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김인수,하훈,서원술,배주순,문희,박철웅,오은하,이소영,김명혜,kim, I.S.,Ha, H.,Seo, W.S.,Bae, J. S.,Mun, H.,Park, C.U.,Oh, E.H.,Lee, S.Y.,Kim, M.H. 한국환경보건학회 1998 한국환경보건학회지 Vol.24 No.1
This study was performed to investigate the Natural mineral water quality at 47 sites in Chonnam area, samples were collected spring, summer, fall, winter for a seasonal variation in 1996. The results obtained were summarized as follows 1. The mean of F, pH, HCO$_3$, NO$_3$ -N were 0.19 mg/l, 6. 9, 34.99 mg/l, 1.40 mg/l and those of Na, K, Ca, Mg were 12.1 mg/l, 1.2 mg/l, 7.7 mg/l, 2.1 mg/l respectively. 2. The contents of F were reasonable at Multonggol as 1.35 mg/l and Yongbayui as 0.57 mg/l respectively, but there is no detected at Sidong and detected below 0.1 mg/l at Gubongsan, Hansansa area. 3. According to the geological effect, the content of F was showed higher in granite than in tuff, and index of pH was higher in tuff than in andesite, and content of HCO$_3$ was higher in andesite than in granite. 4. The K and O values were used as index of healthy and delicious water. As a result, thirtyfive sites(74.5%) was decided as healthy and delicious water. 5. The contents of NO$_3$-N were detected over 5 mg/l at Sukchonsa, Gajanggol, Yudalsan, Muchang, Kisan.
김인수(I. S. Kim),박보용(B. Y. Park) 한국자동차공학회 1996 한국자동차공학회 학술강연초록집 Vol.1996 No.10
Due to the speed fluctuation of an engine-crankshaft rotational vibrations in driveline occur excessively and disturbances of valve timing for example can be caused as a consequence. This paper presents the analysis of speed fluctuation mechanism through simulation of model for the crankshaft system, and a method of speed fluctuation reduction attaching a tuned dynamic damper to the crankshaft, which shows the reduction of 9dB(66%) of speed fluctuation at the I. journal bearing improving the vibrational and acoustical quality of driveline.
LMI 에 기초한 연속 냉간압연기의 H^{\infty} 서보 제어기 설계
김인수,황이철,이만형,Kim, In-Soo,Hwang, I-Cheol,Lee, Man-Hyung 제어로봇시스템학회 2000 제어·로봇·시스템학회 논문지 Vol.6 No.1
In this paper, we design a H^\infty servo controller for gauge control of tandem cold mill. To improve the performance of the AGC(Aotomatic Gauge Control) system based on the Taylor linearized model of tandem cold mill, the H^\infty servo controller is designed to satisfy robust stability, disturbance attenuation and robust tracking properties. The H^\infty servo controller problem is modified as an usual H^\infty control problem, and the solvability condition of the H^\infty servo problem depends on the solvability of the modified H^\infty control problem. Since this modified problem does not satisfied standard assumptions for the H^\infty control problem, it is solved by an LMI(Linear Matrix Inequality) technique. Consequently, the comparison between the H^\infty servo controller and the existing PID/FF(FeedForward) controller shows the usefulness of this study.