• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2004년도 Proceedings of the 4th Korea-China Joint Workshop on Nuclear Waste Management
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• pp.205-219
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• 2004

The remote operation of the Advanced Spent Fuel Conditioning Process (ACP) is analyzed by using the 3D graphic simulation tools. The ACP equipment operates in intense radiation fields as well as in a high temperature. Thus, the equipment should be designed in consideration of the remote handling and maintenance. As well as suitable remote handling and maintenance technology needs to be developed along with the design of the process concepts. To develop such remote operation technology, we developed the graphic simulator which provides the capability of verifying the remote operability of the ACP without fabrication of the process equipment. In other words, by applying virtual reality to the remote maintenance operation, a remote operation task can be simulated in the graphic simulator, not in the real environment. The graphic simulator will substantially reduce the cost of the development of the remote handling and maintenance procedure as well as the process equipment, while at the same time developing a remote maintenance concept that is more reliable, easier to implement, and easier to understand.

• Journal of Construction Engineering and Project Management
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• 제2권4호
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• pp.11-19
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• 2012

Construction supply chain management (CSCM) has become one of the critical factors that determine the success of a construction project as it becomes increasingly complicated and mega-sized. Particularly for high-rise or mega-sized building construction, just-in-time supply chain management is required due to lack of storage space and effective logistics for construction components and materials at a construction site. Despite the fact that research and development of radio frequency identification (RFID) and wireless sensor network (WSN) technology have been performed, construction project managers still need to carry mobile devices and check material and component flow at each stage of the supply chain process. This research proposes that the equipment used in the construction supply chain process, such as movers, trailers, gates, and hoists, can become main actors in the supply chain process using RFID and WSN technologies. And the proposed equipment and process focused on a solution to the redundancy identification problem, which has been observed in operations that use RFID/WSN-based processes for construction logistics. This paper also presents issues identified through verification and validation of the research results and proposes further studies.

• 한국지진공학회논문집
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• 제25권6호
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• pp.241-249
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• 2021

Communication facilities play an essential role in disaster situations. Therefore, communication facilities need to have structural and functional safety during and after earthquakes. Recently, technology for partial seismic isolation has been increasing to protect data facilities and communication equipment installed in buildings from earthquakes. However, excessive displacement may occur in the seismic isolator during an earthquake due to the resonance between the building and the seismic isolator having long-period characteristics, which may cause overturning and separation of the installed equipment. In this study, analytical and experimental studies were conducted to evaluate the safety of seismic isolators installed in high-rise buildings. It was confirmed that damages might occur in buildings' seismic isolator, with resonance characteristics of less than 1 Hz.

• 한국산학기술학회논문지
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• 제18권10호
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• pp.153-162
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• 2017

무기체계는 기술의 발달로 인하여 급속도로 발전하고 있다. 이러한 발전덕분에 과거 무기체계에서 보지 못했던 고가의 첨단 전자장비들이 포함된 무기체계가 등장하게 되었다. 더불어, 고도의 기술이 적용된 무기체계의 운영 및 유지보수를 위한 장비유지예산 또한 증가되고 있다. 그러나 장비유지예산은 장비자산대비 그 비율이 감소추세에 있어, 효율적인 무기체계 운영에 어려움이 초래되고 있다. 이처럼 고비용 환경이 되고 있는 국방경영 및 감소되고 있는 장비유지예산을 고려하는 연구가 필요하다. 본 연구는 무기체계를 운영 및 유지보수 하는데 필요한 정비장비에 초점을 두고 있다. 최신 무기체계는 계측장비와 같은 정비장비를 활용하여 무기체계의 정렬 및 검교정 절차를 수행 후, 적정한 무기 성능이 유효하다고 볼 수 있다. 이러한 계측장비는 주기적으로 업체 외주정비(검교정 절차)를 하여 계측장비 자체의 정렬 및 상태 이상 유무를 확인해야 한다. 일반적으로 계측장비는 신뢰성이 입증된 해외업체의 계측장비를 구매하게 되고, 이러한 계측장비는 주기적으로 해외 외주정비를 받을 수밖에 없게 된다. 즉, 정비장비가 해외 외주정비를 진행하는 동안, 해당 무기체계는 성능에 대해 신뢰할 수 없으며 불가용 상태라고 볼 수 있다. 본 연구의 목적은 정비장비의 해외 외주정비로 인해 발생하는 무기체계의 손실비용과 정비장비의 구매 비용을 비교하여, 적절한 정비장비의 구매 대수를 제시하고자 한다. 본 연구의 결과가 효율적 작전 수행 보장에 기여할 것으로 판단되며, 전력 공백 문제를 해결 가능한 방안이 될 것이다.

• 전기학회논문지P
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• 제67권3호
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• pp.168-174
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• 2018

The performance test for 376MW ESS for frequency regulation currently operating in 13 substations is conducted based on the test procedure in the first and second steps. In the first step, components of ESS is moved to the certification authority where the test equipment is located in order to be proceeded with the test. In the second step, the performance test is conducted manually for the ESS equipments installed on site using the movable measurement equipment, and thus it can only be performed on some limited test items and requires a lot of time and manpower. Therefore, mobile test equipment for ESS(MOTES) is being developed that can perform automatically more test items for ESS in the field using the MOTES, and reduce manpower and time. To do this, an algorithm and a prototype of the operating system(MOS) are also being developed that can control MOTES automatically. In this paper, a development of the MOS prototype is introduced and then a simulation is performed to verify the prototype and its algorithm before the field demonstration.

• 대한기계학회논문집A
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• 제35권2호
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• pp.149-156
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• 2011

다양한 생산 설비에 따른 설비정보를 MES 등의 생산시스템에 효율적으로 제공하기 위해 설비 정보 수집 시스템은 생산현장의 설비 및 공정특성을 고려한 다양한 설비 인터페이스에 따른 정보 수집이 필요하다. 본 연구에서는 생산현장의 다양한 생산 설비의 정보를 수집하기 위해 설비 인터페이스를 통한 설비정보 수집 방법을 제안한다. PLC 기반의 인터페이스, Sensor 기반의 I/O 인터페이스, 작업자 Key-In 에 의한 인터페이스 등 다양한 설비 인터페이스를 통해 생산 현장의 정보를 1 차 수집할 수 있다. 데이터 수집 시스템은 H/W Communication Module 과 Operator Key-In Module을 이용하여 설비 인터페이스를 통해 수집되는 설비 정보를 2 차 가공하며, 데이터 파서(Data Parser)를 통해 수집 정보의 유연성을 높일 수 있다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2021년도 추계학술대회
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• pp.72-73
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• 2021

자율운항선박(MASS, Maritime Autonomous Surface Ship) 도입을 위한 국제해사기구의 논의가 본격화됨에 따라 국제항로표지협회 제27차 이네비게이션(ENAV) 위원회 워킹그룹(WG2)에서 MASS 운영지원을 위한 시스템 개발시 사이버보안(사이버 위험관리) 측면을 우선적으로 고려하도록 하는 논의가 진행되었다. 우리나라는 2020년 자율운항선박 기술개발사업을 착수하였으며, 2021년부터 사이버보안 기술개발을 위한 세부과제를 추진 중에 있다. 디지털 해상통신시스템 환경에서의 MASS 운용은 기존 해상통신환경에서는 고려되지 않았던 다양한 디지털 장비들의 네트워크 보안이 요구된다. 본 연구에서는 사이버보안 기술개발 세부과제에서 수행중인 MASS 운용 지원을 위한 네트워크 보안장비 기본 개념을 소개하고, 기초단계에서의 MASS 선박 적용을 위한 네트워크 보안장비 인터페이스를 정의한다.

• 한국CDE학회논문집
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• 제18권2호
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• pp.138-147
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• 2013

The liquefaction process system is regarded as primary among all topside systems in LNG FPSO. This liquefaction process system is composed of many types of equipment. LNG equipment on offshore plants has quite different demands on the equipment compared to traditional onshore LNG plants, so the reliability analysis of this process system needs to be performed. This study investigates how DEVS formalism for discrete event simulation can be used to reliability analysis of the liquefaction cycle for LNG FPSO. The reliability analysis method based on DEVS formalism could be better model for reflecting the system configuration than the conventional reliability analysis methods, such as fault tree analysis and event tree analysis.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2012년도 추계 학술논문 발표대회
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• pp.243-244
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• 2012

Recently, research has been actively conducted for getting interested in unit module housing. However, the domestic unit modular housing research in the early stages yet, so the major process for research is lacking. Explore all these reasons fit with domestic unit housing development this paper, focusing on the process of shipping cargo by truck, transport unit module was studied. The purpose of this paper is to present new ideas and derive the direction of the development of the equipment safely and effectively fixed to the unit module of the transport unit module that will be helpful in the development of the equipment required for the transport process of the next unit module.

• 한국소음진동공학회논문집
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• 제24권2호
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• pp.102-107
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• 2014

The engine excitation forces are considered as major vibration source for the forklift truck, especially in small class. Even though the current engine mounting system designs are acceptable for vibration isolation, the performance of the engine mounting system is still required for the tendency of light weight, higher power and driver's higher vibration requirement. In this paper vibration reduction technique of forklift engine which is supported on rubber mounts is presented. Based on the dynamic model of resilient engine mounting system, design evaluation program is established. The design optimization technique and evaluation method of system properties are discussed. Effects of optimal design are validated through comparison with test results.