패킷손실이 있는 네트워크 기반 제어시스템의 동적 출력 피드백 제어

강승은(Seung-Eun Kang),고상호(Sangho Ko) 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.4

영상센서를 탑재한 다수 멀티콥터의 협동 관측을 통한 목표물 위치 추정

강승은(Seung Eun Kang),황승준(Seung Jun Hwang),목지현(Jihyun Mok),이영호(Young Ho Lee),오형석(Hyung Suk Oh),이시훈(Si Hun Lee),백중환(Jung Hwan Baek),고상호(Sang Ho Ko) 한국항공우주학회 2016 한국항공우주학회 학술발표회 논문집 Vol.2016 No.11

모호성과 명료성의 광고 표현방법에 따른 광고와 브랜드회상 차이에 대한 연구

강승은(Kang Seung Eun),전정수(Cheon Choung Soo) 글로벌경영학회 2009 글로벌경영학회지 Vol.6 No.3

최근에 급증하고 있는 모호성 광고는 기존에 많이 사용되어온 명료성 광고에 비해 소비자의 주의를 집중시키고 정보처리의 동기를 강화시키기 때문에 효과에도 차이가 있을 것이라는 전제아래 본 연구를 실시하였다. 이에 본 연구는 모호성과 명료성의 광고표현 방법에 따른 광고와 브랜드회상 차이 및 두 가지 표현방법의 선호유형에 따른 광고와 브랜드회상 차이를 검증하는 것이 목적이다. 연구결과 모호성과 명료성의 광고표현 방법에 따라 광고회상과 브랜드회상에는 차이가 있는 것으로 나타났다. 광고회상 검증에서 모호성 광고의 글 또는 그림을 정확하게 기억하고 답변한 응답이 명료성 광고에 비해 높게 나타났으며 브랜드회상 분석에서도 명료성 광고보다 모호성 광고에서 브랜드를 더 정확하게 기억하고 있는 것으로 검증되었다. 광고 표현방법 선호에서는 명료성 광고를 선호하는 응답자가 더 많았으나 선호유형에 따른 광고회상의 차이는 보이지 않았다. 그러나 브랜드회상에서는 선호비율이 높았던 명료성 광고의 브랜드회상이 더 정확한 것으로 나타났다. 본 연구에서는 모호성, 명료성 광고의 creative수준을 고려하지 않아 일부 한계점이 존재하나, 향후 이러한 부분을 보완하여 상황과 타깃에 적합한 표현방법을 활용한다면 효과적인 광고 전략 수립에 도움이 될 수 있을 것이다. This study was conducted under the assumption that the recently growing ambiguous advertisements attract consumers attention and strengthen motivation of information processing more than the existing clear advertisements and would produce different effects. Hence, this study aimed to verify differences between advertisement and brand recall according to advertisement from methods of ambiguity and clear, differences in brand recall, and the preference type over the two expression methods. Based on the results from this study, it has been learned that there is a difference between advertisement recall and brand recall according to expression methods of ambiguity and clear. Verification of advertisement recall revealed that correct memory of answer to the texts or pictures of ambiguous advertisements was higher than those of clear advertisements. Analysis of brand recall verified that the brand was more correctly remembered with ambiguous, than clear, advertisements. In preference of advertisement expression method, there were more respondents preferring clear advertisements but there was no difference in advertisement recall based on preference types. However, brand recall was more correct with clear advertisements whose preference rate was higher. This study has not considered the level of creativeness in ambiguous and clear advertisements and there may be certain limits. If the limits are observed and expression methods more appropriate to circumstances and targets are applied, this study will be helpful to establish more effective advertisement strategies.

소형 무인항공기용 이동표적 표시기법에 대한 기술 동향 분석

윤승규(Seung Gyu Yun),강승은(Seung Eun Kang),고상호(Sang Ho Ko) 항공우주시스템공학회 2013 항공우주시스템공학회 학술대회 발표집 Vol.2013 No.5

소형 무인항공기용 영상센서 기반 이동표적표시 기법

윤승규(Seung-Gyu Yun),강승은(Seung-Eun Kang),고상호(Sangho Ko) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.12

This paper addresses a Moving Target Indication (MTI) algorithm which can be used for small Unmanned Aerial Vehicles (UAVs) equipped with image sensors. MTI is a system (or an algorithm) which detects moving objects. The principle of the MTI algorithm is to analyze the difference between successive image data. It is difficult to detect moving objects in the images recorded from dynamic cameras attached to moving platforms such as UAVs flying at low altitudes over a variety of terrain, since the acquired images have two motion components: "camera motion" and "object motion". Therefore, the motion of independent objects can be obtained after the camera motion is compensated thoroughly via proper manipulations. In this study, the camera motion effects are removed by using wiener filter-based image registration, one of the non-parametric methods. In addition, an image pyramid structure is adopted to reduce the computational complexity for UAVs. We demonstrate the effectiveness of our method with experimental results on outdoor video sequences.

소형 무인항공기용 이동표적 표시기법에 대한 기술 동향 분석

윤승규(Seung Gyu Yun),강승은(Seung Eun Kang),고상호(Sang Ho Ko) 한국항공우주학회 2014 韓國航空宇宙學會誌 Vol.42 No.7

본 논문에서는 소형무인항공기용 이동표적 표시기법(MTI, Moving Target Indication)에 대한 기술 동향분석을 하였다. MTI는 크게 이미지 정렬과 차영상 오류보정 단계로 구성되는데 이중 이미지 정렬 기법에는 매개변수방식과 비매개변수방식이 있으며 본 논문에서는 매개변수방식을 사용한 이용한 MTI에 초점을 맞췄다. 소형무인항공기의 경우, 저고도 운용에 의한 시차문제가 발생하는데 이를 보정하기 위해서 등극기하학이 사용된다. MTI의 성능을 향상시키기 위한 관련기법들도 살펴보았으며 향후 발전방향을 제시하였다. In this paper, we survey the Moving Target Indication(MTI) techniques for small UAVs. MTI consists of image alignment phase and frame differencing correction phase, and image alignment has two ways of parametric approach which is mainly focused in this paper and non-parametric approach. Since small UAVs are operated in the low altitude, the parallax is considerable and the epipolar geometry is applied to compensate the parallax. The related works and future works are presented.

원예시설 농가의 위험지각이 보험 구매의도에 미치는 영향 - 제주도를 중심으로 -

이호승(Ho-Seung Lee),강승은(Seung-Eun Kang) 한국콘텐츠학회 2021 한국콘텐츠학회논문지 Vol.21 No.11

원예시설 농가들은 시설에서 발생할 수 있는 위험에 대비하여 농작물재해보험 원예시설 담보의 보험상품을 가입한다. 상품이 담보하는 태풍, 우박, 동상해, 호우, 강풍피해 등의 자연재해에 대비하기 위하여 보험에 가입하는 것이다. 농가들이 위와 같은 자연재해 등으로 부터 인지할 수 있는, 즉 주어진 상황의 위험성에 대한 주관적인 지각인 위험지각이 원예시설 농가로 하여금 원예시설 보험상품 구매의도에 미치는 영향을 알아보고자 제주지역의 원예시설 농가 소유주를 대상으로 위험지각과 보험구매의도에 대해 분석하였다. 농장규모, 보험가입 여부와 위험지각의 영향관계 규명을 위해 t-test를 시행하였고 주관적 인식, 준거집단, 미디어 노출, 보상이해도 등 개인적 특성과 행동요인이 위험인식에 미치는 영향을 검증하기 위해 다중회귀분석을 하였다. 그리고 위험지각과 보험구매의도의 영향관계에서 개인적 특성 및 행동요인의 매개역할을 확인하기 위해 Baron & Kenny의 3단계 회귀분석을 실시하였다. 연구결과 농장규모에 따른 차이는 없으나 보험가입자가 미가입자에 비해 위험지각 정도가 더 높은 것으로 분석되었고 보상이해도가 가장 큰 영향력을 가지며 주관적 지식의 영향력이 가장 작은 것으로 확인되었다. 또한 이 네 가지 요인은 위험지각과 보험구매의도의 영향관계에 매개효과를 갖는 것으로 검증되었다. 이러한 결과는 원예시설 보험상품 개발과 마케팅 활동에 실무적인 도움을 제공할 수 있을 것으로 기대된다. Horticultural facility farmers subscribe to crop accident insurance and insurance products secured by horticultural facilities in preparation for possible risks in the facility. Insurance is purchased to prepare for natural disasters such as typhoons, hail, frostbite, heavy rain, and strong wind damage covered by the product. In order to find out the effect of risk perception, which is a subjective perception of the risks of a given situation, on horticultural facility farmers intention to purchase horticultural facility insurance products, the risk perception and insurance purchase intention were analyzed. A t-test was conducted to determine the impact relationship between farm size, insurance coverage, and risk perception, and multiple regression analysis was conducted to verify the effect of personal characteristics and behavioral factors such as subjective perception, reference group, media exposure, and compensation understanding. In addition, a three-step regression analysis by Baron & Kenny was conducted to confirm the mediating role of personal characteristics and behavioral factors in the relationship between risk perception and insurance purchase intention. As a result of the study, although there was no difference in farm size, it was analyzed that policy holders had a higher degree of risk perception than non-subscribers, and that compensation understanding had the greatest influence and subjective knowledge had the smallest influence. In addition, these four factors were verified to have a mediating effect on the relationship between risk perception and insurance purchase intention. These results are expected to provide practical help to the development and marketing activities of horticultural facility insurance products.

Dubins 곡선을 이용한 항공기 3자유도 질점 모델의 3차원 경로계획 및 유도

오수헌,하철수,강승은,목지현,고상호,이용원,O, Su-Hun,Ha, Chul-Su,Kang, Seung-Eun,Mok, Ji-hyun,Ko, Sangho,Lee, Yong-Won 한국항공운항학회 2016 한국항공운항학회지 Vol.24 No.1

In this paper, we integrate three degree of freedom(3DOF) point-mass model for aircraft and three-dimensional path generation algorithms using dubins curve and nonlinear path tracking law. Through this integration, we apply the path generation algorithm to the path planning, and verify tracking performance and feasibility of using the aircraft 3DOF point-mass model for air traffic management. The accuracy of modeling 6DOF aircraft is more accurate than that of 3DOF model, but the complexity of the calculation would be raised, in turn the rate of computation is more likely to be slow due to the increase of degree of freedom. These obstacles make the 6DOF model difficult to be applied to simulation requiring real-time path planning. Therefore, the 3DOF point-mass model is also sufficient for simulation, and real-time path planning is possible because complexity can be reduced, compared to those of the 6DOF. Dubins curve used for generating the optimal path has advantage of being directly available to apply path planning. However, we use the algorithm which extends 2D path to 3D path since dubins curve handles the two dimensional path problems. Control law for the path tracking uses the nonlinear path tracking laws. Then we present these concomitant simulation results.

GNSS 대안항법시스템 요구사항 및 기술 분석

조상훈 ( Sang Hoon Jo ),강승은 ( Seung Eun Kang ),강자영 ( Ja Young Kang ),고상호 ( Sang Ho Ko ) 한국항공운항학회 2012 한국항공운항학회지 Vol.20 No.3

The recent transition to Performance Based Navigation in aviation enhances the accuracy of aircraft position, safety and efficiency in air traffic operations by using satellite-based navigation system such as GNSS. However, intentional interferences with GNSS signal as well as ones coming from natural phenomena such as solar storm increase. GNSS have very low power and therefore their signals are more susceptible to interferences than ground-based navigation signals. This paper introduces requirements of alternative positioning, navigation and timing(APNT) system and relevant technologies when the GNSS signals are not valid.

Fly-By-Wireless 비행제어 기술의 연구 동향

한정수,하철수,오수헌,강승은,고상호,Han, Jung-Soo,Ha, Chul-Su,O, Su-Hun,Kang, Seung-Eun,Ko, Sangho 한국항공운항학회 2014 한국항공운항학회지 Vol.22 No.1

This paper deals with recent research cases and directions of Fly-By-Wireless (FBWLS) flight control technology. FBWLS is a new type of flight control system technology with the aim of solving the problems mainly caused by the increasing amount of wires in aircraft to which Fly-By-Wire (FBW) technology applies. Therefore, in FBWLS flight control system the wired communication system is replaced with a wireless communication system. Currently the FBWLS flight control technology is at an initial development stage and thus this paper surveys deals with the cases in the viewpoint of technology feasibility. In this context, this paper analyzes technology that needs further studies to secure the reliability, stability and accuracy to the similar level of the corresponding FBW system. Since the major problems of FBWLS technology are packet losses and time delays so that this paper suggests the research direction of wireless communication protocol selection, optimization of wireless communication network and controller design considered communication environment.