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- 저자 : 이희섭(H.S. Lee) (검색결과 13 건)
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PEM 연료전지 분리판용 흑연입자 복합재의 성형성 평가
이희섭(H. S. Lee),김성근(S. G. Kim),김형중(H. J. Kim),안성훈(S. H. Ahn) 한국정밀공학회 2006 한국정밀공학회 학술발표대회 논문집 Vol.2006 No.5월
The bipolar plate is a major component of the PEM fuel cell stack, which takes a large portion of stack cost. In this study, as alternative materials for bipolar plate of PEM fuel cells, graphite composites were fabricated by compression molding. Graphite particles mixed with epoxy resin were used as the main substance to provide electric conductivity. Flow channels were fabricated by compression molding, and design of experiments (DOE) was applied to the tests to evaluate moldability. Results showed that land width and channel depth were two significant factors for moldability, and channel width had little influence on the moldability.
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이동형 로보트의 속도 및 방향제어를 위한 퍼지-신경제어기 설계
한성현(S.H. Han),이희섭(H.S. Lee) Korean Society for Precision Engineering 1996 한국정밀공학회지 Vol.13 No.4
In this paper, we propose a new fuzzy-neural network control scheme for the speed and azimuth control of a mobile robot. The proposed control scheme uses a gaussian function as a unit function in the fuzzy-neural network, and back propagation algorithm to train the fuzzy-neural network controller in the framework of the specialized learning architecture. It is proposed a learning controller consisting of two fuzzy-neural networks based on independent reasoning and a connection net with fixed weights to simply the fuzzy-neural network. The effectiveness of the proposed controller is illustrated by performing the computer simulation for a circular trajectory tracking of a mobile robot driven by two independent wheels.
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