on ISO12207 standard for software development and maintenance and compares it with the service based representative standards. In a related works, we study activity of $SM^{MM}$, ITSCMM, ITIL and find out activities to be concerned with and compare it with activity of ISO 12207 and distinguish the maintenance process activity of the service base from maintenance activities. And then, we propose a service management stage. It define four activities and eight artifacts. Finally, we validate the result by comparing the proposed process with a general service operational process.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2015.10a
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• pp.338-340
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• 2015

선박안전운항을 위하여 설치하여 운영 중인 항로표지시설은 도서벽지 설치 운영에 따른 다양한 위해요소(기상, 접근성 등)로 인해 유지보수가 매우 어려운 시스템이다. 따라서, 최근 사례 및 기술검토를 통해 보다 안정적이고 체계적으로 운영이 가능할 수 있도록 항로표지 운영개선방안을 제시하고자 한다.

• Journal of the Korean Society for Railway
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• v.13 no.2
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• pp.159-165
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• 2010

In this paper the TRMS (Tilting Rolling-stock Maintenance System) that applies the concept of RAM (Reliability, Availability, and Maintainability) and RCM (Reliability Centered Maintenance) to Preventive and Corrective Maintenance Policy for TTX (Tilting Train Express) will be discussed. We will briefly introduce the RCM concepts and discus show these concepts and procedures are implemented in the TRMS S/W. In the TRMS S/W there are four modules, System and Operations Information Module, FMECA(Failure Modes, Effects, and Criticality Analysis)module, RAM Information Module, and RCM Analysis Module. The System and Operations Information Module provides the user interface for collection of systems and operations related data and the FMECA module provides a groundwork for the RCM analysis. The algorithms to calculate the reliability and failure rate for Weibull distribution and formulae to calculate the task intervals and task costs are proposed in the RAM and RCM Analysis Module respectively. There is a good possibility of applying RCM to other rolling stock maintenance systems if the benefit that RCM can brings to the maintenance world is fully recognized.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1746-1749
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• 2012

국토해양부는 일반국도의 적정한 도로포장 유지보수를 통한 예산의 효율적사용을 위해 일반국도 포장관리시스템(PMS)을 운영하고 있으며, 일반국도 포장상태 조사 및 유지보수실적을 관리를 위하여 포장 자료 관리용 엑셀파일을 데이터베이스로 구축하였다. 본 연구에서는 기존 일반국도 포장관리시스템(PMS)운영의 한계를 분석하고 현장의 명확한 판단 기준을 제시 할 수 있는 시스템의 개선방안을 기술하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2021.11a
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• pp.27-28
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• 2021

항로표지는 무인으로 운영이 되며 즉각적인 유지 보수등이 어려워 전력 관리 및 안전 운영이 중요한 요소가 된다. 기존 2차 전지관리 시스템의 단점을 보완할 수 있는 기술을 확보 하여 안전한 자율 운영이 가능한 방법을 제시 하고자 한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.5
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• pp.879-890
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• 2017

The US Pavement Design method (AASHTO) and HDM-4, a road pavement maintenance decision system, are not suitable for domestic pavement design, construction and maintenance. KPRP(Korea Pavement Research Program) has been developed to reflect Korea's environmental conditions and vehicle characteristics, thereby, extending pavement life. The main objective of this study is to select the best alternative through Life Cycle Cost $CO_2$ (LCCC) calculations among three representative maintenance strategies using KPRP design software since the environment cost resulting from the extended pavement life will also differ. The analysis of this study illustrates that cumulative carbon emissions for 40 years in alternative 2 (Cutting and Overlaying at Year 30) is the lowest option among them, and the basic cost of $CO_2$ emission by various road maintenance and repair work can be used for suggesting an optimal maintenance strategy for highway agency.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.92-94
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• 2018

항로표지 관리운영시스템은 항로표지 상태정보 및 해양기상정보의 감시제어 및 정보 제공 등을 위하여 지방청별로 설치 시기 및 용역사에 따라 다양하게 개발되어 운영하고 있다. 항로표지 관리운영시스템을 도입한 지방청들은 표준화되지 않은 관리운영 S/W 및 데이터 베이스를 현장 상황에 맞게 변경하여 각 지방청별로 관리운영 S/W의 유지보수 예산의 중복투자 및 관리자의 관리 운영측면에서 어려움이 있다. IALA(국제항로표지협회)는 해사 안전 분야 데이터 교환 국제표준인 S-100에 따른 항로표지 정보 표준인 S-201 규격의 개발이 진행중이다. 이에 e-Navigation 도입을 대비하여 고도화된 항로표지 정보의 체계적이고 원활한 제공을 위해 S-201을 적용한 일원화된 항로표지 관리운영시스템의 표준 S/W 개발이 필요하다. 본 연구에서는 S-201을 적용한 DB 구조를 설계하였으며, 사용자 편의성 및 시스템 관리 효율성을 개선한 새로운 항로표지 관리운영시스템 S/W를 개발하고 있다.

• The Journal of the Korea institute of electronic communication sciences
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• v.18 no.4
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• pp.555-562
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• 2023

The Railway Safety Act of 2014 strengthened the 'Railway Safety Management System' to establish autonomous safety management for railway operators and railway facility managers. Accordingly, it is required to establish and implement risk assessment and safety measures for risk management. However, the current risk assessment system is carried out at the fragmented safety management level within individual fields, which has caused difficulties in establishing and implementing risk assessment and safety measures. In addition, the technical standards of the safety management system stipulate that risk assessment of railway operators is mandatory, so standardized standards for risk assessment of railway facilities and railway vehicle maintenance are needed. Therefore, in this paper, we first verified railway risks by analyzing railway accident data for the last 10 years, and proposed a standardized framework to effectively assess and manage risks through a case study of a condition-based smart maintenance system developed based on railway vehicle maintenance data.

• Proceedings of the KIEE Conference
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• 2003.04a
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• pp.426-428
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• 2003

도시철도유지보수체계 정보화시스템 연구에서 예방정비시스템 구축을 위해 RCM 연구를 진행하고 있으며, 특히 예방정비에서 RCM은 지난 십 수년간 정비보수(Maintenance) 분야의 관리 기법으로 다른 어느 분야의 관리 기법 보다 한층 탁월한 발전을 하고 있다. 특히, 도시철도분야는 매우 복잡한 시스템으로 유지보수에 대한 신뢰성과 효율성 및 안전성을 가장 먼저 확보하여야 한다. 이를 위해서 본 논문에서는 여러 분야에서 오랜 기간동안 운영한 결과 상당한 유익점이 있다고 증명된 신뢰도 중심 정비 (Reliability Centered Maintenance: RCM)에 대한 소개를 하면서 도시철도 시스템에 대한 적용하고자 한다.