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A Study on the Automatic Assembly/Disassembly Procedure for Generating Maintenance Guideline
허길환,이원,권기상,Heo, Gilhwan,Lee, Won,Kwon, Kisang The Korea Institute of Military Science and Techno 2015 한국군사과학기술학회지 Vol.18 No.5
The purpose of this research is to propose a maintenance support system for deciding assembly sequence of the product and appropriate tools that are used to assembly and disassembly of parts in the product when geometric properties of the product. The digital maintenance system (DMS) is developed to generate the maintenance guideline and the initial experiment is conducted especially for an underwater weapon system with cylindrical structure. DMS considers four factors to find the efficient assembly and disassembly procedure automatically: (1) assembly tree, (2) properties of each part, (3) distance from the center of the product, and (4) volume. Based on the factors, DMS simulate the movement of each tool virtually and the properties of tools are investigated to find an appropriate tool for using assembly and disassembly of each part in the product. The proposed approach integrates modeling, simulation, data configuration, and virtual reality to allow a development of preliminary maintenance guidance.
허길환(Gil-Hwan Heo),이승용(Seung-Yong Lee),이학표(Hak-Pyo Lee) 한국산학기술학회 2018 한국산학기술학회논문지 Vol.19 No.12
최근 무기 체계에 대한 성능 요구 사양이 강화됨에 따라 연구 개발 초기 단계에서부터 개발 기간 단축 및 비용 최소화와 함께 효율적인 연구 방안 모색이 요구되고 있다. 이의 일환으로 무기 체계 개발 단계에서 가상현실 기술을 활용하여 군수지원 분석과 설계 검증을 수행할 수 있다. 또한 실질적 협업 체계 구축의 일환으로 종합 군수지원(ILS, Integrated Logistics Support) 개발 분야에서는 군수 지원성 향상을 목적으로 한 가상현실 기술의 적용이 대두되고 있다. 이에 본 연구에서는 무기 체계 전 수명주기 동안 가상현실 기술을 적용한 ILS 개발 및 적용 방안을 제안하고자 한다. 또한 현재 개발 중인무기 체계에서 이를 수행하기 위해 개발한 가상현실 도구인 디지털 정비절차 검증장치(DMS, Digital Maintenance System)의 주요 기능 및 ILS 개발 단계별 적용 방안을 소개하고, DMS의 효율적인 ILS 적용을 위한 향후 발전 과제에 대해서도 제시하고자 한다. An efficient R&D Methodology with minimized development period and cost needs to be developed due to advanced performance requirements of weapon systems. This will require the performance of logistics support analysis and design verification in the development stages of weapon systems through VR technology. VR technology has been applied to the Integrated Logistics Support (ILS) process as a part of collaborative system. In this study, we propose a development and application plan of ILS based on VR technology during the total life cycle of weapon systems. Moreover Digital Maintenance System (DMS) is introduced as a VR tool with key functions. finally, applications and improvement topics of DMS are suggested for use in ILS development.
윤원영,허길환 한국경영과학회 1998 한국경영과학회 학술대회논문집 Vol.- No.1
Economic production lot-sizing models often do not assume machine breakdown. In this study we focus on the preventive maintenance and optimal economic production lot-sizing decisions with machine failures. The failure rate of the production facility is increasing (IFR), and the production rate and the demand rate are assumed to be constant. We consider the following maintenance policies: the production is continued to the predetermined level, S. If the machine breaks down during production, it is minimally repaired. The preventive maintenance is done after n-th lot production, and the condition of the machine is re-initialized. Due to the time required for the preventive maintenance, it may happen the stockout period. The demand during the period is assumed to be lost. The minimal repair, holding, setup and preventive maintenance costs are considered. The expected cost rate is used to obtain the optimal economic lot-size and the period of the maintenance. Numerical example is included.