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

• Proceedings of the Korea Information Processing Society Conference
• /
• 2019.10a
• /
• pp.708-709
• /
• 2019

최근 국방 분야는 모델링 및 시뮬레이션 기술을 활용한 시뮬레이터 개발 사업을 늘리고 있으며, 특히 실 환경에서 시험하기 어려운 다양한 기능과 성능을 시험하기 위해 무기체계 시뮬레이터와 실 장비를 상호 운용할 수 있는 방안을 마련하고 있다. 본 논문은 함정에 탑재되는 대공유도무기체계 개발에 필요한 시뮬레이션 환경을 구축하는데 있어 시뮬레이션과 실환경을 상호 운용할 수 있는 시뮬레이터 설계 방법을 다루며, 특히 소프트웨어로 구현된 다양한 센서 모델과 실 환경에서 운용되는 레이더 및 표적기의 통합 운용이 용이한 센서 시뮬레이터의 구조를 보여준다.

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

• Journal of the Korea Society for Simulation
• /
• v.19 no.3
• /
• pp.81-89
• /
• 2010

Recent modeling and simulation technology is being used in various fields. Especially in the field of military, Simulation-Based Acquisition (SBA) is recognized as a essential policy. To effectively carry out SBA, modeling and simulation techniques should be applied in the whole life-cycle for the weapon system development, and simulation architecture framework which provides easily reusable and interoperability is needed. Through reusability and interoperability, the costs of constructing the integrated collaborate environment for simulation based acquisition can be minimized. In this study, we define requirements, issues for enhancing reusability and interoperability, and propose simulation framework as a solution of the problem including structural design. Proposing simulation framework provides common functions for producing simulator as reusable units and easily changeable structure on user's purpose. In addition, we provide the result for applying simulation framework to our project.

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

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

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.337-339
• /
• 2011

M&S 기반의 가상환경 설계운영은 자원절약 및 위험성 감소 등 다양한 측면에서 효율성을 지니고 있다. 국방은 현실세계에서 실시하기 어려운 군사작전 시뮬레이션 운영을 위해 국방 M&S 개념을 도입하고, 이를 기반으로 무기체계의 소요도출부터 전력화 단계까지 프로세스 전반에 걸쳐 가상 환경에서의 설계 운영 및 검증을 수행하는 SBA 를 도입하였다. 그러나 모델링 및 시뮬레이션 과정에서 발생되는 고비용, 위험성 등의 문제점은 SBA 도입 효율성에 대한 논란의 요인이 된다. 따라서 SBA 도입 효과를 입증할 수 있는 지표 제시가 요구되며, 이 연구에서는 입증 지표로서 비용, 시간, 품질 및 위험도의 4 가지 요소를 분석한다. 또한 소프트웨어 개발비용 산정의 어려움 및 SBA의 고비용 가능성을 이유로 SBA 에 대한 개발비용 산정의 필요성을 제기한다. SBA 개발비용 산정을 위해 기존에 제시된 소프트웨어 개발비용 산정 모델 적용을 제안하고, COCOMO 모델, Putnam 모델, FP모델, 전문가의 감정 및 델파이 기법 등 소프트웨어 개발비용 산정모델을 기반으로 SBA 개발비용 산정에 적합한 모델을 분석한다.

• Convergence Security Journal
• /
• v.13 no.1
• /
• pp.37-43
• /
• 2013

In 2010, the Ministry of National Defense decided to build a MegaCenter including the cloud computing technology by 2014, as part of the '2012 Information Service Plan', which is now underway. The Cloud computing system environment should be designed applying cloud computing technology and policy for an efficient infrastructure that many IT resources are available in the data center as a concentrated form. That is, the system should be designed in such a way that clouding services will be efficiently provided to meet the needs of users and there will not be unnecessary waste of resources. However, in order to build an optimal system, it should be possible to predict the service performance and the resource availability at the initial phase of system design. In this paper, using the CloudAnalyst simulator to predict availability of the K-defence cloud computing system service, conducts cloud modeling and analysis of the 'Facebook', one of the most famous social network service applications with most users in the world. An Optimal K-Defense cloud computing design model is proposed through simulation results.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.10b
• /
• pp.1253-1256
• /
• 2001

최근 모델링 및 시뮬레이션(M&S) 체계 구축 관련 기술들이 미 국방부를 중심으로 활발히 연구됨은 물론 민간 사업으로 확산되는 등 그 소요가 급속히 증가하고 있다. 또한 기존의 모형 및 개발 모형들도 차세대 연동 체계인 RTI(Run_Time Infrastructure)를 모형에 적용함으로써 HLA(High Level Architecture)를 포함한 차세대 M&S 체계의 핵심 기술을 조기에 획득하여 이를 개발하고 운용하는 능력을 확보하는 것이 시급히 요구되고 있다. 본 논문에서는 첨단 정보 기술의 결집체인 HLA 의 핵심 기술을 이용한 HLA 시뮬레이션 방법을 제시하였으며, HLA가 보장하는 상호 운용성과 재사용성을 모형 확장을 통해 확인하였다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.26 no.3
• /
• pp.311-320
• /
• 2008

A LIDAR can rapidly generate 3D points by densely sampling the surfaces of targets using laser pulses, which has been efficiently utilized to reconstruct 3D models of the targets automatically. Due to this advantage, LIDARs are increasingly applied to the fields of Defense and Security, for examples, being employed to intelligently guided missiles and manned/unmanned reconnaissance planes. For the prior verification of the LIDAR applicability, this study aims at generating simulated LIDAR data. Here, we derived the sensor equation by modelling the geometric relationships between the LIDAR sub-modules, such as GPS, IMU, LS and the systematic errors associated with them. Based on this equation, we developed a program to generate simulated data with the system parameters, the systematic errors, the flight trajectories and attitudes, and the reference terrain model given. This program had been applied to generating simulated LIDAR data for urban areas. By analyzing these simulated data, we verified the accuracy and usefulness of the simulation. The simulator developed in this study will provide economically various test data required for the development of application algorithms and contribute to the optimal establishment of the flight and system parameters.