반송용 선형 유도 전동기의 급속 제동특성에 관한 연구

우정인,조윤현,노태균,신동률,이채동 東亞大學校 1996 東亞論叢 Vol.33 No.-

The SLIM used in the conveyance system has been generally developed the controller based on the slip frequency control and the VVVF method to obtain the quirk response for the position control signal. This paper deals with the trust control of the SLIM by vector control with Bang-Bang condition. Also, the control system is composed of the Pl controller for soft start of the SLIM and the q-axis current controller for correction in phase with Space Vector for reducing the harmonic pulsation in low speed. The processing for vector control and robust dynamic breaking control is carried out by MC80196KC micro processor and IGBT module. The proposed scheme is verified through the computer simulation and experiments for the 10KW SLIM.

공간벡터변조에 의한 반송용 편측식 선형유도전동기의 센서리스 속도제어

우정인,노태균,신동률,고성현 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

Space Vector control of linear induction motor without speed sensor is one of the most up-to-date researching subjects to the engineers in the fields of power electronics and control theory. A conveyance SLIM(Single-sided Linear Induction Motor) has required a stable speed and a soft start/atop when the goods convey. So, the close loop control method to use a speed sensor have been adopted and as the speed sensor, a linear encorder has been used. But when the speed sensor used, the application boundary is limited and the confidence of system is diminished because it is sensitive to external environment variations and its cost is very expensive. So to solve these problems, this paper deals with speed control of the conveyance SLIM using space vector without speed sensorless.

반송용 편측식 선형기기의 추력제어에 의한 특성해석

우정인,신동률,조용길,노태균 東亞大學校 大學院 1999 大學院論文集 Vol.24 No.-

본 논문에서는 PWM 인버터 구동 편측식 선형유도 전동기(이하 SLIM)의 공간백터 제어와 PI 제어를 통한 추력 제어를 행한다. 1차측 권선과 SLIM의 2차측 구조 사이에서 발생하는 공극길이의 떨림은 빠른 응답특성을 얻기위해서 최소화 되어야 한다. 먼저, SLIM의 전압방정식이 추력과 수직력 특성을 해석하기 위하여 d-q축 등가회로로서 나타내어진다. 또한, d-q축 등가회로의 모델링과 해석은 등가회로상에서 전류변동에 따른 강인한 과도 추력특성을 얻을 수 있다. 지령속도와 추력에 의한 SLIM의 직접구동 결과는 실험을 통해서 확인된다.

교류여자방식 브러시리스 동기전동기의 공간벡터에 의한 토오크제어

우정인,정영일,노태균,조용길,신동률 東亞大學校 附設 情報通信硏究所 1997 情報通信硏究所論文誌 Vol.5 No.1

In the paper, a vector control method for a AC-excited BLSM(Brushless Synchronous Motor) is proposed. The BLSM has a feature that separate exciter is not needed for excitation. The proposed method is described in two parts as follow, one is the design of drive and the other is a modeling for its imlpementation. Rotor flux is estimated using inditect sensing method based on voltage equation in the synchronously rotation reference frame. And rotor position os calculated from rotor angular velocity and stator current. Through computer simulation results of this prorosed system, it is shown that the BLSM drive has a ability of precision torque control from the static and dynamic performances.

유자 중 limonoid 화합물의 정량 및 분리정제에 관한 연구

우강용,하정욱,우동균 慶南大學校 附設 工業技術硏究所 1997 硏究論文集 Vol.15 No.1

남해안에서 생산되는 유자의 씨와 과피중의 limonoid 함량을 HPLC (Spectra Physics 8800, U.S.A)에 의하여 분석 정량해 보았다. Limonoid 화합물 중 limonin과 nomilin은 methanol과 acetone에 의해 비교적 추출이 용이하였으며, acetone과 acetonitrile에 의해서 naringin이 거의 추출되지 않았으나 methanol에 의해서는 상당히 많은 양이 추출되었다. 유자씨에는 107.4mg%의 limonin과 85.39mg%의 nomilin이 함유되어 있으나, 유자 과피중에는 0.05mg%의 limonin과 0.034mg%의 nomilin이 함유되어 있었다. Amberite XAD-2 칼럼상에서 naringin 이 초기에 용출된 다음 100∼150㎖ 사이에서 limonin이 그리고 200∼250㎖ 사이에서 nomilin이 각가 최대의 용출율을 나타냄으로서 limonin과 nomilin의 분리정제 가능성이 확인되었다. Seeds and sarcocarp of citron from the southern part of Korean peninsula were analyzed for limonoid content by HPLC (Spectra Physics 8800, U.S.A) with the Nova-pak C18 column. Limonin and nomilin were well extracted by methanol and acetone, respectively, and little naringin was extracted by acetone or acetonitrile, but extracted in great quantity by methanol. Citron seeds contained 107.4 mg% of limonin and 85.39 mg% fo nomilin, and citron sarcocarp had 50 ppm of limonin and 34 ppm of nomilin. On the Amberite XAD-2 column naringin was elured at first, and then limonin and nomilin were eluted between 100㎖ and 150㎖, and between 200㎖ and 250㎖, respectively.

컴퓨터에서 쉽게 즐길 수 있는 비행 슈팅게임의 설계

강상우, 김지윤, 안성옥, 김수균, 박동원 배재대학교 공학연구소 2014 공학논문집 Vol.16 No.1

슈팅 게임(Shoting game)은 액션게임에 속해 있는 장르중 하나로 총 또는 미사일 같은 원거리 무기를 사용해 공격과 적의 공격을 피하는 게임이며[1]‘비행슈팅(Aircraft Shooting)’은 비행기를 조작해서 싸우는 게임이다[2]. 비행슈팅게임은 누구나 게임에 대해 쉽게 이해하고, 쉽게 즐길 수 있기 때문에 다른 장르의 게임들에 비해 대중화 되어 있다. 본 게임은 컴퓨터에서 쉽게 즐길 수 있도록 설계된 게임으로 우주를 배경으로 제작된 게임이며, 수많은 운석과 기뢰들을 피하고, 게임 중반부에 나오는 해적선을 파괴하고 목적지까지 도달하는 것이 게임의 목표이다. 본 게임은 Unity3D를 이용하였고, Unity3D엔진은 다른 플랫폼과의 호완성이 좋고 자체 내에서 지원해주는 기능들이 많기 때문에 많은 개발자들이 사용하고 있다.

항염증성약물의 치태추출액에 대한 중성호성백혈구의 화학주성 억제효과에 관한 시험관적 연구

우진오,정동균 대한구강생물학회 1980 International Journal of Oral Biology Vol.4 No.1

Inhibition of in vitro neutrophil chemotaxis to the dental plaque extract by a few anti-inflammatory agents was studied in this experiment. For this experiment, the Boyden chamber modified by the author was used. The drugs tested in this experiment were the steroidal anti-inflammatory agent, hydrocortisone succinate, and the non-steroidal anti-inflammatory agents, phenylbutazone and acetylsalicylic acid. The results were as follows ; 1. The neutrophil chemotactic responsiveness to the dental plaque extract diluted 1/1,000 was remarkable. 2. Both steroidal anti-inflammatory agent and nonsteroidal anti-inflammatory agents inhibited the chemotactic responsiveness of neutrophils obtained from the rabbit peritoneal exudates to the dental plaque extract.

새로운 Fluorene계 발광 고분자 합성

李愚鵬,吳東元,朴美淑,黃悳海,宋智怜,朴在均 慶北大學校 科學敎育硏究所 2004 科學敎育硏究誌 Vol.28 No.-

Poly [2,7-(9,9-di-n-hexyl-fluorene-co-9,9-dibenzylidenylflourene)-2,7diyl] was synthesized through nikel-catalyzed coupling between 9,9-disubstituted 2,7-dibromofluorene and new fluorene-based monomer, 9,9-dibenzylidenylflurene in good yield. The polymer containing new fluorene monomer, 2,7-dibromo-9,9-dibenzylidenyflu -orene, which not only has extended π conjugation, but also has sterically hinderd sudstituents at the 9-position. The polymer obtained is found to be soluble in conventional organic solvents such as chloroform and was characterized by GPC, ^(1)H NMR and ^(13)C NMR. Also the UV absorption band showed the peak of maximum absorption at 373 nm and the photoluminescence (PL) spectra emission band showed the peak at 558 nm yellowish green region.

난소적출 및 수종 Hormone투여가 치아및 치은의 Collagen 생합성에 미치는 영향에 관한 실험적 연구

박우찬,정동균 대한구강생물학회 1980 International Journal of Oral Biology Vol.4 No.1

The effects of ovariectomy, several hormones and fluoride on the collagen turnover in teeth, pulp and gingiva were studied employing the Sprague-Dawley female rats. The rats were divided into non-treated and treated group, and treated group on which had been performed ovariectomy operation, was further subdivided into 5 groups, i.e., control, estrogen, testosterone, prednisolone and fluoride administered group. Then, each group was treated with ^3H-proline and sacrificed according to a predetermined schedule. Pulp, teeth and gingiva were removed immediately and decalcified for 3 days. After digestion of samples, separation and quantitative analysis of proline and hydroxyproline were performed employing thin layer chromatography and radioactivity of seperated amino acid was assayed by liquid scintillation counter. The results were as follows ; 1. In non-treated group, the incorporation rate of ^3H-proline into hydroxy-proline was greater in pulp of teeth than in hard tissue of teeth and gingiva. Collagen turnover of lower root, lower pulp and gingiva was more rapid than any other tissues tested. 2. In all the tissues from ovariectomized rats, the incorporation of ^3H-proline into collagen was markedly decreased. 3. The decreased effect of ^3H-proline incorporation into collagen by ovariectomy was markedly antagonized with estrogen, moderately or slightly with testosterone in all the tissues tested, whereas fluoride had a slightly antagonizing effect only in th lower incisor roots. The effect of ovariectomy on collagen turnover was augmented or not influenced by prednisolone.

벼에 대한 돈분뇨 혐기성 소화액비의 시용기준 연구

임동규,박우균,권순익,남재작,박백균,김승환 한국환경농학회 2002 한국환경농학회지 Vol.21 No.4

가축분뇨물 혐기소화하여 메탄가스를 생산하고 난 다음 혐기성 소화액비를 비료자원으로 활용하기 위하여 농가포장에서 액비의 시용기준을 구명하였다. 벼 생육상황은 분얼기 및 출수기에 액비 70%+화학비료 30% 및 액비 100%구의 경수만 타 처리구보다 약간 많았다. 시기별 식물체 중 절진소함량은 표준시비구가 생육초기에 기비 및 분얼비의 영향으로 타 처리구보다 높았다. 벼 수량은 액비 70%+화학비료 30% 및 액비 100%구가 표주시비구보다 약간 증수되었으나, 액비 50%+화학비료 50%구는 표준시비구보다 약간 낮았다. 수확기 질소흡수량, 시비질소 효율 및 시비질소 이용율은 수량이 많았던 액비 70%+화학비료 30% 및 액비 100%구에서 높았다. 시기별 토양 중 NH_4-N함량 및 NO_3-N함량 변화는 표준시비구 및 액비 50%+화학비료 50%구가 생육초기에만 타 처리구보다 약간 높았다. 시기별 관개수 중 NH_4-N함량 변화는 분얼비의 영향으로 급격히 증가하였다가 급격히 감소하였는데 증가한 시기에는 표준시비구 > 액비 50%+화학비료 50%구가 타처리구보다 높았으나, NO_3-N함량은 처리 간 차이가 없었다. 시기별 침투수 중 NH_4-N함량 및 NO_3-N함량 변화는 무비구가 생육초기에 타 처리구보다 약간 높았는데, 이것은 벼 생육불량에 의한 양분흡수가 적어지면서 상대적으로 지중으로 침투가 많았기 때문인 것으로 생각다. 따라서 혐기성 소화액비의 적정 시용기준은 표준시비량의 질소성분 70%을 액비로서 전량기비로 사용하고, 나머지 30% 질소성분을 화학비료로 분얼비 10% · 수비 20% 시용하는 것이 효과적이었다. This study was conducted to evaluate the effect of the proper application level of anaerobic digestion waste water on rice. The waste water was from methane fermentation of pig manure to use as a liquid manure. The mixture treatment of 70% liquid manure and 30% chemical fertilizer (LM 70%+CF 30%) and 100% liquid manure (LM 100%) treatment were higher number of tiller than other treatments at the both tittering and heading stages of rice. The yields of LM 70%+CF 30% and LM 100% treatments were a little higher than that of NPK treatment, but the mixture treatment of 50% liquid manure and 50% chemical fertilizer (LM 50%+CF 50%) was a little lower yield than NPK treatment. The periodic changes of the NH_4-N and NO_3-N contents of the NPK and the LM 50%+CF 50% treatments in paddy soil were a little higher than those of other treatments at the early stage of rice. The NHL_4-N contents of NPK and the LM 50%+CF 50% treatments in irrigation water quality were higher than those of other treatments, however there was no difference in NO_3-N content among the treatments. The NH_4-N and NO_3-N contents of non fertilizer treatment in infiltration water quality were leached a little higher than those of other treatments. It may be due to poor growth of rice following to reduce the nutrient uptake by rice and to increase relatively the nutrient leaching to the ground water. The proper application level of anaerobic digestion waste water as a liquid manure could be suggested to apply LM 70%+CF 30%. All treatments were the same amount of nitrogen content for the standard application amount on rice.