• Smart Media Journal
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• v.6 no.4
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• pp.65-71
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• 2017

In this paper, we propose a design method for the construction of LTE-based small unmanned aerial vehicle control system to quickly and reliably collect multiple small unmanned aerial vehicle position information simultaneously flying all over the country. In particular, the main requirements are the network (N/W), hardware (H/ W), software(SW), Database(DB), development architecture, and business needs. To satisfy these requirements, N/W, H/W, SW, DB design, and architectural design plan were suggested regarding the design requirements of a small UAV system. To effectively control the small unmanned multi-party system in the system design, the architecture is divided into the front-end service area and the back-end service area according to the function and role of the unit system. In the front-end service area that grasps and controls the position and state of small unmanned aerial vehicles (UAVs), we have studied the design part that can be expanded to N through TCP/IP network by applying Client PC method.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.30 no.5
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• pp.389-398
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• 2019

In this paper, we propose a method to detect small unmanned aerial vehicles(UAVs) flying in a real-world environment. Small UAV signals are frequently obscured by clutter signals because UAVs usually fly at low altitudes over urban or mountainous terrain. Therefore, to obtain a desirable detection performance, clutter signals must be considered in addition to noise, and thus, a performance analysis of each clutter removal technique is required. The proposed detection process uses clutter removal and pulse integration methods to suppress clutter and noise signals, and then detects small UAVs by utilizing a constant false alarm rate detector. After applying three clutter removal techniques, we analyzed the performance of each technique in detecting small UAVs. Based on experimental data acquired in a real-world outdoor environment, we found it was possible to derive a clutter removal method suitable for the detection of small UAVs.

• Transactions of the KSME C: Technology and Education
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• v.3 no.1
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• pp.71-78
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• 2015

Although there are differences in the classification of category adopted by each country, small UAS is usually classified as the one less than 25 kg. UAS has been mainly used for military and public purposes, but in recent years, it has spread to the private sector for hobby, media, and so on. Especially, considering the nature of the operating region and applications, it is necessary to improve operating time, noise and vibration in small UAS to ensure the same level of safety with a manned aircraft. This is because the drone can pose health and safety hazard through collision with manned aircraft or crashing into the ground. In this paper, we investigated operational regulations in the United States and European countries. Based on the investigation, a domestic system development plan for small UAS operation is under development.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.47-49
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• 2015

무인항공기는 일반 유인항공기와는 다르게 크기의 제한이 없다. 또한 작은 사이즈의 무인항공기는 적은 인원의 투입으로도 항공기 각 분야의 검증이 가능하므로 소형화된 무인기는 여러 회사 및 연구원 학교등에서 개발되고 있다. 항공기의 크기가 작아지게 되면 운영요원의 숫자 또한 작아지게 되고 이로 인하여 쉽게 이동이 가능하고 운영이 가능한 이동형 무인항공기 지상통제 시스템의 요구가 생기게 된다. 본 논문에서는 한국항공주우연구원의 소형 무인기를 운영하기 위해 개발한 이동형 무인항공기 지상관제 시스템에 관하여 기술 하였다.

• Journal of Advanced Navigation Technology
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• v.21 no.1
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• pp.145-152
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• 2017

As a popularization of small UAS to have improved flight performance and easiness of controlling, the UAS industry is increased and also small UAS is to be a new threat for airspace security of national strategic infrastructure. Rising the new threat makes the negative side effect of small UAS operation. This phenomena brought to new R&D needs "defense system" for small UAS/UAV - called Anti-Drone. The paper addressed case study of defects, accidents and threats by small UAS/UAV as world wide level, and research and development trend of UAS defense system as each technical category - CONOP (Concept of Operation), identification/recognition method and control/supremacy techniques. As a result, this suggests the direction what and where drone defense system should be applied first and required for Korean society in the view of society system (regime) and a point of view for minimizing side effect as UAS popularization.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.04a
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• pp.219-221
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• 2011

This paper reports the development trend of small fuel cell unmanned aerial vehicles. Development method of a fuel cell propulsion system for small unmanned aerial vehicles is proposed and discussed, such as the lightweight fuel cell stack development, liquid fuel-based hydrogen storage/generation, and fuel cell system technology.

• Aerospace Engineering and Technology
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• v.4 no.1
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• pp.260-267
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• 2005

An electronic spark ignition unit has been developed for gasoline for small UAV. The unit is programmable to adjust the optimal ignition advance angle in accordance with rpm and intake pressure. Initial advance angle and the position of Hall sensor on the engine can be set from PC via serial interface. The results are expected to be valuable core technology of powerplants in developing small UAV's.

• 한국항공운항학회:학술대회논문집
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• 2016.05a
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• pp.39-47
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• 2016

150미터(500피트) 이하의 공역에서 무인기 택배 등의 활용을 목적으로 고속 비행이 요구되는 소형무인기(드론)의 순항을 가정하여 안전 분리 간격을 고려한 고속 비행 공역을 제안하고, 해당 경로에서 무인기간의 충돌방지를 위한 항법시스템의 성능요구조건과 안전한 분리 간격에 대한 선행 연구 분석과 고찰 결과를 제시한다.

• Convergence Security Journal
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• v.20 no.1
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• pp.77-84
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• 2020

Due to the lack of a system that can detect/identify and strike North Korea's small unmanned aerial vehicles, no immediate response was made. In order to solve the problem of response, we should prepare for threats by developing weapons systems that can be immediately hit when identifying small-sized unmanned aerial vehicle detection radar and creating specialized research organizations for research and development of equipment.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.49 no.12
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• pp.971-980
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• 2021

Recently popularized drone technologies have revealed that low-cost small unmanned aerial vehicles(UAVs) can be a significant threat to prevailing power by operating in group or in swarms. Researchers in many countries have tried to utilize integrated swarm unmanned aerial system(SUAS) in the battlefield. Agency for Defense Development also identified four core technologies in developing SUAS: swarm control, swarm network, swarm information, and swarm collaboration, and the authors started researches on swarm control and network technologies in order to be able to operate vehicle platforms as the first stage. This paper introduces design and integration of SUAS consisting of small fixed-wing UAVs, swarm control and network algorithms, a ground control system, and a launcher, with which swarm control and network technologies have been verified by flight tests. 19 fixed-wing UAVs succeeded in swarm flight in the final flight test for the first time as a domestic research.