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고명준,Ko, Myoungjun 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.2
In this paper, we studied a method of wirelessly checking up the POD for captive flight tests which is performed during the development of guided weapons systems. The wireless power transfer module, the power distribution device, and the battery pack were designed to wirelessly power the captive flight test POD, and the communication device was designed to enable wireless communication between the POD and the check-up device. The communication device was designed to enable WiFi, IR communication, and laser diode communication, so that various communication methods could be tested. Through the performance test, it was confirmed that power was stably supplied to the captive flight test POD, and the wireless communication performance was verified by measuring the delay time and error rate. As a result, by using our system the POD check-up for the captive flight test was performed wirelessly and the data of the captive equipment could be obtained effectively.
고명준,이영학,김민숙,박종일,김희철,Ko, Myung Joon,Lee, Young Hak,Kim, Min Sook,Park, Jong Yil,Kim, Heecheul 한국전산구조공학회 2015 한국전산구조공학회논문집 Vol.28 No.6
본 논문은 유공형 판 형태로 전단보강한 넓은 보의 전단파괴 실험을 수행하여 넓은 보의 거동을 평가하였다. 무보강 시험체, 유공형 강판으로 전단보강된 시험체 5개와 유공형 GFRP로 보강된 시험체 5개 총 11개의 시험체를 전단파괴 실험을 통해 계측한 전단강도와 ACI-318 규준의 설계식을 통해 얻은 전단강도와 비교 평가하였다. 또한 넓은 보의 전단보강재의 재료, 종방향 전단보강재의 간격과 횡방향 전단보강재의 간격을 변수로 하여 넓은 보의 거동과 전단강도에 미치는 영향을 분석하였다. 이를 통해 종방향과 횡방향 전단보강재 간격이 줄어들수록 전단강도가 증가하고 사인장 균열이 적게 발생하는 것을 확인하였다. 또한 전단보강재의 재료인 강재와 GFRP에 상관없이 전단보강량이 동일하다면 넓은 보에서 비슷한 전단보강효과를 보이는 것을 확인하였다. In this paper, shear behavior of concrete wide beam reinforced with plates with openings was evaluated. For this evaluation, evelen specimens were manufactured. One specimen was non-shear reinforced, five specimens were reinforced with steel plates and the other five specimens were reinforced GFRP plates. Shear strengths measured through experiments were compared with ones calculated from the equation provided by ACI 318. Longitudinal spacing of shear reinforcement, transverse spacing of shear reinforcement and shear reinforcement material were considered as variables. Test results showed that the shear strength increased as the transverse and longitudinal spacing of shear reinforcement became narrow. Also, regardless of material type of shear reinforcement, the shear capacity was similar when the amount of shear reinforcement was the same.
고명준(Myung-Jun Ko),Vlad Patrangenaru,홍성욱(Seong-Wook Hong) Korean Society for Precision Engineering 2006 한국정밀공학회지 Vol.23 No.4
This paper presents surface matching algorithms that can be used to reconstruct the surface topography of an object scanned by an AFM. The essence of the algorithms is to match up neighboring images intentionally overlapped with others. Two performance indexes using the correlation coefficient and the sum of the squared differences are introduced. To compensate for the inaccuracy of the coarse stage implemented to AFM, all the six axes including the rotational degrees of freedom are successively matched so as to maximize the coefficients defined. The results show that the proposed algorithms are useful for measurement range extension of AFM. The results also show that a combined use of the two indexes is beneficial for practical cases.
고명준(Myung-Jun Ko),V. Patrangenaru(Vlad Patrangenaru),홍성욱(Seong-Wook Hong),이득우(Deug-Woo Lee) 한국생산제조학회 2005 한국생산제조시스템학회 학술발표대회 논문집 Vol.2005 No.10
This paper introduces a couple of surface matching algorithms that can be used to reconstruct the surface topography of an object scanned of by an AFM. These image matching techniques are applied to two neighboring images intentionally overlapped with each other. To enhance the performance, this paper compare two algorithms using the correlation coefficient and the sum of the squared differences. To compensate for the inaccuracy of the coarse stage implemented to AFM, all the six axes including the rotational degrees of freedom are successively matched to maximize the coefficient defined. The results show that the proposed algorithms are useful for measurement range extension of AFM. The results also show that a combined use of the two indices is beneficial for practical cases.
원자간력 현미경의 측정면적 확대를 위한 영상정합 알고리즘 개발
고명준(M. J. Ko),V. Patrangenaru,홍성욱(S. W. Hong) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
This paper introduces a correlation-based surface matching algorithm that can be used to reconstruct the surface topography of an object that is scanned from multiple overlapping regions by an AFM. The image matching technique is applied to two neighboring images intentionally overlapped with each other. To account for the inaccuracy of the coarse stage implemented in AFM, all the six axes including the rotational degrees of freedom are successively matched to maximize the correlation coefficient. The results show that the proposed 6-axes image matching method is useful for expanding the measurement range of AFM.
고명준(Myung-Jun Ko),V. Patrangenaru(Vlad Patrangenaru),홍성욱(Seong-Wook Hong),이득우(Deug-Woo Lee) 한국생산제조학회 2005 한국공작기계학회 추계학술대회논문집 Vol.2005 No.-
This paper introduces a couple of surface matching algorithms that can be used to reconstruct the surface topography of an object scanned of by an AFM. These image matching techniques are applied to two neighboring images intentionally overlapped with each other. To enhance the performance, this paper compare two algorithms using the correlation coefficient and the sum of the squared differences. To compensate for the inaccuracy of the coarse stage implemented to AFM, all the six axes including the rotational degrees of freedom are successively matched to maximize the coefficient defined. The results show that the proposed algorithms are useful for measurement range extension of AFM. The results also show that a combined use of the two indices is beneficial for practical cases.
조립성 분석을 위한 3D CAD 모델 기반 DFA 시스템
고명준(Myoung Jun Ko),임종완(Jong Wan Lim),이전일(Li Quan Ri),황다혜(Da Hye Hwang),조재탁(Jae Tak Cho),손권(Son Kown),노상도(Sang Do No),권혁진(Hyeok Jin Kwon),이주연(Ju Yeon Lee),김보현(Bo Hyun Kim) (사)한국CDE학회 2016 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2016 No.동계
Currently, many companies are endeavoring in reflecting various demands on their products. By needs for mass-customization, which means low production volume and high varieties in products, have been increased and this led to increase in cost of production. Design for Assembly (DFA) is a methodology which applies concurrent engineering concept to enable reduction in time & cost for product assembly and improvement in assemblability at product design stage. Most of existing DFA tools are implementing checklist system based on surveys on data gathered from users’ experiences at product design stage, and are assessing design under guidelines and calculating DFA indices and Efficiency. However, such methodology increases workloads, difficulties in application to 3D models and difficulties of users who are not familiar with it in understanding and utilizing. Therefore, 3D model-based DFA system, which is applicable to confirmation of assemblability for reflection onto the product design, is designed and implemented. This 3D CAD-based DFA system is expected to decrease workload and help those users who are not proficient assess assemblability more easily at the stage of product design.