• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1995년도 춘계공동학술대회논문집; 전남대학교; 28-29 Apr. 1995
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• pp.79-90
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• 1995

The material handling equipment selection, that is a key task in the material handling system design, is a complex, difficult task, and requires a massive technical knowledge and systematic analysis. It is invaluable to justify the selected equipment model by the performance evaluation before its actual implementation. This paper presents an intelligent knowledge-based expert system called "IMESE" created by authors, for the selection and evaluation of material handling equipment model suitable for movement and storage of materials in a manufacturing facility. The IMESE is consisted of four modules: a knowledge base to select an appropriate equipment type, a multiple criteria decision making procedure to choose the most favorable commercial model of the selected equipment type, a database to store the list of commercial models of equipment types with their specifications, and simulators to evaluate the performance of the equipment model. The whole process of IMESE is executed under VP-Expert expert system environment.vironment.

• 산업경영시스템학회지
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• 제21권47호
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• pp.243-251
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• 1998

These days material handling accidents and injuries are some of the most common in the workplace. 20-45% of all occupational injuries is taken place in the area of material handling industry. The control and management of material handling activities can have a significant impact on the workforce safety and productivity in the manufacturing industry. This paper is to suggest effective countermeasures for reducing and protecting occupational accidents in the area of material handling industry. To do so, firstly, we found out the relationship between occpational accidents and business. Secondly, we are to analyse overall occupational accidents caused by material handling tools. Thirdly, we found out important factors of occupational accidents and injuries in the area of material handling industry by analysing 10 cases in detail, which have been occured from 1994 to 1997 in the workplace.

• 한국정밀공학회지
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• 제30권9호
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• pp.915-921
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• 2013

Most of large scale solar panel handling robots adopt the timing-belt drive system for its driveline because of the simplicity and the easiness of implementation. The vibration caused by the flexure of the timing belt would increase as the size and the weight of the panel that the robot handles increase and the vibration would deteriorate the precision and/or productivity of the whole robot system. For the development of a proper control system and for the improvement of the design of the robot it is important to estimate the oscillatory response of the robot system including the flexible drive system properly. In this paper a flexible multi-body dynamics model of a large-scale solar-panel-handling robot with the flexible timing-belt drive system is developed using a generic multi-body dynamics analysis program, RecurDyn.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.583-590
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• 2008

최근 작업자 숙소 및 이송용 외에 작업용으로 사용 가능한 Barge선의 일종인 Accommodation Work Barge 선의 건조량이 증가 추세인 바 현재 중국에서 건조 중인 해당 선박의 HVAC & Refrigeration system에 대하여 정리하였다. 본 시스템은 R404A Direct expansion 냉각방식 (직접팽창방식)이 적용되었으며 HVAC system 중 Air conditioning 부분에 대해서는 선박의 각 Deck 기준으로 Zoning 하여 개별적인 Air handling unit와 Condensing unit를 구성하였으며 (각 unit의 용량은 필요용량의 100%), 냉동 창고의 Refrigeration system은 해당 격실 (육고, 어고, 야채고)에 각각 Unit cooler를 설치하고, Condensing unit를 기계실에 설치하였다. 장비는 전체 용량 100%에 대하여 항시 운전하는 100% 용량의 장비와 비상시에 운전하는 100% 용량의 예비 장비로 구성된다. 냉동 창고에 인접한 Dry provision store는 냉동 창고와는 별개로 중앙 공조기로부터의 냉각 공기를 이용하여 Spot cooling하였다. 본 System의 구성에 대한 장점 및 단점은 아래와 같다. 1. Air conditioning system이 각 Zone에 대하여 구성되므로 각 Zone에 대하여 제어가 가능하다. 2. Air con. 실에 Air handling unit와 Condensing unit가 설치되므로 냉매 배관의 길이가 짧다. 3. Air con. 실에 Air handling unit와 Condensing unit가 설치되므로 실내의 Maintenance space 상에 여유가 없다.

• 한국항해항만학회지
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• 제35권3호
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• pp.187-195
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• 2011

선박운항자의 인적사고 방지 및 운항 훈련을 위한 방안으로 선박 운항 시뮬레이터가 사용된다. 선박운항 시뮬레이터에서 실시간 3D 가시화 기술은 현실감 있는 직관적인 영상을 제공하여 피교육자에 인지력을 향상시켜 시뮬레이터의 교육 효과를 높이는 중요한 요소이다. 본 연구에서는 공개형 3D 그래픽 엔진을 기반으로 선박 운항 시뮬레이터용 실시간 3D 가시화 시스템을 설계하고 구현한 결과에 대해서 설명한다. 실시간 3D 가시화 시스템은 요소 기능, 기존 그래픽 데이터 활용, 타 시스템과의 연동 측면에서 도출된 운용 요구사항들을 만족하며 추가적인 기능의 확장이 용이한 구조로 설계되었다.

• 한국산업융합학회 논문집
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• 제22권6호
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• pp.785-795
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• 2019

This paper is a study on the modeling of the quantity estimation model for offshore plant Material handling equipment in FEED(Front End Engineering Design) verification stage using system engineering approach which is an engineering design methods. The relevant engineering execution procedure is not systemized although the operation method and Material handling equipment selection with weight and space constraints is a key part of the FEED. Using the system engineering process, the stakeholder requirements analysis process, the system requirements analysis, and the final system architecture design were sequentially performed, and the process developed through the functional development diagram and Requirement traceability matrix (RTM) was verified. In addition, based on the established process, we propose a Material handling quantity estimation model and Quantity calculation verification Table that can be applied at the FEED verification stage and we verify the applicability through case studies.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1995년도 추계학술대회 논문집
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• pp.1186-1190
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• 1995

This paper is focused on the formulation of explicit closed-form functions describing the performance measures of the general flexible manufacturing system (FMS)according to the strategy of material handling system(MHS). the performance measures such as the production rate, the production lead-time and the utilization rate of the general FMS are expressed, respectively, as the explicit closed-form functions of the part processing time, the service rate of the material handling system (MHS) and the number of machine tools in the FMS. For this, the gensral FMS is presented as a generalized stochastic Petri net model, then, the moment generating function (MGF) based approach is applied to obtain the steady-state probabity formulation. Based on the steady-state formulation, the explicit closed-form functions for performance measures of the probability FMS can be obtained. Finally, the analytical results are compared with the Petri net simulation results to verify the validity of the suggested method. The paper is of significance in the sense that it provides a comprehensive formula for performance measures of the FMS even to the industry engineers and academic reademic resuarchers who have no background on Markov chain analysis method or Petrinet modeling

• 한국정보통신학회논문지
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• 제15권1호
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• pp.241-248
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• 2011

본 논문에서는 핵연료 교환기 헤드를 제어하는 진단시스템을 설계하고 구현하였다. 제안하는 핵연료 교환기 진단시스템은 신호 수집 시스템, 진단 알고리즘, 고장 시뮬레이터의 세 부분으로 구성된다. 핵연료 교환기를 직접 사용하는 실험은 원전 운영상 불가능하여 본 연구에서는 고장 시뮬레이터로 베어링 이상 상태를 생성시키고 FFT 및 웨이블릿 변환을 이용하여 고장 진단 실험을 수행하였다. 베어링 볼 이상 상태 진동 분석과 베어링 내륜 이상 상태 진동 분석을 통해 이론값과 실험값이 거의 일치함을 확인하였다.

• 대한안전경영과학회지
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• 제8권3호
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• pp.27-36
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• 2006

The port, differently from general working place, is a closed area to execute security, customs, and quarantine procedures. The loading and unloading is being done differently by cargoes, ships, berths, and equipments. To load and unload a lot of equipments and different types of labor are required, in which work flow is very complicated. As above mentioned the port is very unique and deteriorated working place including danger. The purpose of this thesis is to propose ways to analyze and establish the preventive measure for cargo handling accidents in port. We have collected 923 accidents happened at Incheon Port during the period from 1994 to 2003. And to analyze and establish the preventive measure we have employed an advanced 6sigma DMAIC technology presently in spotlight as the best tool for management innovation. For the purpose of effective safety management of cargo handling in port, this thesis will help to revise and establish the law, system, standard, and standard working manual with respect to the port loading and unloading system. Now frequency of cargo handling accidents in port is highest for the second time among all industries, so we proposed the new safety management system to substitute port safety committee and to take full charge of safety in Ministry of Maritime Affairs and Fisheries.

• 한국산학기술학회논문지
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• 제12권4호
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• pp.1947-1953
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• 2011

OSEK/VDX는 자동차 ECU를 위한 산업계 표준을 제시하고자 구성된 공동 프로젝트이며 OSEK OS는 OSEK/VDX에서 제안한 사양을 준수하는 실시간 운영체제이다. 본 논문에서는 ARM 프로세서를 기반으로 한 OSEK OS의 태스크 전환 및 인터럽트 핸들링 메커니즘 구현을 제시한다. OSEK OS의 요구사항과 ARM 프로세서의 특성을 고려하여 태스크 전환 및 인터럽트 핸들링 메커니즘을 설계하였다. 제시한 메커니즘의 타당성을 검토하기 위하여 ARM 프로세서가 탑재된 실험용 임베디드 보드에서 기능적 정확성을 확인하고 태스크 전환과 인터럽트 핸들링에 소요되는 시간을 측정하였다.