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[동력전달계부문] Dual Mass Flywheel 시스템의 특성 시험 평가 기술
최성진(S.J. Choi),최규재(G.J. Choi),임종순(J.S. Im),장우석(W.S. Jang),박규성(K.S. Park) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, methods for performance characterization testing of Dual Mass Flywheel system (DMF) are presented. The DMF system is used to reduce the torsional vibration and noise occurring in automotive powertrain. It isolates rotational irregularities largely from engine rotational fluctuation. To measure the performance characteristics of DMF, real vehicle testing modes are investigated and measuring equipments are installed in three types of powertrain of a vehicle.<br/> The performance characterization testing of three systems are performed and compared to each other. And the investigated testing methods will be used to test the performance of DMF systems.<br/>
신품종 감자 오륜과 미백의 소괴경 생산을 위한 분무경시 적정 재식밀도
전신재 ( S. J Jeon ),맹진희 ( J. H. Maeng ),이안수 ( A. S. Lee ),최성진 ( S. J. Choi ),김종환 ( J. W. Kim ),김인종 ( I. J. Kim ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2016 강원 농업생명환경연구 Vol.28 No.1
지상부 생육의 경장은 오륜 품종에서 재식밀도가 높아짐에 따라 64.8 cm에서 103.8 cm로 길어졌으나, 미백 품종은 경장, 경경, 마디수에서 재식밀도 간 차이가 없었다. 주당 생체중은 오륜 품종은 16주/㎡, 미백품종은 32주/㎡까지 차이가 없었다. 엽면적지수는 오륜 품종에서는 재식밀도별로 각각 4.4, 9.3, 12.0, 23.4로 직선적으로 높아졌고, 미백품종은 1.3, 2.4, 4.4, 5.3으로 약간 높아졌다. 주당괴경 수량성은 밀식에 의하여 괴경수와 총 괴경중이 감소하였다. 그러나 단위면적당 수량은 오륜품종은 처리별로 각각 2.14, 5.17, 6.65, 7.82 kg/㎡이었고, 미백품종은 1.38, 2.33, 4.60, 4.83 kg/㎡이었다. 소괴경 개수는 오륜 품종에서는 각각 54, 120, 180, 210개/㎡ 이었고, 미백 품종은 89, 150, 294, 357개/㎡ 이었다. 평균 서중은 미백 품종 15.1 g, 오륜 품종 39.2 g 으로 품종 간 차이는 있었으나, 처리에 따른 차이는 크지 않았다. 소괴경 생산을 위한 조직배양묘 분무경시 최대수량을 보이는 재식밀도는 두 품종 모두 64주/㎡이었으나, 조직배양묘의 소요량, 지상부 과번무에 따른 병해 발생 우려 등을 고려했을 때 32주/㎡가 적정할 것으로 판단되었다. This study was conducted to optimize planting density for potato micro-tuber production in spring season. Potato in vitro plantlets, cv Oryun and Mibaeg, were grown aeroponically at four different plant densities (8, 16, 32 and 64 plants/m2). Plant height was increased in Oryun varieties from 64.8 cm to 103.8 cm with increased planting density, but in Mibaeg did not differ at height, stem diameter and the number of nodes. Fresh weight was no difference up to 16 plants/㎡ in Oryun and 32 plants/㎡ in Mibaeg. Leaf area index was linearly increased in Oryun 4.4, 9.3, 12.0 and 23.4, respectively. But Mibaeg was slightly increased from 1.3 to 5.3. The number of tubers and weight per plant was decreased by high planting density in both varieties. However, the yield per square meter were 2.14, 5.17, 6.65 and 7.82 kg in Oryun, 1.38, 2.33, 4.60 and 4.83 kg in Mibaeg. We also observed that the number of micro-tubers, in Oryun 54, 120, 180 and 210 and in Mibaeg 89, 150, 294 and 357. The average tuber weight was 39.2 g in Oryun and 15.1 g in Mibaeg, but there is no difference among the planting density. Even though the maximum yields were 64 plants/㎡ in both varities, we concluded that 32 plants/㎡ were optimum planting densities, considering the requirments of plantlets and disease caused by excessive planting.
신품종 감자 “미백”의 씨감자 소괴경 생산을 위한 분무경과 배지경의 비교
전신재 ( S J Jeon ),맹진희 ( J H Maeng ),이안수 ( A S Lee ),최성진 ( S J Choi ),김종환 ( J W Kim ),김인종 ( I J Kim ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2015 강원 농업생명환경연구 Vol.27 No.3
Two different cultivation systems, aeroponics and hydroponics, were compared for the production of new potato cultivar ‘Mibaeg’ minitubers. Plants in the aeroponics showed increased vegetative growth in height, fresh weight, root length, and number of stolen. Also, the number and weight of minituber were increased in aeroponics. In aeroponics, the number of tuber was 9.1 per plant and the weight was 180.2 g. On the other hand, there was no difference in average tuber weight. The ratio of tuber height and width was higher in aeroponics. Tubers grown in aeroponics showed an increased number of opended lenticels, due to hight humidity conditions in the system. The characteristics of breaking dormancy and sprouts were no difference in cultivate system, but size of tuber was effected.
[동력전달계부문] 차량 구동계의 진동·소음 저감을 위한 이중 질량 플라이휠 개발(Part 1)
장우석(W.S. Jang),박규성(K.S. Park),최성진(S.J. Choi),최규재(G.J. Choi) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As part of the effort to reduce the vibration and noise such as Gear rattle noise of transmission, Vehicle body booming in Power train System, a Dual Mass Flywheel has been designed. Specifically, We have designed a new Dual Mass Flywheel that can be obtained to reduce the vibration of Power train system by controlling a Drive plate's function in accordance with the engine torque characteristic curve and traveling condition of the vehicle. It is the IL]IN Dual Mass Flywheel's advantage that an Ideal torque characteristic curve was needed to achieve the optimal shock absorbing effect of torsional vibration of Power train system. The drive plate is formed as an axe shape such that the roller of the spring assembly roller in contact with the characteristic shape of the drive plate is to dampen the torsional vibration of Power train system. The purpose of this paper is to compare the dynamic behavior of the ILJIN Dual Mass Flywheel with that of the another company's Dual Mass Flywheel. Global dynamic behavior of the Power train system is analyzed by Finite Element Method(FEM). The Vibration characteristic responses of the Power train system from dynamic analysis, such as Normal mode analysis, Modal frequency response analysis, and Non-linear transient response analysis are fed back as loading condition, moment of inertia values, each of stiffness to the Finite Element Model to obtain dynamic responses for critical parts of the Power train system.