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Jotje Rantung,Jong Min Oh(오종민),Hak Kyeong Kim(김학경),Sea June Oh(오세준),Sang Bong Kim(김상봉) 제어로봇시스템학회 2018 제어·로봇·시스템학회 논문지 Vol.24 No.2
This paper proposes the real-time image segmentation and determination of 3D coordinates for fish surface area and volume measurements based on stereo vision. The segmentation process is performed in real-time on the video frame. Complexity and computation time are reduced by segmenting hue and value feature spaces separately before combining result. Morphological erosion and morphological dilation are applied to remove any object pixels that are clustered as background pixels. Finally, image segmentation is obtained in the binary image of an object. A step-by-step approach to computing a binary image is applied to obtain segmentation image. The object is considered a fish on a platform with a known background color, a known geometric shape for the fish, and the stereo camera is in fixed position to capture an image. The objective of this paper is to obtain a simple but accurate 3D image that is capable of capturing the 3D coordinates values of the fish object. The followings are done for this task: First, the stereo camera is calibrated to collect its intrinsic parameters and distortion parameters correctly. Second, an image is captured by the camera, that is segmented in real-time to distinguish between the object’s destination and its surroundings. Finally, the object coordinates, surface area, and volume of the fish are measured. Experiment results show that the proposed method has good results in real-time segmentation, and shows different surface areas and volumes within about 6% and 5.3%, respectively.
RCGA 기법을 이용한 컨테이너 크레인의 T-S 퍼지 모델링
이윤형(Yun-Hyung Lee),소명옥(Myung-Ok So),진강규(Gang-Gyoo Jin),유희한(Heui-Han Yoo),오세준(Sea-June Oh) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
In this paper, we present Takagi-Sugeno fuzzy model for container crane. This is characterized by fuzzy if-then rules which represent the locally input-output relationship whose consequence part is described by a state space equation as subsystem of a container crane. The parameters of the premise part of the Takagi-Sugeno fuzzy model are adjusted by a RCGA to have same dynamic characteristics with nonlinear system of a container crane. Simulation example is given to illustrate the performance of T-S fuzzy model.
RCGA 기법을 이용한 컨테이너 크레인의 T-S 퍼지 모델링
이윤형(Yun-Hyung Lee),유희한(Heui-Han Yoo),정병건(Byung-Gun Jung),소명옥(Myung-Ok So),진강규(Gang-Gyoo Jin),오세준(Sea-June Oh) 한국항해항만학회 2007 한국항해항만학회지 Vol.31 No.8
비선형성이 강한 컨테이너 크레인은 작업 시에 호이스트 와이어로프의 길이와 화물의 질량 변화로 인해 더욱 복잡한 동역학적 특성을 나타낸다. 이 같은 복잡한 비선형시스템을 다루기 위해 퍼지로직이 종종 사용되는데, 특히 각 퍼지 규칙의 결론부를 상태 방정식으로 표현하는 T-S 퍼지모델이 대표적인 방법이다. 본 논문에서는 T-S 퍼지모델을 이용하여 호이스트 와이어로프의 길이나, 화물의 질량이 변화하는 환경에서도 컨테이너 크레인의 동특성을 표현할 수 있는 퍼지모델을 얻는 방법을 제안한다. 이때, 퍼지모델의 소속함수 파라미터는 RCGA가 결합된 모델조정기법을 통해 최적으로 조정된다. 이렇게 구현한 퍼지모델과 컨테이너 크레인 비선형시스템의 개루프 응답을 비교하여 그 유효성을 확인한다. In this paper, we focuses on the development of Takagi-Sugeno (T-S) fuzzy modeling in a nonlinear container crane system. A T-S fuzzy model is characterized by fuzzy if-then rules which represent the locally input-output relationship whose consequence part is described by a state space equation as subsystem. The T-S fuzzy model in container cranes first obtains a few number of linear models according to operation conditions and blends these conditions using fuzzy membership functions. Parameters of the membership functions are adjusted by a RCGA to have same dynamic characteristics with nonlinear system of a container crane. Simulations are given to illustrate the performance of T-S fuzzy model.
해석 프로그램을 이용한 72W급 LED 등기구의 광분석과 열해석
고제현(Je-Hyun Ko),박재현(Jae-hyoun Park),김현종(Hyun-jong Kim),김현지(Hyun-ji Kim),김정환(Jung-hwan Kim),김범석(Bum-suk Kim),김정렬(Jeong-ryul Kim),오세준(Sea-June Oh),김진구(Jin-Gu Kim) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.11
In recently, LED light device is used for various purposes according to the efficiency and performance of the respective accessories. Among the LED light devices using in marine are satisfied with the inadequate condition of circumstances more than that of land. For example, the tests of sea water, electromagnetic wave and explosion proof should be taken. So this study deal with the basic analysis of heat and optic on the LED light device to satisfy the KS standard.