• 한국시뮬레이션학회논문지
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• 제12권3호
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• pp.21-29
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• 2003

The operation rules to remarshaling works in yard is very important in automated container terminal (ACT). However, the decision rules for conventional container terminals have some restrictions to be applied to ACT whose block layout Is vortical for berth. The objective of this study is to propose the efficient operations rules for remarshaling works of automated transfer crane (ATC) in ACTs. Then, the various operation rules are simulated to verify the proposed operation rules. The results of the simulation study on various rules are provided and discussed.

• 제어로봇시스템학회논문지
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• 제12권8호
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• pp.834-841
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• 2006

Recently, many enterprises are installing AMSs(Automated Manufacturing Systems) for their competitive advantages. As the level of automation increases, proper design and validation of control logic is a imperative task for the successful operation of AMSs. However, current discrete event simulation methods mainly focus on the performance evaluation. As a result, they lack the modeling capabilities for the detail logic of automated manufacturing system controller. Proposed in this paper is a method of validation of the controller logic for automated material handling system using an object-oriented design and simulation. Using this method, FA engineers can validate the controller logic easily in earlier stage of system design, so they can reduce the time for correcting the logic errors and enhance the productivity of control program development Generated simulation model can also be used as a communication tool among FA engineers who have different experiences and disciplines.

• 자동차안전학회지
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• 제13권4호
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• pp.114-122
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• 2021

In this paper, an automated vehicle intersection collision accident was analyzed through simulation. Recently, the more automated vehicles are distributed, the more accidents related to automated vehicles occur. Accidents may show different trends depending on the sensor characteristics of the automated vehicle and the performance of the accident prevention system. Based on NASS-CDS (National Automotive Sampling System-Crashworthiness Data System) and TAAS (Traffic Accident Analysis System), four scenarios are derived and simulations are performed. Automated vehicles are applied with a virtual system consisting of an autonomous emergency braking system and algorithms that predict the route and avoid collisions. The simulations are conducted by changing the sensor angle, vehicle speed, the range of the sensor and vehicle speed range. A range of variables considered vehicle collision were derived from the simulation.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 춘계학술대회 논문집
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• pp.74-81
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• 2005

In this study, we introduce a 3D simulation model to support the design on ACT(Automated Container Terminal) using 3D animation. The developed simulation model simulate virtual operations of ACT and animate the simulated results with real time. We provide several validation points for the design of ACT. And the developed system applied an object-oriented design and C++ programming to increase the reusability and extensibility. We can perform the various simulation experiment and analyze performances to estimate the required number of equipment using developed simulation model.

• 자동차안전학회지
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• 제8권4호
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• pp.31-37
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• 2016

Since real road experiments have many restrictions, a multi-vehicle traffic simulator can be an effective tool to develop and evaluate fully automated driving systems. This paper presents multi-vehicle environment simulation tool to develop and evaluate motorway automated driving systems. The proposed simulation tool consists of following two main parts: surrounding vehicle model and environment sensor model. The surrounding vehicle model is designed to quickly generate rational complex traffic situations of motorway. The environment sensor model depicts uncertainty of environment sensor. As a result, various traffic situations with uncertainty of environment sensor can be proposed by the multi-vehicle environment simulation tool. An application to automated driving system has been conducted. A lane changing algorithm is evaluated by performance indexes from the multi-vehicle environment simulation tool.

• 한국시뮬레이션학회논문지
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• 제13권1호
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• pp.25-39
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• 2004

Simulation has been recognized as one of major application areas of world wide web. Over the last several years, most research has been focused on the development of web-based simulation languages mostly using JAVA and validation of simulation modeling on web with the newly developed languages. In this paper, we develop a tentative web-based simulator for a simple unit-load automated warehouse system, named Web-SAW. In constructing Web-SAW, we program a user interface program, a simulation logic program, and an animation program with JAVA while utilizing the class library functions and embodiment environment of existing web-based simulation languages. Web-SAW simulates the automated warehouse system with the user input about system operation, displays the animation on a static background representing the system, and generates the various textual outputs after simulation.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 1999년도 춘계학술대회 논문집
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• pp.212-216
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• 1999

We propose a method for simulation optimization using stochastic genetic algorithm(GA) to get the best design and operating policies in a Direct-Input-Output Automated Manufacturing System (DIOMS).

• 한국시뮬레이션학회논문지
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• 제15권3호
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• pp.103-114
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• 2006

최근의 자동물류센터는 자동창고(ASRS)와 자동주행대차(AGV)를 중심으로 각종 컨베이어시스템과 운반장치 등으로 구성되면서 매우 복잡한 시스템 형태를 갖게 되었다. 이러한 시스템의 복잡성에 기인하여 시스템 설계과정에서의 정확한 운영 수행도 파악을 위해서는 많은 종류의 설계변수들이 고려되어야 한다. 물류센터 설계에서 고려해야할 일반적인 설계 변수로는 보관설비 및 운반설비의 사양과 여러 가지 시스템 운영 규칙, 보관영역이나 보관물의 형태 등이 있다. 이 논문에서는 자동화물류센터에 대하여 시뮬레이션 실험과 반응표면모델을 이용하여 메타모델을 만들고 이를 통하여 설계변수들을 최적화하는 효율적인 방법에 대하여 소개 하고자 한다. 정확하게 정의된 시뮬레이션 기반의 메타모델은 시스템 함수의 근사적 표현으로서 수리적 계산을 통해 신속한 설계변수 최적화를 가능하게 한다. 이 논문에서 제시한 접근 방법은 자동물류센터와 같은 복잡한 물류 시스템의 설계 단계에서 시뮬레이션의 설계 참여도를 극대화시키고 최종 설계의 정확도를 향상시키는데 기여 할 것이다.

• 한국시뮬레이션학회논문지
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• 제14권3호
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• pp.109-118
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• 2005

The purpose of this paper is to analyze transport ability of AGV(Automated Guided Vehicle) and SHC(SHuttle Carrier). The main difference between two types of transport vehicles is that AGV depends on container crane or transfer crane to do loading/unloading container, but SHC is very independent to it. Therefore, the transport ability of SHC is expected to be higher than AGV. So, in this paper, we established simulation model to evaluate two types of transport vehicles and analyzed the results. Simulation model was established to automated container terminal with perpendicular yard layout, and applied closed loop operation of transport vehicle between apron and stacking yard. In the result, SHC showed very superior than AGV aspect of container crane productivity and vehicle fleets.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2005년도 춘계학술대회 논문집
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• pp.57-63
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• 2005

The purpose of this paper is to analyze transport ability of AGV(Automated Guided Vehicle) and SHC(SHuttle Carrier). The main difference between two types of transport vehicles is that AGV depends on container crane or transfer crane to do loading/unloading container, but SHC is very independent to it. Therefore, the transport ability of SHC is expected to be higher than AGV, So, in this paper, we established simulation model to evaluate two types of transport vehicles and analyzed the results. Simulation model was established to automated container terminal with perpendicular yard layout, and applied closed loop operation of transport vehicle between apron and stacking yard. In the result, SHC showed very superior than AGV aspect of container crane productivity and vehicle fleets,