• Proceedings of the Korea Multimedia Society Conference
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• 2012.05a
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• pp.177-179
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• 2012

본 논문에서는 시뮬레이션 모델의 상호운용성, 재사용성 및 조립가능성을 높이기 위해 온톨로지 기반의 개념 모델링 프레임워크인 CMMS-K(The Conceptual Models of the Mission Space-Korea)를 제안한다. 군도메인 시나리오 기술에서 행위(action)은 핵심적인 역할을 한다. 그러므로, CMMS-K는 행위를 체계적이고 효과적으로 표현하기 위해 과제 온톨로지를 기반으로 하여 국방 개념을 모델링한다.

• Journal of the Korea Society for Simulation
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• v.30 no.4
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• pp.21-29
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• 2021

Inverse synthetic aperture radar (ISAR) image is a powerful tool to show the major scattering regions (scatterer points) on the target. It is normally used to identify and classify targets. Finding information for the scatter points of ISAR image plays an important role in modeling the features of targets. In this paper, we propose a modeling method to extract some information about the scatterer points by minimizing approximating error. Here, the extracted information include not only the location of scatterer points but also some statistical data about the error of the their location. These extracted data can be used to implement the randomness of the location of the scatterer points. Furthermore, we reconstruct an image from the extracted data for scatterer points obtained by our proposed method. And we show that the reconstructed ISAR image is well approximated to the original ISAR image in order to justify our proposed modeling method.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.1375-1378
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• 2011

국방 분야의 모델링 및 시뮬레이션(Modeling & Simulation) 분야에서 재사용성 및 상호운용성 확보는 기 개발된 모델을 연동하여 시뮬레이션을 확장할 수 있다는 측면에서 핵심이 된다. 이러한 핵심기술 확보를 위해 시뮬레이션 소프트웨어의 공통 컴포넌트를 설계하고, 표준 연동 미들웨어인 Run-Time Infrastructure(RTI)를 적용한 프레임워크가 개발되었다. 한편, 시뮬레이션 환경은 목적에 따라 시뮬레이션 모델의 기능이 달라지거나, 동일한 모델이 분산 컴퓨팅뿐만 아니라 단일 컴퓨팅 환경에서도 수행되도록 요구된다. 본 논문은 이러한 요구사항을 만족시킬 수 있도록 모델 연동을 위한 플러그인 방식의 인터페이스 설계 방안을 제시하고, 분산 시뮬레이션의 동일한 모델을 단일 시스템에서 시뮬레이션 할 경우 모델 컴포넌트 간 데이터 교환 및 메시지 순서화를 제공할 수 있는 메커니즘을 기술한다.

• Journal of the military operations research society of Korea
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• v.34 no.2
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• pp.27-42
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• 2008

This study simulated the effect of the quantity flexibility contract(QFC) on the Korean military inventory system. The results shows that the QFC make the inventory system more efficient. For validity of this study, we assume the basic four demand patterns (increase, decrease, high variation and long seasonality) which are the exogenous variables of these simulation systems. We measured the difference of the traditional military inventory system's and new QFC system's performances. Under the all demand patterns, QFC models have little inventory than the traditional systems. We suggest, therefore, the military change the supply contract into QFC for decrease inventory and expect the results of this study applied to the company level.

• Journal of the Korea Society for Simulation
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• v.22 no.2
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• pp.73-83
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• 2013

This paper presents design and implementation of the monitoring system for the distributed simulation of underwater warfare. As importance of defense modeling and simulation(M&S) has raised, Simulation-Based Acquisition(SBA) was authorized for an obligatory process in the development process of weapon systems. Yet, it requires tremendous resources to develop a large-scale simulation system that describes complex and broad battlefields. Therefore, an approach of the distributed system was devised to develop a new simulation system combining legacy simulators that were developed for confined purpose and sole operations. High-Level Architecture(HLA) of distributed systems is a standardized protocol by IEEE for the distributed simulation system and Run-Time Infrastructure(RTI) is an implementation of HLA to structure efficient distributed systems. The main objective of this paper is to derive appropriate monitoring factors for underwater warfare simulation, design and implementation of the monitoring system to analyze the factors based on HLA/RTI.

• Journal of the Korea Society for Simulation
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• v.24 no.4
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• pp.69-76
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• 2015

Modern warfare, which adopt an intensive technique of applied sciences, is difficult to predict, and has a high complexity. Thus, it is necessary to build a battle-field environment and simulation-based analysis. Various organizations are participated to build battlefield model for defense M&S according to a scale and format. On the basis of this trend, approaching from various systems is needed to reconfigure battlefield modeling for distributed system. This paper proposes building design for battlefield simulation environment with a sample of one-to-one single unit engagement model. The proposed method can expect to utilize an example of distributed environment for various participants that are involved in battlefield modeling and simulation.

• Journal of the Korea Society for Simulation
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• v.19 no.4
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• pp.249-259
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• 2010

Synthetic environment data used in defense M&S fields, which came from various organization and source, are consumed and managed by their own native database system in distributed environment. But to manage these diverse data while interoperation in HLA/RTI environment, neutral synthetic environment data model is necessary to transmit the data between native database. By the support of DMSO, SEDRIS was developed to achieve this requirement and this specification guarantees loss-less data representation, interchange and interoperability. In this research, to use SEDRIS as a standard simulation database, base research, visualization for validation, data interchange experiment through test-bed was done. This paper shows each research case, result and future research direction, to propose standardized SEDRIS usage process.

• 한국디지털정책학회:학술대회논문집
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• 2005.11a
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• pp.581-593
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• 2005

최근 기술 중 국방, 교육, 오락 등 다양한 산업 분야의 핵심 기술로 부상하고 있는 "모델링 및 시뮬레이션 (M&S: Modeling & Simulation)"에 관한 기술 연구와 어플리케이션 개발이 활발하게 이루어지고 있다. 특히 e-Learning 산업분야와 관련하여 가상현실 또는 가상 시뮬레이션 기술로 대표되는 가상 시뮬레이터 교육 구현 기술에 관하여 집중적으로 조명되고 있다. 그러나 이를 만족시킬 수 있는 가상 시뮬레이션 기술에 공통으로 적용할 수 있는 표준 기술은 현재 매우 부족한 상태이다. 따라서 본 논문에서는 e-Learning 분야의 학습효과를 증대하기 위한 목적으로 가상 시뮬레이션 데이터 요소, 즉 이와 관련된 기재 사항들의 기재 방식에 관한 표준 기술을 정의하고, 이를 표준 요소들로 제안한다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06c
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• pp.253-255
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• 2006

국방정보보호 통합관리 기술을 개발하기 위한 테스트베드 구축에서 중요한 부분 중에 하나인 정보보호 가상망 모델링 시뮬레이션 시스템을 개발하였다. 본 시스템은 실재 망과 유사한 정보보호 환경을 제공하기 위하여 정보보호 환경을 구성하는 정보보호 객체(호스트, 네트워크, IDS, IPS, FW, VW 등)를 모의하고 망의 트래픽(평상시, 사이버 공격 시)을 모의하는 등의 기능을 제공하고 외부의 보안관제 체계 및 모의 공격기와 연동하는 인터페이스를 제공하여 외부 침입탐지체계의 성능을 검증하거나 취약점 분석을 위한 환경을 제공한다.

• Journal of the Korean Society for Precision Engineering
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• v.13 no.12
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• pp.54-62
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• 1996

To get the time response characteristics of the hydrostatic transmission, seaborne winch is modelde by using bond graphs. After modeling of its basic elements, it is represented as power flow, and the determination of variable causality. The state equations are derived by using CAMP. As dynamic stabilites and solutions are investigated by perturbation method and direct integration, winch system is stable. Simulations are performed under the conditions of low speed, high speed, and maximum tension. The pressure and flow rate of the hydrostatic transmission have a big overshoot. But when it is comparaed to the empirical data with simulation results, it is similar to each other. When a lead compensator is applied to improve response characteristics of the hydrostatic transmission, rise time and overshoot of the system are improved.