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초소형 유도탄 구동날개 시스템의 플러터 예측에 관한 연구
이성헌,조영기,조한진,방효충,Lee, Seongheon,Cho, Youngki,Cho, Hanjin,Bang, Hyochoong 한국군사과학기술학회 2017 한국군사과학기술학회지 Vol.20 No.1
Miniature guided-bullet is an advanced military technology of developing guided missile which is designed to hit a target precisely while having easily carriable miniature size. A key issue of developing such system involves size reduction of the original guided missile system, and this in turn arouses stiffness issue regarding small and thin sized control surface. In this study, procedures on how to calculate the critical flutter speed of special type of control surface with the change of its dimension or material property is arranged. During this procedure, design parameters related to critical flutter speed are abridged to help preliminary design of similar structure even faster than time-consuming, and cumbersome computer analysis.
이성헌(Seongheon Lee),조한진(Hanjin Cho),조영기(Youngki Cho),방효충(Hyochoong Bang) 한국항공우주학회 2015 韓國航空宇宙學會誌 Vol.43 No.3
초소형 스마트탄은 탄도를 수정하여 손쉽게 목표물을 타격할 수 있도록 고안된 개인 휴대용 유도미사일이다. 초소형 스마트탄은 유도미사일에 준하는 기능을 수행하는데 반하여 그 크기가 일반 병사들이 쉽게 휴대할 수 있도록 축소됨으로써 아군의 전력과 생존율을 크게 높일 수 있을 것으로 기대된다. 본 논문에서는 초소형 스마트탄의 탄도수정을 위해 사용된 구동장치를 중심으로 해외에서 선행된 기술개발 사례와 특허들을 수집해 보았다. 이를 바탕으로 초소형 스마트탄의 개발을 위한 소요기술들을 분석해 보고, 추후 개념설계를 위한 초석을 마련하였다. Miniature smart-bullet is a human-carrying guided missile designed to hit a target easily while having a miniature size. Contrary to the normal missiles, miniature smart-bullet is highly expected to enhance the military strength and survival rate of troops by its compact size readily carriable to a single soldier. In this paper, previously developed techniques, activities and patents of miniature smart-bullet, particularly its structural shape and actuators are surveyed. Furthermore, analysis of required techniques to develop a miniature smart-bullet are also discussed for upcoming conceptual design.
순차적 칼만 필터를 적용한 다중센서 위치추정 알고리즘의 실험적 검증
이성헌(Seongheon Lee),김영주(Youngjoo Kim),방효충(Hyochoong Bang) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.1
Unmanned air vehicles (UAVs) are getting popular not only as a private usage for the aerial photograph but military usage for the surveillance, reconnaissance and supply missions. For an UAV to successfully achieve these kind of missions, geolocation (localization) must be implied to track an interested target or fly by reference. In this research, we adopted multi-sensor fusion (MSF) algorithm to increase the accuracy of the geolocation and verified the algorithm using two multicopter UAVs. One UAV is equipped with an optical camera, and another UAV is equipped with an optical camera and a laser range finder. Throughout the experiment, we have obtained measurements about a fixed ground target and estimated the target position by a series of coordinate transformations and sequential Kalman filter. The result showed that the MSF has better performance in estimating target location than the case of using single sensor. Moreover, the experimental result implied that multi-sensor geolocation algorithm is able to have further improvements in localization accuracy and feasibility of other complicated applications such as moving target tracking and multiple target tracking.
유상하중의 불확실성을 고려한 쿼드로터의 모델 참조 적응제어 기법 설계
이동우(Dongwoo Lee),김남수(Lamsu Kim),장광우(Kwangwoo Jang),이성헌(Seongheon Lee),방효충(Hyochoong Bang) 한국항공우주학회 2021 韓國航空宇宙學會誌 Vol.49 No.11
[원논문] 유상하중의 불확실성을 고려한 쿼드로터의 모델 참조 적응제어 기법 설계 2021, Vol. 49, No. 9, pp. 749~757 DOI : 10.5139/JKSAS.2021.49.9.749 Correction to : Model Reference Adaptive Control of a Quadrotor Considering the Uncertainty of Payload Vol. 49, No. 9, pp. 749~757 DOI : 10.5139/JKSAS.2021.49.9.749