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범용 MPU의 PWM 출력을 이용한 PLC 원호보간 기능 구현
이상백(Sang-beak Lee),한경식(Kyoung-sik Han) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
이 논문은 PLC 내장 위치결정 기능의 원호보간 기능 구현에 대하여 설명한다. 원호보간 알고리듬은 많은 사람들에 의해 연구되었지만 본 논문에서는 기존에 발표된 비교적 간단한 알고리듬을 창조하여 범용 MPU를 활용한 펄스 제어방법을 소개한다. 특히 원호보간 시 정해진 궤적을 벗어나지 않기 위해서 1㎳ 단위로 새로운 위치 값을 연산하여 운전하는 방식을 채용하였다.
이상백(Sang Beak Lee),최영희(Young Hee Choi),함석종(Suk Jong Ham) 한국관광연구학회 2012 관광연구저널 Vol.26 No.6
This study is aimed to research the hot-spring destination image of Sokcho city which is rich in tourism resources that are natural and cultural ones, and to utilize the analyzed results as a reference for activating the tourism of Sokcho city. To measure the influence which tourism destination images affect to the customer satisfaction and visiting intention, Sokcho`s hot-spring tourism destination images are divided into specific cognitive images and emotional images based on previous studies, and also prepare the questionnaires for measuring the Sokcho`s hot-spring tourism destination images. As a result, the Sokcho`s hot-spring tourism destination images influenced(plus direction) to tourist satisfaction and the emotional images more strongly influenced to tourist satisfaction than the cognitive images did. As it analyzed that excellence in tourist service among the cognitive images and excellence in facilities among the emotional images are not fit the full model, it is necessary that Sokcho city improve and enlarge excellence in tourist service and excellence in facilities to be a good hot-spring destination. And it is also analyzed that degree of satisfaction and behavioral intentions are proportional to tourism value. It means that the city needs continuous tourism marketing activities like “an image building and facility investment of hot-spring destination.
RANSAC 알고리듬을 이용한 PID 자동동조 성능 개선
박강희(Kang-hee Park),이상백(Sang-beak Lee),한경식(Kyoung-sik Han) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
The objective of this paper is to present a robust and con-sistent parameter estimation method for PID controller which use PRC tuning method. Here, to improve consistency of gradient and intercept point estimation. all sampled step response data are pre-sampled with RANSAC(RAndom Sample And Consensus) algorithm before they are adapted to least square method which is used for line fitting on PRC method. The consistency of proposed method are provided by repeated simulation result(Lower standard deviation of gradient and interception) and shows the efficiency of proposed method, and this proposed method is useful for simple microprocessor based controller for industrial machine which is placed in an poor noisy environment.
전기적 방출 조절 시스템을 이용한 광 페록사이드센서의 개발
민준홍,임인희,김효한,이상백,최정우,이원홍 ( Jun Hong Min,In Hee Lim,Hyo Han Kim,Sang Beak Lee,Jeong Woo Choi,Won Hong Lee ) 한국센서학회 1997 센서학회지 Vol.6 No.1
The optical biosensor using the electrically controlled release of reactive reagent is developed for the detection of peroxide. Rapid degradation of polymer complex of PEOx and PMAA occurs as the applied current increases and thus released amount of HPA increases. The degradation velocity of polymer and the amount of HPA released are linearly proportional to the applied current. Peroxide is reacted with the released reagent by peroxidase and then the product, a fluorescent dimer DBDA, is formed. The monochromic light from light source (150W Xe arc ramp) excites the DBDA and the excited light is transmitted through an optical fiber to be detected by a photodiode array. The change of fluorescence intensity is related to the change of peroxide concentration. The peroxidase is entrapped in Ca-alginate gel on the inner surface. The biosensor has the linear signal range of 0.025mM-l0.mM peroxide. By applying the step function of peroxide, reproducibility of biosensor has been investigated. The mathematical model is constructed by the combination of enzyme kinetics with reactor flow model. Good agreement is obtained between the experimental result and model prediction in the sensor signal.