• 정보처리학회논문지B
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• 제10B권4호
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• pp.403-410
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• 2003

자율운항제어 시스템은 선박운항에 있어 항해계획을 수립하고 현재의 선박운항 상태를 파악하여 선박을 제어하는 항해 전문가 시스템이다. 이러한 자율운항제어 시스템을 테스트하기 위해서는 실제 선박을 대상으로 성능을 테스트하여야하나, 선박은 고가의 운송수단이고, 자율운항제어 시스템을 장착하기 위한 하부장치 인터페이스를 설계 및 구현하기에는 많은 시간이 소요되므로 선박시뮬레이션 시스템을 이용하는 것이 타당하다. 선박시뮬레이션 시스템은 선박의 물리적 운항특성을 모방하는 선박운동시뮬레이션 시스템과 선박 운항 주변에 변화하는 장애물을 시뮬레이션하는 주변객체 시뮬레이션 시스템으로 구성된다. 본 연구에서는 선박 운동방정식을 이용하여 선박의 물리적 및 운항 특성을 모방한 선박운동시뮬레이션 시스템을 설계 개발하였다.

• 한국군사과학기술학회지
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• 제10권1호
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• pp.78-85
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• 2007

A gun is still one of the major weapons of a combat ship. To assess the ship's fire control capability which is influenced by tracking system, fire control algorithm, gun, the ship itself, target behavior, environment and engagement situation, simulation system for gun-oriented engagement for surface ship is needed. This paper proposes the process for designing and implementing a gun-oriented engagement simulation system using DEVS(Discrete Event Simulation Specification), which is a formalism based on the set theory. It consists of the following activities : 1) analyzing the characteristics of a gun-oriented engagement, 2) constructing the deterministic model of the combat ship of study with DEVS, 3) modeling properties of each entity showing as stochastic errors. With this process, the gun-oriented engagement simulation system is developed and applied for the combat system under development.

• 한국시뮬레이션학회논문지
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• 제10권2호
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• pp.33-46
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• 2001

Recently, the usage of containers in marine transportation is rapidly increasing. The problem of ship stability is important because of its direct influence to the loss of the human-life, ship, and merchandise. However, the assessment for ship stability during container loading/unloading in port is dependent on human experience only. On the other hand, the emerging information and communication technologies of shipbuilding industrial environments are rapidly changing. To respond to the situation, a new paradigm has been matured with new concepts such as the concrete method. Especially, all the efforts are shown to be concentrated to realize the concept of Simulation Based Design(SBD) based on three dimensional Computer Aided Design(CAD) model. In this paper, ship model-based simulation methodology for design and operation of ship is suggested, and for the verification of suggested methodology, the system for stability assessment of ship during container loading/unloading was developed using ENVISION, a general-purpose simulation system. The developed system consists of geometric modeling subsystem, basic calculation subsystem, and Computer Aided Engineering(CAE) subsystem. In addition, interface to CAE/CAD /simulation system such as SIKOB and ENVISION is provided.

• International Journal of Naval Architecture and Ocean Engineering
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• 제10권1호
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• pp.37-47
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• 2018

Dynamic simulation is critical for electrical ship studies as it obtains the necessary information to capture and characterize system performance over the range of system operations and dynamic events such as disturbances or contingencies. However, modeling and simulation of the interactive electrical and mechanical dynamics involves setting up and solving system equations in time-domain that is typically time consuming and computationally expensive. Accurate assessment of system dynamic behaviors of interest without excessive computational overhead has become a serious concern and challenge for practical application of electrical ship design, analysis, optimization and control. This paper aims to develop a systematic approach to classify the sophisticated dynamic phenomenon encountered in electrical ship modeling and simulation practices based on the design intention and the time scale of interest. Then a novel, comprehensive, coherent, and end-to-end mathematical modeling and simulation approach has been developed for the latest Medium Voltage Direct Current (MVDC) Shipboard Power System (SPS) with the objective to effectively and efficiently capture the system behavior for ship-wide system-level studies. The accuracy and computation efficiency of the proposed approach has been evaluated and validated within the time frame of interest in the cast studies. The significance and the potential application of the proposed modeling and simulation approach are also discussed.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2011년도 춘계학술대회
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• pp.166-169
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• 2011

소방선 훈련시스템은 실선을 모사하여 제작된 소방선 훈련 시뮬레이터이다. 훈련원은 교관의 제시에 따라 다양한 훈련 시나리오를 수행하며 상황 대처 능력과 운항 및 소방 기술을 습득할 수 있다. 이러한 과정에서 훈련원에 대한 객관적이고 적절한 평가는 필수적이므로 이를 위한 훈련원 평가시스템을 개발하였다.

• International Journal of Ocean System Engineering
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• 제2권3호
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• pp.170-175
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• 2012

Currently, most logistics use containers. The construction of new port and high speed medium size container ship for the transportation of merchandise have become very important. The problem of ship stability is also important because of its direct influence on the loss of human life, ships, and merchandise. The stability of a container ship during its operation is not a large problem because it is well considered in the design process. However, the assessment of ship stability during container loading/unloading in port still depends on the expertise of experienced personnel. In this paper, a model based simulation system is introduced, which is able to assess ship stability during container loading/unloading, using ENVISION, a general purpose simulation system.

• 산업경영시스템학회지
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• 제35권1호
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• pp.101-106
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• 2012

Ship handling simulator is a virtual ship navigating system with three dimensional screen system and simulation programs. FTS simulation can produce theoretically infinite experiment tests without time constraint, but which results in collecting determinstic observations. RTS simulation can collect statistical observations but has disadvantage of spending at least 30 minutes for a single experiment. The previous studies suggested that the number of experiment conditions to be tested could be reduced to obtain random data with RTS simulation by focusing on highly difficult experiment condition for ship handling. It has the limitation of not estimating the distribution of ship handling difficulty for the route. In this paper, similarity and clustering analysis are suggested for reduction methodology of experiment conditions. Similarity of experiment conditions are measured as follows: euclidean distance of ship handling difficulty index and correlation matrix of distance differences from the designed route. Clustering analysis and multi-dimensional scaling are applied to classify experiment conditions with measured similarity into reducing the number of RTS simulation conditions. An empirical result on Dangin harbor is shown and discussed.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2004년도 춘계학술대회 논문집
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• pp.123-127
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• 2004

선박의 접안 시 현재 중ㆍ대형 선박은 체계화된 접안 시스템 없이 주선박의 선수와 선미 및 예인선에서 무전기를 이용한 통신에 의존하여 선박을 접안하고 있다. 본 논문에서는 이를 보완하고자 DGPS를 이용한 선반접안 시뮬레이tus 시스템을 설계하고자 한다. 주선박의 서버는 경ㆍ위도 좌표 값, 헤딩, 속도 등의 정보를 이용하여 선박과 부두와의 거리, 진행방향등을 구하고, 예인선과의 실시간 위치정보의 공유를 통한 정밀측정으로 안전하게 접안을 유도한다. 주 선박 및 예인선의 조타수는 PDA의 클라이언트 프로그램으로 실시간 전송되는 선박의 상태 및 각종 정보를 통해 진행상황을 알 수 있다. 또한, 시뮬레이션 프로그램으로 계산된 선박의 유도경로 데이터를 데이터베이스화하여 최적의 접안 경로를 제시함으로써, 기존의 접안환경보다 정밀한 상황 판단의 방법을 제시하였다.

• 한국항해항만학회:학술대회논문집
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• 한국항해항만학회 2006년도 International Symposium on GPS/GNSS Vol.1
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• pp.95-100
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• 2006

A ship collision avoidance system is developed to control the avoidance action of ship actually and properly in wind forces. The 4-DOF maneuvering equations of motion ar derived to catty out the simulation of the motion of a ship, and the wind forces are considered as the external forces in the simulation. This study suggests a new avoidance system that could include the ship's maneuvering characteristics.

• 전력전자학회논문지
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• 제20권1호
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• pp.45-50
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• 2015

The simulation model of All-Electric-Ship consists of electrical and mechanical systems. Running the total simulation requires considerable time and causes a lack of computer memory, because the two systems have different dynamic characteristics. Therefore, integrated simulation is practically impossible. This paper proposes the simplified model of electrical system to reduce simulation time significantly, compared to the detailed model. The validity of the proposed simplified model is verified by comparing detailed and simplified simulation results. Thus, the simplified models are applied to the integrated system. As a result, total system simulation can be implemented.