• 한국생산제조학회지
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• 제26권2호
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• pp.230-237
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• 2017

Various drones have extended application area very fast. In this paper, we define two contradictions in designing a portable-size drone by using TRIZ technique. The first is a physical contradiction between high rigidity and good portability, and the second is a technical contradiction between high stability and good portability. Through TRIZ technique, six design principles, which guide direction for optimal design, were driven. Consequently, an umbrella mechanism and design criteria were proposed for a portable-size drone. Detail design is verified through finite element method. Test results for the portable-size prototype drone show good performance, and prove its usefulness to be equivalent to a general full-size drone.

• International Journal of Advanced Culture Technology
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• 제12권2호
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• pp.286-298
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• 2024

The rapid advancement of drone technology has significantly altered the landscape of modern warfare, presenting both opportunities and challenges for military forces worldwide. As drones become increasingly sophisticated, capable of performing complex missions such as reconnaissance, surveillance, and precision strikes, the development of effective air defense systems has become a critical priority. This study examines the current state of drone and air defense technologies, analyzing their impact on military strategies, tactics, and the future battlefield environment. By exploring the patterns of technological evolution, the limitations of existing air defense systems, and the potential consequences of drone proliferation, this research highlights the need for adaptive, innovative approaches to counter emerging threats. The findings underscore the importance of investing in advanced detection and interception capabilities, developing comprehensive counter-drone doctrines, and fostering international cooperation to address the ethical and legal challenges posed by the military use of drones. As the competition between drone and air defense technologies continues to intensify, policymakers and military leaders must proactively engage in shaping the future of warfare to ensure national security and stability in an increasingly complex world.

• 대한임베디드공학회논문지
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• 제18권2호
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• pp.75-80
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• 2023

Unmanned drone stations for automatic charging have been developed in order to overcome the flying time limitation of rotary wing drones. Since the drone stations is an unmanned operating system, each of the drones will be required to have a high degree of landing accuracy. Drone precision landing has been mainly studied depended on image processing technologies, but the image processing systems make several problems, such as the mission weight, the drone cost, and the development complexity increases, and the flight time decrease. Thus, this paper researched accuracy of precision landing based on RTK (real time kinetics) for rotary wing drones. For the experiments of RTK based precision landing, a drone repeatedly performed three missions. The survey accuracies of the RTK about missions respectively were set as 0.3, 0.2, and 0.1 meters. Each mission has one take-off point, two way-points and one landing-point, and was repeated ten times. The experiment results revealed landing error distance means of around 0.258, 0.12 and 0.057 meters on each of RTK setting.

• Journal of Platform Technology
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• 제9권3호
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• pp.78-83
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• 2021

4차 산업혁명 기술의 융합으로 신산업 드론에 대한 연구가 증가하고 있다. 특히, 정부 정책적으로 4차 산업혁명의 대응책을 D.N.A 플랫폼으로 지정함에 따라, 해당 플랫폼을 차용한 다양한 시나리오 기반의 연구주제들이 부각되고 있다. 한편, 산업용, 연구용 드론은 관제 운항을 통한 시나리오 기반의 임무를 수행하기 때문에 시분할로 이루어진 공간적 특성을 갖추게 된다. 이에 따라서, 관제 드론 운항 시에는 기존의 보안성을 향상시키기 위한 방법을 다차원적으로 응용할 필요성이 나타났다. 이에 따라 본 연구에서는 보안성을 향상시키기 위한 시나리오 기반의 드론 플랫폼에 대한 연구를 수행하였다. 그 결과 지상 관제시스템, 드론, 드론 데이터 서버의 3분류로 공간을 분류하고 시나리오 기반의 보안기술 적용방안에 대하여 설계하였다.

• 한국산업융합학회 논문집
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• 제27권4_2호
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• pp.1009-1017
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• 2024

In this study, technology development was promoted to enable the convergence of augmented reality technology and actual drone operation technology, and its feasibility was confirmed through implementation and performance evaluation. In addition, it is believed that the AR-based drone simulator can contribute to improving drone operation capabilities by maximizing educational effectiveness and providing a realistic training environment. Based on the results of this study, we expect to improve the quality of vocational education related to drones and achieve high educational effectiveness, and it is believed that we will be able to suggest various directions in education using augmented reality.

• 한국항행학회논문지
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• 제24권6호
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• pp.458-464
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• 2020

드론은 관련 기술의 발달로 건설, 물류, 과학 연구, 촬영 등을 비롯하여 장난감까지 다양한 목적으로 보편화 되고 있다. 그러나 드론을 범죄나 테러 목적으로 사용하면서 이를 무력화 하는 Anti-drone 관련 기술의 연구, 개발도 활발히 진행되고 있는 상황이다. Anti-drone 기술의 범위는 탐지, 식별, 무력화로 구분할 수 있다. 드론을 무력화를 하는 방식은 전파 방해 등으로 탐지한 드론을 막는 소프트킬 방식이 있고, 물리적으로 파괴하는 하드킬 방식이 있다. 본 연구에서는 Anti-drone과 관련된 Google 및 Naver의 뉴스 기사를 Crawling 하였다. 국내 뉴스 기사를 분석하여 RF, GNSS, Radar 등의 기술을 찾았다. 이와 관련하여 해당 기술의 일반적인 특징과 사용 현황에 대하여 기술하였고, 각 기업 또는 기관의 Anti-drone에서의 적용 현황을 조사, 분석하였다.

• 대한임베디드공학회논문지
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• 제13권6호
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• pp.289-296
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• 2018

Drone detection in FMCW radar system needs complex techniques because a drone beat frequency is highly dynamic and unpredictable. Therefore, the current static signal processing algorithms cannot show appropriate detection accuracy. With dynamic signal fluctuation and environmental clutters, it can fail to detect a drone or make false detection. It affects to the radar system integrity and safety. Constant false alarm rate (CFAR), one of famous static signal process algorithm is effective for static environment. But for drone detection, it shows low detection accuracy. In this paper, we suggest neural network based FMCW radar system for detecting a drone. We use recurrent neural network (RNN) because it is the effective neural network for signal processing. In our FMCW radar system, one transmitter emits FMCW signal and four-way fixed receivers detect reflected drone beat frequency. The coordinate of the drone can be calculated with four receivers information by triangulation. Therefore, RNN only learns and inferences reflected drone beat frequency. It helps higher learning and detection accuracy. With several drone flight experiments, RNN shows false detection rate and detection accuracy as 21.1% and 96.4%, respectively.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2021년도 추계학술대회
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• pp.664-666
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• 2021

안티 드론은 불법적인 드론의 침입 및 활동을 감지하고 차단하는 장치를 의미하며, 불법 드론을 추락시키거나 공중에서 파괴시키는 기술을 포함하는 것으로서, 본 논문은 안티 드론 기술로 원격 드론 탐지에 따른 재밍의 영향성 분석한 것이다. 드론의 거리에 따라 재밍 신호의 영향이 달라질 수 있다. 삼각파의 발생으로 근거리에 있는 드론과 원거리에 있는 드론을 동시에 재밍을 할 수 있는 장점이 있으며, 최대 전력으로 송신하지 않음으로 배터리를 효율적으로 운용할 수 있는 효과가 있다. 또한, 원거리에서 재밍에 대한 영향을 받지 않더라도 근거리에서는 더욱 재밍 영향이 크므로 재밍에 대한 영향을 달리 받을 수 있는 장점이 있다.

• 한국항공운항학회지
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• 제26권4호
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• pp.110-115
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• 2018

This paper introduces Korea Airport Corporation's own research and development contents and plans for navigation aids check using drone which is actively research and developed mainly in advanced countries. The hardware, algorithm, operating program of the drone system, the drone flight trajectory setting, and real-time measurement results were analyzed and verified. By securing domestic technology for the latest technology utilizing drone, we plan to promote more thorough aviation safety and advanced technology in related field and commercialized it in domestic and overseas.

• 한국산업융합학회 논문집
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• 제26권6_3호
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• pp.1233-1241
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• 2023

This paper investigates the efficient application of drone LiDAR technology for acquiring precise point cloud data in construction and civil engineering. A structured workflow encompassing data acquisition, processing, and accuracy verification is introduced. Practical testing on a construction site affirms that drone LiDAR surveying yields accurate and reliable data across various applications. With a focus on accuracy and verification, the results contribute to the progression of surveying methodologies in construction and civil engineering. The findings provide valuable insights into the dynamic technological landscape of these fields, establishing a foundation for more effective and precise surveying techniques. This study underscores the transformative potential of drone LiDAR technology in shaping the future of construction and civil engineering survey practices.