• 산업경영시스템학회지
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• 제16권28호
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• pp.203-209
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• 1993

In Factory Automation environments such as FMS, the formation of machine-part based on GT should be considered. The purpose of this study is to develop a economic heuristic algorithm which considers various elements such as unit processing time, subcontract cost, and functional operation cost, machine processing capacity etc. When this proposed approach is applied to the real situation expected benefits are as follows: the reduction of production lead time work in process, labor force, tooling, rework and scrap, setup time, order time delivery, and paper work, etc.

• 시스템엔지니어링학술지
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• 제11권1호
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• pp.55-65
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• 2015

In steel making plant, sampling system for raw material such as iron ore, limestone is necessary for quality control purpose. For the sake of efficiency and productivity, automation of the sampling system is highly desirable. From technical standpoint, the development of the automated system requires multi-disciplinary domain knowledge such as mechanical engineering, industrial engineering, information technology and computer engineering. Up to present time, the development has been mainly carried out by a single domain expert with project manager. The automated system developed in this way caused problems in the final system. This paper suggests a systems engineering approach to the development of automation for raw material sampling plant via a tailored process called Plant Systems Engineering (PSE) Process based on ISO/IEC 15288. Through the PSE process, we could derive right requirements and architecture of the Systems Of Interest (SOI), and we were convinced that the PSE Process can be applied to many other Plant Systems.

• 한국산학기술학회논문지
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• 제17권6호
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• pp.61-69
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• 2016

2000년 이후 1인가구수의 폭발적인 증가로 국내 편의점 시장 또한 급속히 성장하고 있지만, 아직 국내물류산업의 여건상 수작업 중심으로 이루어져 있어서 시장의 폭발적인 수요증대를 대부분 작업자들에게 의존하고 있다. 이로 인해 전자, 자동차 등 제조업에서 많이 수행되고 있는 자동화를 통한 효율성 증대와 관련된 연구는 미흡한 실정이다. 본 연구에서는 국내 유명 편의점 기업인 A사의 유통물류센터를 대상으로 자동화 설비의 도입을 위한 투자 타당성 분석을 수행하였다. 시간과 인력이 가장 많이 소요되는 피킹 프로세스를 대상으로 시뮬레이션을 이용하여 무인운반차 장비 도입에 따른 생산성 증가 및 비용절감 효과를 분석하였다. 시뮬레이션 결과로 피킹 프로세스에 도입한 AGV 장비는 현재 수작업 대비 시간당 효율성을 증가시키고, 비용을 절감하는 효과도 존재하였다. 아울러, 꾸준히 성장하고 있는 A사 편의점 유통물류센터의 처리물량을 감안하여 적정 AGV 대수를 예측하였다. 물류산업 종사자들의 인건비가 빠르게 증가하는 요즘, 대규모 신규 자동화 센터 구축에 앞서 단위 프로세스 별 부분 자동화를 통한 생산성 증대와 비용감소에 고민하는 투자 의사결정권자들에게 좋은 정보를 줄 수 있을 것으로 기대된다.

• Transactions on Control, Automation and Systems Engineering
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• 제3권1호
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• pp.10-14
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• 2001

We studied the use of time-related information, with and without prediction, to support human operators performing moni-toring and control tasks in the process. Based on monitoring and control techniques used for Project Management we developed a display design for the process industries. A simulated power plant was used to test the hypothesis that availability of predictions along with information on past trends can improve the performances of the human operator handling faults. Several designs of dis-plays were tested in the experiment in which human operators had to detect and handle two types of faults(local and systems wide) in the simulated electricity generation process. Analysis of the results revealed that temporal data, with and without prediction, signifi-cantly reduced response time. Our results encourage the integration of temporal information and prediction in displays used for the control processes to enhance the capabilities of the human operators. Based on the analysis we proposed some guidelines for the de-signer of the human interface of a process control system.

• 한국신뢰성학회지:신뢰성응용연구
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• 제10권1호
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• pp.39-56
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• 2010

Statistical process control (SPC) is a powerful technique for monitoring, managing, analysing and improving the process performance. However, its has limitations such as lack of engineering, statistical skill and training, and lesser importance of activity. To solve the problems, this study proposes an intelligent SPC system using specified agents which are derived through analysis and evaluation of the SPC activities. The activities investigated by the relevant researches are categorized as collection, process analysis, diagnosis, detection, cause analysis and rule generation. Also, the evaluation criteria are established as feasibility of automation, frequency, level and time. The requirements of the agent functions are derived by the evaluation, and the types of customized agents are as data collection, store, analysis, diagnosis, monitoring, alarm and reporting. A prototype SPC system represents that the functions of the proposed agents are successfully validated.

• 한국산학기술학회논문지
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• 제13권1호
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• pp.1-7
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• 2012

선박설계에 있어서 설계효율 향상 및 설계품질 확보를 위해서는 설계 자동화 시스템의 구축이 필수적이다. 이를 위해서는 조선전용 3차원 CAD 시스템의 개발과 함께 여러 설계 공정에서 발생되는 설계정보를 충돌 없이 자연스럽게 반영해 줄 수 있는 설계 정보 관리 소프트웨어들이 개발되어야 한다. 설계 정보 관리가 요구되는 대표적인 예로서 선체 의장품 시공에 필요한 의장 홀의 설계 과정을 들 수 있다. 설계 기간 중 빈번하게 발생하는 의장 부서로부터의 홀 시공 요구에 대하여 구조 설계 부서는 구조 안정성과 적합성을 고려하여 검토하고 반영 여부를 의장 부서로 통보하게 되며, 결정 시까지 부서간의 업무 협의, 토론, 관련 도면 작성 등 많은 설계자원이 투입된다. 본 논문에서는 이러한 의장 홀 설계 과정을 자동화하기 위한 홀 플랜 시스템의 기본 개념 소개와 함께 프로세스 자동화 방안을 제시한다.

• 한국경영과학회:학술대회논문집
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• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
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• pp.106-111
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• 2005

In nuclear power plant, the source of the energy is generated from the nuclear fuel rod. Given a certain level of consumption, the burnt fuel rod should be removed and replaced by a new(fresh) one. The burnt fuel is approximately one third of the whole fuel rods. Currently, this operation is done manually using paper documents and verbal communication and consumes a lot of operation time. In this study, we develop an computerized operation process of nuclear fuel rod replacement procedure based on the ERP(Enterprise Resource planning) methodology.

• 한국산업보건학회지
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• 제28권1호
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• pp.100-107
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• 2018

Objectives: This study examines exposure to hazardous substances in the working environment caused by exposure to toxic substances produced in the aluminum die casting process in the automobile manufacturing industry. Materials and Methods: The exposure concentration levels, detection rates and time-trend of 15 hazardous factors in the aluminum die casting process over 10 years(from 2006 to 2016) were used as a database. Results: The study found that hazardous factors in the aluminum die casting process were mostly metals. The rate for detected samples was 70.6%(405 samples), and that for not detected samples was 29.4%. The noise for an eight-hour work shift showed a 49.7% exceedance rate for TLV-TWA. Average noise exposure was 89.0 dB. The maximum exposure level was 105.1 dB. Conclusion: The high numbers of no-detection rates for hazardous substance exposure shows that there is no need to do a work environment measurement. Therefore, alternatives are necessary for improving the efficiency and reliability of the work environment measurement. Moreover, to prevent noise damage, reducing noise sources from automation, shielding, or sound absorbents are necessary.

• 대한산업공학회지
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• 제26권4호
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• pp.376-383
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• 2000

A flexible disk grinding process model has been implemented with varying disk orientation with respect to workpiece surface along with variable feed rate. Before implementing arbitrary disk orientation and translation, disk angle and feed rate variation have been implemented. The disk angle was changed with constant angular velocity only in the entrance stage. The effect of the variable feed rate was added to the geometric schematic. The feed rate was changed either from the entrance stage or from the between edges stage and process performance was evaluated. Effect of changing both angle end feed rate has been also analyzed. Disk trend showing actual disk deflection has also been visualized.

• 한국산업정보학회논문지
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• 제5권3호
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• pp.51-55
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• 2000

본 연구는 전자라이터용 에폭시 정량공급장치의 개발에 관한 것으로써 기존의 수작업에 의한 생산을 자동화함으로 하여 품질의 균일화를 도모하고 또한 납기준수를 위한 생산성 향상에 기반을 둔 개발로서 전자라이터의 핵심 부품이라고 할 수 있는 Piezo ignitor절연부에 에폭시를 정량으로 주입할 수 있게 함으로서 품질 및 생산목표를 달성하고 기업의 이윤을 극대화하는데 맞추었다.