모델 추종형 적응 퍼지 제어기의 설계

남문현,김낙교,손재현 건국대학교 산업기술연구원 1995 건국기술연구논문지 Vol.20 No.-

In this paper, reference-model following fuzzy controller (RMFFC) was proposed in order to overcome the difficulty of extracting rules and defects of the adaptation performance in the FLC. RMFFC comprised inner feedback loop consisting of the FLC and plant, and outer loop consisting of adaptation mechanism which of the FLC. A Referenced-model was used for design criteria of a fuzzy controller which characterizes and quantizes the control performance required in the overall control system. Tuning control rules of FLC is performed by the adaptation mechanism. For this, the fuzzy model for tuning the control rules is designed in accordance with the feature of error information. Proposed algorithm was verified through simulation for various plant models which have different characteristics. And the results are obtained as follows. 1) Control performance required by a skilled operator was reflected to the control. 2) Unnecessary rule modification did not occur in steady-state, after completion of learning, by using the following error information 3) Performance of RMFFC was improved in various disturbances, comparing with conventional FLC and MRAC.

우리나라 석탄연소 분진의 물성측정

하백현,이문수 韓陽大學校 環境科學硏究所 1986 環境科學論文集 Vol.7 No.-

대기오염 물질중 분진은 식물의 성장이나 동물의 호흡기 계통에 많은 피해를 입히는 것으로 알려져 있다. 본 연구에서는 국내의 분진을 대량 배출하는 석탄사용 업체중 6개 업체를 선정하여 Fly ash의 전기저항과 입도분포 및 화학성분, 집진가스의 온도, 수분함량, 석탄중의 황함량을 측정하고 이로부터 전기 집진기의 집진효율에 미치게 될 영향을 고려하였다. Among the air pollutants, coal combustion dust causes a considerable harms to the growth of plants and injures the animal's respiratory organs. In this study, six coal utilzing companies emitting a lot of dusts were selected. The electrical resistivities, size distributions and chemical composition of the fly ash, and gas temperature, moisture, and surface content of coal were measured for these companies. With these measured data, the factors influencing on the precipitation efficiency of the electrical precipitator were discussed.

朝鮮 初期의 時制

南文鉉 건국대학교 1993 學術誌 Vol.37 No.2

본 연구에서는 世宗 자격루에 쓰인 잣대[浮箭]를 복원하기 위하여 당시의 計時機 유물들을 조사하여 十二時 百刻制의 모델을 구성하였다. 「世宗實錄」의 報漏閣記와 「漏籌通義」의 기록에 따라 11箭의 눈금에 따른 更點의 길이를 계산하였다. 이 잣대들은 「七政算內編」에 따라 계산된 漢暘의 二至後 日出入辰刻에 의거하여 차례가 정해졌음을 알 수 있었으며 잣대간의 시간차는 二刻(곧 12분)씩이었다. '보루각기'에는 밤의 잣대 (夜箭)가 12개라고 기록되어 있고 「누주통의」에는 11개로 적혀있어 두 가지 기록이 일치되지 않았으나 「칠정산내편」에 따라 편찬된 「누주통의」의 11箭으로도 1년간을 통용할 수 있도록 하였음이 밝혀졌다. 본 연구 결과는 조선조 초기의 천체 관측기기와 자격루를 비롯한 여러 가지 계시기의 복원에 활용할 수 있으리라 생각한다. The horary systems of early period of Choseon dynasty depended 'chiljeongsan naepyeon'(七政算內編, Seven Regulators Calendar, volume 1) based on the Shou-shih calendar of Yuan Dynasty. The day was diveded in twelve 'double - hours'(十二時), each corresponding to two hours of present time and one hundred equal intervals called 'gak' (刻), each corresponding to 14 min 24 sec of modern time-reckoning. The night was divided into five equal but seasonally variable night-watches(kyeong, 更), each of which was divided into five equal portions(points, cheom, 點). In this paper 'twelve double-hours' and 'one hundred interval horary system models were reconstructed based on the 'borugakki'(報漏閣記, Record of Time Annunciating Pavillion) and 'nujutongui'(漏籌通義, Operation manual of the clepsydra for the night-watches). The eleven floating indicator-rod (浮箭) were used for the clepsydra of night-watches during a year. These rods were graduated by the sun-rise and sun-set time of Seoul after summer and winter solstices indicated to 'chiljeongsan'. The horary system models will be useful for the reconstructing astronomical instraments and several time-measarement instraments as well as automatic striking water-clock(chagyeongnu, 自擊漏) of the King Sejong(世宗 1418~1450).

자기회귀 모델을 이용한 팔운동 근전신호의 기능분리

南文鉉,金正鉉,金洛敎 建國大學校 附設 産業技術硏究所 1992 논문집 Vol.17 No.-

본 연구에서는 AR 모델을 이용한 인간의 팔운동 근전신호의 기능분리에 관한 방법을 제시하였다. 4가지 기능의 팔운동 시에 근전신호의 특성을 잘 나타낼수 있는 매개변수를 공분산범과 연속적 최소제곱 알고리즘을 이용하여 각 기능에 대한 모델의 매개변수와 적정차수를 결정하였다. 또한 팔 기능을 분류하기 위한 신뢰구간은 총합제곱오차의 평균과 표준차로 결정하였다. AR 모델의 오차를 이용하여 각 운동에 대한 기능분리를 실행한 결과 차수가 4차일 때 가장 높은 인식률을 얻을 수 있었으며, 차수가 증가할수록 인식률은 감소하였다. 따라서 본 연구의 결과는 의용생체공학이나 재활공학에 응용할 수 있으리라 기대한다. In this thesis, general method using autoregressive model in the functional separation of the myoelectric signal of human arm movements are suggested. Covariance method and sequential least squares algorithm were used to determine the model parameters and the order of signal model to describe four arm movement patterns; the forearm flexion and extension, the wrist pronation and supination. The confidence interval to classify the functions of arm movement was defined by the mean and standard deviation of total squares error. With the error signals of autoregressive(AR) model, the result showed that the highest success tate was obtained in the case of 4th order, and success rate was decreased with increase of order. This technique might be applied to biomedical-and rehabilitation-engineering.

朝鮮朝의 渾天儀 硏究

南文鉉,韓永浩,李秀雄,梁必承 건국대학교 1995 學術誌 Vol.39 No.1

Armillary spheres called honchonui is to show that during the Chosen dynasty (1392∼ 1910), Korean astronomy and technology went on its own path distinctive not only from that of the West but also from that of China, both of which had great influences on it. Our study is based upon the research of written materials and the physical investigation of some existing instruments; its findings will be used for our reconstruction of armillary spheres that were made during the middle of the dynasty. During the Choson, armillary spheres were developed to facilitate the propagation of Confucian ideology, on the one hand, to improve the knowledge of astronomy, on the other. Recognizing their importance at both aspects, the kings devoted themselves to toe making and repairing of the instruments. As time went, individuals outside of the court began to participate in making them. During the middle of the dynasty, that it from the Japanese invasion to the end of King Yongjo's rule, the Korean scientists incorporated the knowledge from the West in the making of armillary spheres. The period of King Hyonjong's reign witnessed a real innovation in making of armillary clocks. Two important scholar-officials played a major role in the renaissance of Korean technology. Upon the king's order, Yi Minch'ol cast new armillary spheres with a water-operated mechanism ; Song Iyong was also ordered to make a "self-sounding clock", that it a weight-driven armillary clock which was affected by the import of a western-style clock through China and Japan. Their joint efforts indeed led to a breakthrough not only in the history of Korean technology but also in that of mankinds. In this way, they succeeded in making armillary spheres in their own way beyond both Chinese and Western traditions of horological instrumentation. To be sure, the reconstruction of armillary spheres for which this study is to lay foundation will further stimulate the efforts at illustrating the history of Korean technology.

안구운동 제어계의 시간특성에 관한 연구

南文鉉 건국대학교 1980 學術誌 Vol.24 No.2

This study aims to investigate temporal characteristics of the human eye movement control systems, especially the saccadic systems to various visual stimuli. The eye motion transducer using infra-red photoelectric method and a target system which operates on non-predictable manner were constituted as basic measurement system. A measurement and recording systems are described for the recording and analysis of various types of saccadic eye movements (SEM) and of saccadic peak velocity (PV) associated with 10 and 20 degrees horizontal, vertical visual target. Statistical results for average peak velocities (□) of uniocular (right eye) movements are given for a group of 5 normal subjects and compared with other researchers. Most of SEM generate various corrective movements (CM) and these were categorized to saccadic and glissadic CM. It is suggested that the occurrence of corrective saccades to be dependent upon visual feedback informations. The production rate of CM to 10, 20 degrees target steps or pulses was 20% and 46% respectively. The magnitude of corrective errors were within 1-2 degrees and saccadic gain was 0.9. The saccadic peak velocity (PV) statistics showed no difference for horizontal directions and downward values were slightly faster than upward movement for vertical saccades. No significant differences are shown for horizontal and vertical movements. The velocity statistics were compared with other method and discussed the possibility of research and clinical tools that could be used on oculomotor modeling and neurological diseases.

自擊漏의 水位制御 方式에 대한 歷史的 考察

南文鉉 건국대학교 산업기술연구원 1998 건국기술연구논문지 Vol.23 No.-

The Striking Clepsydra Jagyongnu made in 1434 by King Sejong was well-known for its elaborate ball-operated time annunciating jackwork mechanisms. The details of the clepsydra is described on the Sejong Sillok(Veritable Records of King Sejong) Chapter 65. The clepsydra consists of four water-supply vessels different in sizes, two water-receiving vessels of the same size and two floating indicator-rods. At the top of each water-receiving vessels, ball-rack mechanisms are erected to generate discrete dual time-signals for annuniciating twelve double-hours and five night-watches and their five points. In this paper water-level control method for one-inflow clepsydra model is proposed for the Striking Clepsydra after re-examining the records, various literatures and the surviving parts of the New Striking Clepsydra which is the duplication of the Striking Clepsydra in 1536. The four water-suppy vessels were rearranged in the order of height; a reservoir, a compensating vessel, a constant-level tank and receptacle. This arrangement was supposed to be used for the Striking Clepeydra and water-level control technique was influenced by medieval Chinese overflow method used by Yensu and Shenkua of Sung Dynasty.

報漏閣 自擊漏 硏究(IV) : 更點機構

서문호,한영호,남문현 건국대학교 산업기술연구원 2006 건국기술연구논문지 Vol.31 No.-

The most distinctive feature of Jagyeongnoo is its simple and secure mechanisms devised for automatic audio-visual time announcing system. The Veritable Records Sejong Sillok suggested that special emphasis had been put upon signaling subdivided night-watches with mechanical logic operator. In this paper, the details of the night-watch signalling mechanism was described at full length. Through the recent reconstruction of the whole system of Jagyeongnoo which has been missing for several hundred years, the authors could discover the real ingenuity of Jang Yeong-sil displayed on the first Korean mechanical clockwork.

報漏閣 自擊漏 硏究(III) : 主時機構

한영호,서문호,남문현 건국대학교 산업기술연구원 2006 건국기술연구논문지 Vol.31 No.-

The Automatic Striking Clepsydra Jagyeongnoo installed in the Time Announcing Pavilion Borugak was the first clockwork with time announcing mechanisms in Korea. In June of 1432 King Sejong ordered Jang Yeong-sil make a timekeeping apparatus, whose wooden figurines announce time signals automatically without human intervention. On July 1, 1434 Jagyeongnoo began to function as the Royal Court standard timekeeper. Among numerous parts only clepsydra vessels have survived up to the present and nothing of the time announcing mechanisms remains nowadays. The authors of this paper had recently reconstructed the whole system of Jagyeongnoo, including the time announcing mechanisms as well. The mechanical and functional details of the time-telling apparatus were described in this paper. The characteristic aspects of Jang's ingenious devices, such as float-rod and ball-rack mechanism, ball-relay mechanism, and twelve double-hour announcing mechanism, were evaluated at the viewpoint of history of technology.

조선조 중기의 혼천의 (渾天儀) 복원 연구 : 이민철의 혼천시계 (渾天時計)

한영호,남문현 ( Young Ho Hahn,Moon Hyon Nam ) 한국과학사학회 1997 한국과학사학회지 Vol.19 No.1