• Aerospace Engineering and Technology
• /
• v.5 no.2
• /
• pp.188-194
• /
• 2006

This paper deals with the development of Engineering Model for the TCU( Thruster Control Unit) and simulation system of the reaction control system using cold gas. TCU communicates with TLM(Telemetry) and ground control console so that it transmits monitoring data of pressures and temperatures for reaction control system. The cpu/communication board performs MIL-STD-1553B communication, RS-422 communication, data input/output processing and program loading to EEPROM. We applied Intel 80386DX Microprocessor, 256Kbytes EEPROM and 256Kbytes SRAM for program storage and execution. Also, we developed the direct access interface circuit to EEPROM and simulation system for TCU.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.14 no.7
• /
• pp.3444-3449
• /
• 2013

The control module controlling points has become high-tech. but the introduction of relevant company's inspection intervals and methods, and the adoption of the way which is used in relay interlock system became the cause of a failure by excessive and incorrect maintenance. The Human error in failure recovery process can cause vital accidents including train derailment, the points monitoring system could prevent this problem by monitoring points' operation condition in real time. After conducting the changed inspection intervals that applied the results of the criticality of each failure type, MTBF, MTTR, availability, maintainer's opinion, the work became simplified, and, the failure did not occur for 4 consecutive years in contrast to the previous annual average of 11 failures.

• Journal of the Korean Geosynthetics Society
• /
• v.13 no.4
• /
• pp.133-141
• /
• 2014

This study was carried out to establish the database system by using the safety inspection and in-depth inspection results for infrastructures such as bridges, tunnels, dams, and water supplies. A classification system of each facility was proposed by standardizing items for inspection & diagnosis in order to automatize work process. Also, it justifies data structure based on database from pre-investigation to field survey, evaluation of facilities, and report making. In addition to this, it suggests improvement plans of relative regulations and guidelines such as Facility Management System(FMS), operational regulation, and inspection detailed guideline to make inspection result database of infrastructures which can be used effectively.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.42 no.3
• /
• pp.427-438
• /
• 2022

With the recent growing importance over safety management the need for advanced and technical approaches for on-site safety inspection methods has increased. Railway construction is subject to its own particular set of temporal and spatial challenges due to its unique facilities and equipment. This study aimed to investigate the field characteristics of railway infrastructure and improve the conventional field safety management methods by identifying the most appropriate features of AR technology. Group interviews and surveys were conducted with field safety experts to derive the major problems and inspection needs. Subsequently, various features of AR, such as BIM model projection, and remote conferencing, were investigated to determine their applicability to address safety issues. As a result, four problems in the current safety management process, such as 'lack of time due to the conventional inspection method and inspection of areas that are difficult to access', and three major inspection types, such as 'observance of work procedures, status of installation, adequate dimensional spacing', were identified to be improved when adopting AR based techniques. Furthermore, AR technology utilizing plans to solve safety inspection problems and effectively manage major inspection types were proposed, and a follow up survey was conducted with the same field safety experts to derive the priority of technology development.

• Journal of the Korean Society for Railway
• /
• v.15 no.4
• /
• pp.381-387
• /
• 2012

This paper is aimed to analyze the achievements of the Tunnel Monitoring System(TMS), implemented in Seoul subway L5~L8, and to find out improved methods. By introducing the TMS, it is possible to inspect tunnel facilities for 24 hours a day while trains are operated. The inspection capability could be expanded, the accuracy was improved, and the cycle was shortened. The efficiency of manpower was improved and the surplus manpower could be used for other tasks of facilities maintenance. As a result, by introduction of the TMS, the amount of tunnel maintenance was increased by 225% and the train service troubles caused by facility problems were decreased by 53%.

• 프린팅코리아
• /
• s.51
• /
• pp.62-71
• /
• 2006

KBA, 하이델베르그, 만로랜드, 고모리, 미쓰비시 등 유수의 인쇄기 제조회사들이 전용 모뎀이나 인터넷 등의 네트워크를 통한 원격진단(Romote diagnostics) 서비스를 운영하고 있다. 이 서비스는 각 제조사가 보유하고 있는 네트워크를 통해 담당 기술자와 인쇄기 오퍼레이터가 온라인으로 연결, 서비스맨의 방문 없이도 인쇄기 A/S를 구현할 수 있도록 하는 시스템이다. 최근 들어 이 시스템은 발생한 문제를 해결하는 것에 그치지 않고 인쇄기의 상태를 점검함으로써 고장을 사전에 예방을 하는 방법으로 진화하고 있다. 이 시스템이 미국에서 어떻게 활용되고 있는지를 살펴보고, 국내에 진출한 대표적인 업체들의 서비스 준비상황을 점검해 본다.

• Computational Structural Engineering
• /
• v.3 no.3
• /
• pp.58-61
• /
• 1990

교량유지관리 업무는 교량의 건설(신설), 노후교량의 개축, 교통량 증가에 따른 교량의 확장, 보수를 통한 원상복구, 또한 보수기록의 보관문제, 기존교량의 계속적인 점검 및 조사 등으로 분류된다. 이러한 문제를 전산화 하는 것은 필요항목들을 특성별로 분류하여 각 항목 등에 대한 데이타베이스를 구축하고 교량의 점검 및 조사 등을 통하여 교량의 손상상태를 파악함은 물론 개축, 보수, 확장, 신설 등에 대한 판정 및 그 우선순위를 제시하여 주는 의사결정시스템 개발이다. 본 고에서는 교량관리업무를 전산화하기 위해 한국건설기술연구원에서 개발한 교량관리용 DB(DATA BASE)시스템에 대하여 간략히 소개하고자 한다.

• Journal of Digital Convergence
• /
• v.11 no.8
• /
• pp.213-218
• /
• 2013

In this paper, when vehicle inspection is made, the check way is recommended based on the intelligent and personalized in the workplace, education, and other space-time according to the current situation. These results increase productivity, reduce costs, and improve performance. So we designed vehicle inspection recommendation system using ontology. Recommendation method is that components connected concept are shown according to weight value. if components are connected with other concept, the components are extended.

• 한국항공운항학회:학술대회논문집
• /
• 2016.05a
• /
• pp.117-124
• /
• 2016

현행 국내 항공안전감독 업무 및 시스템의 인허가 AOC(Air Operator Certificate) 관련 정보 확인 기능 부재, 연 월간 감독계획 간의 연계성 취약, 점검 데이터 활용 통계 및 분석 기반 취약, 점검 및 인허가 대상별 인허가 점검 관련 데이터 관리 기반 미흡, 제한적 시스템 기능 구현에 따른 상당 업무기능의 수작업 문서처리 등의 한계점을 파악하고 이를 개선하기 위한 대안으로 위험관리(Risk Management) 기법을 활용한 항공안전감독 업무절차 및 현행 운영 시스템의 개선모형을 도출하고 이를 적용한 운영체계의 구현 방향성을 제시하고자 한다.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 1994.04a
• /
• pp.491-499
• /
• 1994

중대형 컴퓨터생산 라인은 요구 사양의 다양성, 주문의 가변성, 잦은 주문의 변화, 자재의 긴 납기들로 특징지워진다. 이와 같은 생산체계에서의 생산일정계획은 첫째, 자재및 재공의 엄격한 가용성 점검기능, 둘째, 돌발적인 주문에 대비한 안전재공의 유지기능, 셋째, 자재 부족시 완성품의 수를 극대화 시킬수 있는 자재할당처리, 넷째, 자재수급계획의 변동을 흡수할 수 있는 생산 일정계획의 수정기능이 지원되어야 한다. 본 시스템은 이상의 요구조건들을 만족시키는 생산 일정계획 수립시스템으로 현장에서 사용되는 3000-4000가지에 이르는 자재의 보유상황을 엄격히 점검하여 주문된 제품에 대한 자재 사용계획을 수립하고 안전재공으로 관리되는 재공의 보유수량을 점검해서 일정 범위내에 보유수량이 유지되도록 자동으로 생산계획을 수립한다.