• Journal of the Korea Society of Computer and Information
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• v.23 no.4
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• pp.139-145
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• 2018

In this paper, we propose the methodology and system to show weather information to spatial system. When using the spatial information system, it is easy and convenient to show information such as target location, mission contents, enemy threats and so on. However, drawing 1-dimensional weather information on 3-dimensional space in spatial information system is hard task. To fuse data, we need to add a spatial layer including weather information to spatial layers and perform space modeling for showing weather information as spatial data in a virtual space. The virtual space is shown by receiving meteorological data and then changing in real time through weather database linkage.

• Journal of the Korea Society of Computer and Information
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• v.23 no.1
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• pp.1-7
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• 2018

The Korean Air Force FA-50 aircraft currently operating in the Air Force is using Ultra High Frequency (UHF) frequency communications for navigation communications with ground control stations or other aircraft. The pilot communicates by changing frequency at any time during flight, and performs communication by directly inputting from the Integrated Up-Front Controller installed in the cockpit. The frequency is designated as secret, and the pilot receives the task with the frequency channel number (001~xxx) and finds the frequency of the channel in the list of 4,000 frequency channels and inputs it manually. This reduces the safety and convenience of pilots' operations and exposes them to hazards that may occur especially during night flight missions. In this paper, we propose a function to embed the frequency corresponding to the frequency channel list in IMDC, the aircraft mission computer, and to automatically change the frequency when the pilot only inputs the channel number.

• 제어로봇시스템학회:학술대회논문집
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• 1996.10b
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• pp.507-510
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• 1996

In this paper we present the multi-agent robot system developed for participating in micro robot soccer tournament. The multi-agent robot system consists of micro robot, a vision system, a host computer and a communication module. Mcro robot are equipped with two mini DC motors with encoders and gearboxes, a R/F receiver, a CPU and infrared sensors for obstacle detection. A vision system is used to recognize the position of the ball and opponent robots, position and orientation of our robots. The vision system is composed of a color CCD camera and a vision processing unit. Host computer is a Pentium PC, and it receives information from the vision system, generates commands for each robot using a robot management algorithm and transmits commands to the robots by the R/F communication module. And in order to achieve a given mission in micro robot soccer game, cooperative behaviors by robots are essential. Cooperative work between individual agents is achieved by the command of host computer.

• Journal of Korea Multimedia Society
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• v.25 no.8
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• pp.1007-1021
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• 2022

Autonomous driving of unmanned aerial vehicles may have to pay expensive cost to create and switch new routes if unexpected obstacles exist or local map updates occured by the control system due to incorrect route information. Integrating digital twins into the path-following process requires more computing resources to quickly switch the wrong path to an alternative path, but it can quickly update the path during flight. In this study, we design a DEVS-based simulation environment which can modify optimized paths through short-term simulation of multi-virtual UAVs for applying digital twin concepts to path follow. Through simulation, we confirmed the possibility of increasing the mission stability of UAV.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.07a
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• pp.271-272
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• 2021

본 논문에서는 Gazebo 시뮬레이터 기반 UAV 군집 시뮬레이션 구현 및 비행 고도 계층화를 구현한 결과를 보인다. Gazebo 시뮬레이션과 Autopilot Program인 Pixhawk4 SITL(Software In The Loop)을 이용하여 UAV를 시뮬레이터에 생성한 뒤 사전에 정의된 Mission에 대한 정보에 따라 비행이 되도록 구현하였다. 또한, Gazebo 시뮬레이터의 Box Object를 이용하여 UAV의 비행 고도를 시각적으로 계층화하여 표현하였다.

• Journal of Internet Computing and Services
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• v.23 no.5
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• pp.111-126
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• 2022

As operations that were only conducted in physical space in the past change to operations that include cyberspace, it is necessary to analyze how cyber attacks affect weapon systems using cyber systems. For this purpose, it would be meaningful to analyze a tool that analyzes the effects of physical weapon systems in connection with cyber. The ROK military has secured and is operating the US JMEM, which contains the results of analyzing the effects of physical weapon systems. JMEM is applied only to conventional weapon systems, so it is impossible to analyze the impact of cyber weapon systems. In this study, based on the previously conducted cyber attack damage assessment framework, a framework for analyzing the impact of cyber attacks on physical missions was presented. To this end, based on the MOE and MOP of physical warfare, a cyber index for the analysis of cyber weapon system effectiveness was calculated. In addition, in conjunction with JMEM, which is used as a weapon system effect manual in physical operations, a framework was designed and tested to determine the mission impact by comparing and analyzing the results of the battle in cyberspace with the effects of physical operations. In order to prove the proposed framework, we analyzed and designed operational scenarios through domestic and foreign military manuals and previous studies, defined assets, and conducted experiments. As a result of the experiment, the larger the decrease in the cyber mission effect value, the greater the effect on physical operations. It can be used to predict the impact of physical operations caused by cyber attacks in various operations, and it will help the battlefield commander to make quick decisions.

• Journal of Satellite, Information and Communications
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• v.12 no.3
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• pp.103-107
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• 2017

The Satellite OBC(On Board Computer) manages critical functionality such as satellite attitude control, fault management, payload management, command/telemetry processing etc. The OBC consist of various modules. Each module perform mission critical operation. So all modules designed as hot or cold redundancy architecture. The redundancy design gives a guarantee high reliability and it allows normal operation of satellite using reconfiguration capability. In this paper, introduces reconfiguration unit operation and describe the results of testing in the ETB.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.32 no.10
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• pp.142-146
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• 2004

Spaceborne earth observation or astronomical payloads often use Cassegrain-type telescopes due to limits in mass and volume. Precision optical alignment of such a telescope is vital to the success of the mission. This paper describes the alignment simulation and experiment of computer-aided alignment method during the assembly of MAC (Medium-sized Aperture Camera) telescope for spaceborne earth observation.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.703-705
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• 2002

최근 컴퓨터 해킹이 커다란 사회적 문제로 대두되고 있다. 물론 시스템 보호를 위한 많은 상용 제품들이 존재하지만, 침입피해 상황에서는 대부분의 경우, 시스템 관리자의 현장 경험에 의존하는 실정이다. 따라서 시스템 관리자는 기존의 침입에 관한 해결방법 뿐만 아니라, 새로운 위협들에 대한 대처방안을 항상 준비 하여야 한다. 이러한 침입상황을 시스템 관리자들에게 교육하기 위하여, 본 논문에서는 모의 훈련환경을 설계하고 구현하였다. 본 시스템의 특징은 우선, 지식베이스로부터 동적으로 생성되는 학습 주제들로 이루어진 교과 과정을 학습자에게 제시한다. 학습자에 의해 선택된 학습 주제는 학습목표로 간주되고, 이 주제는 교수 계획에 의해 다수의 임무(mission)들을 생성한다. 학습자는 각 임무에서 주어진 상황을 가상의 UNIX명령어들을 직접 사용하여 모의 실험해 봄으로써 임무 완수에 필요한 지식을 숙지할 수 있게 된다. 시스템은 임무 완수에 요구되는 해 경로(solution paths)를 유지함으로써, 학습자의 문제 해결 과정을 감독할 수 있고, 도움을 요구하거나 실수를 할 때 적절한 힌트를 제공한다. 시스템은 웹 기반의 클라이언트/서버 구조로 설계되어, 학습자는 브라우저만으로도 학습이 가능하고, 자바 애플릿으로 이루어진 가상 운영체제 하에서 직접 침입대처 상황을 학습 할 수 있다.

• 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.