• Proceedings of the Korean Society of Computer Information Conference
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• 2016.07a
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• pp.7-8
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• 2016

Ad-hoc 네트워크 기술이 발달함에 따라 FANET(Flying Ad-Hoc Notworks)을 이용한 그룹 무인기 정찰이 요구되고 있다. 본 논문에서는 자율비행을 위한 효율적인 그룹 무인기 정찰을 위하여 새로운 이동성 모델을 제안한다. 제안하는 모델은 Random Waypoint에 기반 하는 모델로써 정찰되지 않은 구역의 선택 확률을 높여 균형적 탐색을 유도한다. 시뮬레이션을 이용하여 제안하는 모델이 기존의 Random Waypoint 에 비해 80% 정찰비율 시간 향상 면에서 우수함을 보인다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.394-396
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• 2017

In various types of UAV systems, which have been developed recently, the communication system that is responsible for the connection between the ground control unit and the UAV is called the data link.Especially, in the data link used in systems for transmission of surveillance images from UAV in real time, stability of communication should be ensured. In this paper, the design of the data link modem was proposed for the purpose of applying for UAV for surveillance. And, the designed wad verified through the performance measurement of the implemented systems.

• Proceedings of the KAIS Fall Conference
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• 2010.05b
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• pp.1153-1155
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• 2010

본 논문에서는 무인정찰기 카메라의 진동에 대한 해석을 동역학 해석 프로그램 ADAMS를 통하여 수행하였다. 정찰시 카메라에 진동이 발생할 경우 시선 불안정화에 의해 정확한 촬영이 불가하다. 이에 진동을 감소시키기 위한 방진구의 최적화를 위하여 정적 처짐량 및 비행기의 운행에 따른 진동에 대한 해석으로 sine sweep, RMS white noise에 대한 해석을 수행하고자 한다.

• Aerospace Industry
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• s.93
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• pp.42-43
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• 2006

최근 무인기 개발이 활발하게 이뤄지면서 무인기 시대 도래를 앞두고 있다. 특히 군사용 무인기 운용은 이미 상당히 진행되고 있는 상황으로 정찰에서부터 공격에 이르기까지 다양한 분야에 걸쳐 실용화되고 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.1
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• pp.162-168
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• 2018

The UAV(Unmanned Aerial Vehicle) system, including the drone of a variety of fields, which has become an issue and utilized in various fields, has begun to develop in military fields and is actively developed in the commercial field. In various types of UAV systems, which have been developed recently, the communication system that is responsible for the connection between the ground control unit and the UAVs is called the data link. Especially, common data link used in military UAVs is required stability of communication to transmit surveillance and reconnaissance intelligence information and UAV's status. In this paper, the requirement for a modem was defined to secure the communication stability of the common data link used in surveillance UAVs. And, the design of the data link modem to satisfy applicable specifications was proposed. The proposed modem design was verified through the performance measurement of the implemented systems.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.11B
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• pp.1732-1737
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• 2010

Currently, one of the main purposes of the military using Unmanned Air System (VAS) is to perform surveillance and reconnaissance of hostile enemy. To carry out their mission, Unmanned aerial vechicle (UAV) transmits video images to ground control station using ISR devices installed on the UAV. After receiving the images, the ground control station distribute them to various type of users. At this case, it is important to keep QoS. This paper presents data delivery and QoS managements using DDS for DDS for UAV video images. The experiment result, based on H.264 and JPEG2000, shows that DDS standard is able to be applied to video image transmission for UAS.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.211-217
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• 2019

In an complicated battlefield environment, information from enemy's camp is an important factor in carrying out military operations. For obtaining this information, the number of UAVs that can be deployed to the mission without our forces' loss and at low cost is increasing. Because the mission environment has anti-aircraft weapons, mission space is needed for UAV to guarantee survivability without being killed. The concept of Configuration Space is used to define the mission space considering with range of weapons and detect range of UAV. UAV must visit whole given area to obtain the information and perform Coverage Path Planning for this. Based on threats to UAV and importance of information that will be obtained, area that UAV should visit first is defined. Grid Map is generated and mapping threat information to each grid for UAV path planning. On this study, coverage conditions and path planning procedures are presented based on the threat information on Grid Map, and mission space is expanded to improve detection efficiency. Finally, simulations are performed, and results are presented using the suggested UAV path planning method in this study.

• Journal of the Korea Society for Simulation
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• v.27 no.4
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• pp.47-60
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• 2018

Today's unmanned technology, which is being used in various industries, is expected to be able to make autonomous judgements as autonomous technology matures, in the long run aspects. In order to improve the usability of unmanned system in the military field, it is necessary to develop a technique for systematically and quantitatively analyzing the efficiency and effectiveness of the unmanned system by means of a substitute for the tasks performed by humans. In this paper, we propose the method of representing rule-based tactical behavior and modeling manned and unmanned reconnaissance agents that can effectively analyze the path alternatives which is required for the future armored cavalry to establish a reconnaissance mission plan. First, we model the unmanned ground vehicle, small tactical vehicle, and combatant as an agent concept. Next, we implement the proposed agent behavior rules, e.g., maneuver, detection, route determination, and combatant's dismount point selection, by NetLogo. Considering the conditions of maneuver, enemy threat elements, reconnaissance assets, appropriate routes are automatically selected on the operation area. It is expected that it will be useful in analyzing unmanned ground system effects by calculating reconnaissance conducted area, time, and combat contribution ratio on the route.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.10
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• pp.829-839
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• 2021

Autonomous system for UAVs has a capability to decide an appropriate current action to achieve the goal based on the ultimate mission goal, context of mission, and the current state of the UAV. We propose a decision-making system that has an ability to operate ISR mission autonomously under the realistic limitation such as low altitude operation with high risk of terrain collision, a set of way points without change of visit sequence not allowed, and position uncertainties of the objects for the mission. The proposed decision-making system is loaded to a Hardware-In-the-loop Simulation environment, then tested and verified using three representative scenarios with a realistic mission environment. The flight trajectories of the UAV and selected actions via the proposed decision-making system are presented as the simulation results with discussion.

• Electronics and Telecommunications Trends
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• v.32 no.1
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• pp.82-92
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• 2017

최근 들어 무인기와 무선통신기술의 비약적인 발전은 무인기들을 국가 공역에 진입시켜 운행할 필요성과 택배, 긴급 통신영역 확장, 재해 감시 및 대처, 위험지역 정찰, 항공촬영과 같은 다양한 분야로의 활용에 대한 요구를 크게 증가시켰다. 다수의 무인기를 안전하게 운행 및 조종하기 위해서는 고신뢰성 및 고보안성을 제공하는 무인기 제어 전용 네트워크가 요구되며, 이러한 네트워크를 무인기 제어용 통합 네트워크라고 한다. 본고는 무인기 제어용 통합 네트워크의 보안 적용 구간을 분류하고, 구간별로 보안 요구사항과 요구사항을 달성할 수 있는 보안기술들을 차례로 제시한다. 또한, 향후에 무인기 제어용 통합 네트워크의 보안성을 강화하기 위해 개선되어야 하는 부분들을 제시한다.