• 한국시뮬레이션학회논문지
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• 제29권2호
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• pp.63-72
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• 2020

다양한 무기체계 중 대표적인 지상 무기체계인 전차는 각국의 핵심 전력 중 하나로, 전차의 운용 개념과 효과도 분석을 통해 과학적 분석 기반의 비용 효과적인 연구개발을 할 수 있다. 이를 위하여 교전 시뮬레이션 기술이 활용될 수 있는데, 전차 무기체계를 모델링함에 있어 전차의 기동, 통신 등과 같은 물리적인 요소뿐만 아니라, 운용교리를 반영한 효과분석을 위하여 전차장 등의 의사결정을 모델링하는 논리 모델도 중요하다. 이 논문에서는 무기체계 통합시뮬레이션 소프트웨어(AddSIM)에서 제공하는 무기체계 모델의 표준 아키텍처인 기본체계모델(Base System Model, BSM)에 맞추어 전차 교전 시뮬레이션에 필요한 전차 BSM 설계방법에 대하여 논한다. 특히 논리 모델을 인간 의사결정 모델에 근거하여 세분화하였으며, DEVS 형식론이라는 수학적 형식론에 기반한 정형적인 모델링 방법으로 모델링하였다. 그 결과 전차 BSM을 계층적이고 모듈화된 형태로 제안하였다. 제안하는 방법은 향후 우리 군의 전차 운용 개념 연구와 전차의 효과분석 등에 활용될 것으로 기대된다.

• 한국국방경영분석학회지
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• 제25권1호
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• pp.199-214
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• 1999

The Constructive Battle Simulation Model is very important to the recent military training for the substitution of the field training. However, real battlefield systems operate under real-time conditions, they are inherently distributed, concurrent and dynamic. In order to reflect these properties by the computer-based simulation systems which represent real world processes, we have been developing constructive simulation model for several years. Conventionally, scheduling and resource allocation activities which have timing constraints, we elaborated on these issues and developed the simulation system on commercially available hardware and operating system with lock-free resource allocation scheme and rate monotonic scheduling.

• International Journal of Aeronautical and Space Sciences
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• 제18권1호
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• pp.108-117
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• 2017

This paper presents a distribution simulation model for dual purpose improved conventional munitions based on flight test data. A systematic procedure for designing a dispersion simulation model is proposed. A new accumulated broken line graph was suggested for designing the distribution shape. In the process of verification and simulation for the distribution simulation model, verification was performed by first comparing data with firing test results, and an application simulation was then conducted. The Monte Carlo method was used in the simulations, which reflected the relationship between ejection conditions and real distribution data. Before establishing the simulation algorithm, the dominant ejection parameter of the submunitions was examined. The relationships between ejection conditions and distribution results were investigated. Five key distribution parameters were analyzed with respect to the ejection conditions. They reflect the characteristics of clustered particle dynamics and aerodynamics.

• 한국CDE학회논문집
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• 제20권3호
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• pp.221-229
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• 2015

M&S (Modeling & Simulation) based design is widely accepted for the development of the future weapon system with better performance in a cheaper and faster way. Integrated simulation environment (ISE) is needed for the M&S based design. On the ISE, system engineers can not only verify design options but also validate system requirements. In this paper, we propose architectural models of the integrated simulation environment (ISE) which incorporates mission effectiveness M&S (Modeling & Simulation), system performance M&S, the optimization model of integrated performances, digital mockup and virtual prototype. The ISE architectural models may be used to implement the ISE for the development of the future unmanned ground combat vehicle.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2004년도 춘계학술대회 논문집
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• pp.136-140
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• 2004

A power-plant simulation tool has been developed for training the plant operators and testing a plant control system. The simulation tool is composed of a graphic editor, a component model builder and a system simulation solver. Such new programing techniques as object-oriented modeling and GUI(Graphical User Interface) are employed in developing the simulation tool. The graphic editor is based on the OpenGL library for effective implementation of GUI while the component model builder is based on object-oriented programming for efficient generalization of component models. The developed tool has been verified through the simulation of a real power plant.

• 국제학술발표논문집
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• The 3th International Conference on Construction Engineering and Project Management
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• pp.1359-1363
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• 2009

The object of this research is to develop a simulation system for earthmoving operations in consideration of the impact of congestion in-between equipment and existing traffic flow around the site. The congestion in-between equipment and traffic flow affect work productivity. The conventional discrete event simulation, however, has limitations in simulating the flow of construction equipment. To consider the impact of congestion in-between equipment and existing traffic flow, in this paper, a multi-agent based simulation model that can realize characteristics of truck behavior more accurately to consider the impact of congestion was proposed. In this simulation model, multiple agents can identify environmental changes and adapt themselves to the new environment. This modeling approach is a better choice for this problem since it describes behavioral characteristics of each agent by sensing changes in dynamic surroundings. This study suggests a detailed system design of the multi-agent based simulation system.

• 한국수자원학회논문집
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• 제46권4호
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• pp.373-387
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• 2013

수자원시스템의 효율적인 운영 및 관리를 위해서는 하천 시설물들을 효율적으로 연계운영 할 필요가 있다. 그러나 이를 위한 시뮬레이션 모형은 최선의 대안을 보장하지 못하고, 최적화 모형은 복잡한 수계 현황을 유연하게 고려하는데 어려움이 있다. 따라서 시뮬레이션과 최적화 기법의 한계점을 서로 보완해서 활용하는 것이 바람직하다. 이에 본 연구에서는 시뮬레이션과 최적화 기법의 원론적 비교를 통해 각 기법의 장 단점을 분석하고, 두 방법의 한계점을 극복할 수 있는 시뮬레이션 기반의 최적화 모형, CoWMOM의 활용을 제안한다. 아울러 댐-보 연계운영 모형의 활용방안으로 i) 과거의 특정 기간에 대한 분석 도구로써의 활용법과, ii) 미래 수문 정보가 불확실한 상황에서 댐-보 연계운영을 하는 현실에 적합한 모형 활용 절차를 제시한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.911-914
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• 2005

Soft tissue characterization and modeling based on living tissues has been investigated in order to provide a more realistic behavior in a virtual reality based surgical simulation. In this paper, we characterize the nonlinear viscoelastic properties of intra-abdominal organs using the data from in vivo animal experiments and inverse FE parameter estimation algorithm. In the assumptions of quasi-linear-viscoelastic theory, we estimated the nonlinear material parameters to provide a physically based simulation of tissue deformations. To calibrate the parameters to the experimental results, we developed a three dimensional FE model to simulate the forces at the indenter and an optimization program that updates new parameters and runs the simulation iteratively. The comparison between simulation and experimental behavior of pig intra abdominal soft tissue are presented to provide a validness of the tissue model using our approach.

• 한국정밀공학회지
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• 제20권5호
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• pp.47-56
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• 2003

Geometric cutting-simulation and verification play an important role in detecting NC machining errors in mold & die manufacturing and thereby reducing correcting time & cost on the shop floor. Current researches in the area may be categorized into view-based, solid-based, and discrete vector-based methods mainly depending on workpiece models. Each methodology has its own strengths and weaknesses in terms of computing speed, representation accuracy, and its ability of numerical inspection. The paper proposes a hybrid modeling scheme for workpiece representation with z-map model and discrete vector model, which performs 3-axis and 5-axis cutting-simulation via tool swept surface construction by connecting a sequence of silhouette curves.

• 대한기계학회논문집 C: 기술과 교육
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• 제3권1호
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• pp.1-13
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• 2015

실외 열교환기의 착상 및 제상조건 하에서 VRF 멀티형 히트펌프의 동적 거동의 해석을 위한 시뮬레이션 기법이 제안되었다. 이를 위해 열전달-물질전달 완벽 상사 가정에 기반한 간단한 착상모델과 제상 모델이 제안되었다. 제안된 착제상 모델은 용량가변 압축기 모델과, 미소면적에 대한 열 및 모멘텀 평형에 근거한 열교환기 모델을 채택한 동적 사이클 해석모델에 적용되었다. 따라서, 제안된 모델은 공간에 대해 비균질 착상을 자연스럽게 예측할 수 있다. 개발된 동적 사이클 해석 모델은 실험결과와 비교하여 능력 및 효율을 10% 이내에서 잘 예측함을 확인하였다. 최종적으로, 개발된 모델은 표준적인 건물의 난방시즌 운전 해석에 적용되었으며, 착상 및 제상으로 인하여 동절기의 계절 성능계수를 7% 가량 하락 시킴을 보일 수 있었다.