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[論文] Cycle Simulation에 의한 가솔린기관의 성능과 배출물 예측
이종원(C. W. Lee),정진은(J. E. Chung) 한국자동차공학회 1983 오토저널 Vol.5 No.2
The prediction of performance and emissions is presented for a spark ignition engine. A two zone, zero-dimensional model was employed which included thermodynamics, combustion and heat transfer, and a kinetic model employed for Nox. The model was used to analyze the processes of compression, combustion and expan~ sion. Cylinder pressures and temperatures were calculated as a function of crankangle as well as engine performance and emissions.<br/> Predictions made with the simulation were compared with experimental data from a four cylinder spark ignition engine. Calculated pressures and. Co and CO₂ con centrations showed acceptable quantitative agreement with data. But calculated No concentrations were slightly different.<br/> A parametric study of the effect of variations in speed, combustion duration and spark timing was carried out. This simulation can be useful for design of spark ignition engines.
김상철 ( S C Kim ),배동호 ( D H Bae ),김강식 ( K S Kim ),박용윤 ( Y Y Park ),이종원 ( J W Lee ),박신호 ( S H Park ) 한국축산학회 1971 한국축산학회지 Vol.13 No.2
Digestibility comparisons were made using Korean native cattle, native goat, sheep, rabbit, pig and poultry with two different roughages, two different concentrates and soybean oil cake. a. Digestibility difference for roughages There were no significant differences in digestion coefficients, D.C.P. and T.D.N, content, except N.F.E in the case of good quality hay, and crude protein and crude fat in the case of poor quality hay between Korean native cattle, native goat and sheep. However, there were significant differences between the animals mentioned above and rabbit in all digestion coefficients, D.C.P. and T.D.N. content, except crude protein and crude fat. b. Digestibility difference for concentrates There were significant differences in digestion coefficients and digestible nutrients between the animal used. Digestibility of sheep and native goat, and pig and poultry showed similar trend. Rabbit Showed the highest T.D.N. content in the case of corn. However, this superiority in digestibility disappeared in the case of wheat bran. c. Digestibility difference for soybean oil cake Significant differences in digestibility of crude fat, N.F.E. crude fiber, and T.D.N. content were found between ruminants and monogastric animals. No significant differences were observed in digestibility of crude protein and D.C.P. content between the animals used.
김태욱 ( T. W. Kim ),유주열 ( J. Y. Yu ),신동창 ( D. C. Shin ),이종원 ( J. W. Lee ),이현우 ( H. W. Lee ) 한국농공학회 2013 한국농공학회 학술대회초록집 Vol.2013 No.-
온실기둥 상승장치는 인상하고자 하는 기둥에 보강대를 설치하고 보강대 하부에 공압구동기를 설치하여 구동하며, 구동시 보강대가 50mm 인상되면 공압구동기가 멈추고 하부의 고정멈춤장치가 보강대를 지지하게 메카니즘을 설계하였다. 고정멈춤장치에 보강대가 지지대면 구동장치는 원위치로 하강한다. 하강시 다음 행정에서 보강대를 밀어 올릴 수 있도록 실린더 로드 보강대를 하강시킨다. 보강대는 기둥이 인상되면 측면으로 전복되는 수평력을 지지하기 위해 보강 띠를 설치하고 보강띠는 지상부에 설치된 텐션너에 의해 지지되도록 설계하였다. 텐션너는 기둥이 인상되면 수동으로 작동하여 보강대 인상시 지속적으로 보강대에 수평력이 유지되도록 하였다. 본 연구에서 개발한 온실 기둥 인상장치의 구동방식은 공압식으로 설계하였다. 유압식은 작동유압이 3,000psi이며 100psi 정도에 작용하는 공압식에 비해 단위면적당 30배정도의 힘을 받을 수 있는 장점이 있어, 하우스 인상시 인상보조지주에 그림 1와 같이 유압장치을 내장 설계하여 기구의 단순성의 단점이 있다. 그러나 유압장치의 유압유니트는 공압유니트에 비해 설치비가 고가이고, 유지관리시 작동유체을 완전히 밀폐하여야 하고 시스템작동시 시스템의 기밀을 유지하여야 하는 문제가 있다. 농업시설물을 인상하는 장치는 이동이 빈번하고 설치장소가 변경되는 점을 고려하면 유지관리의 문제가 발생할 수 있고 작동유의 유출은 농작물에 치명적인 해를 끼칠수 있는 단점이 있다. 따라서 본 연구는 작동장치를(공압실린더)인상보조지주에 내장하지 않고 지주외부에 노출시켜 설계하여 유압장치보다는 부피가 많이 차지하는 단점이 있으나 시스템의 구성단가가 저렴하고 시스템의 유지보수 측면에서 유리한 공압시스템으로 설계하였다.
이종원(C.W.Lee),지원호(W.H.Jee),김철순(C.S.Kim),문영수(Y.S.Mun),김영대(Y.D.Kim) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this work, three algorithms combined with two frequency response<br/> function (FRF) estimation methods are proposed for the purpose of regeneration of field <br/> data for six degrees of freedom vehicle motion simulators. Then the algorithms are <br/> tested and the rates of convergence are investigated through simulations with mathematical<br/> nonlinear models and laboratory experiments. The performances of each algorithm are <br/> evaluated based on the variance calculated from the error between the given field data and <br/> the regenerated data in the frequency domain. Extensive simulation and experimental works <br/> suggest that the algorithm, which uses the inverse FRF estimation method and takes into <br/> account the inherent system nonlinearity. reveals the best and satisfactory performance in <br/> the regeneration of field data for the laboratory vehicle motion simulator.<br/>
Filtered-X LMS 알고리즘을 적용한 능동 엔진 마운트의 진동 절연 효과
이용욱(Y.W.Lee),이종원(C.W.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
There are two seemingly contradictory requirements on engine mount:support of engine torque,and isolation of engine vibration from chassis. The first needs hard mount while the other needs soft one, but it is hard to satisfy both of them with passive engine mount. To overcome this difficulty, the active engine mount(AEM)is developed. The AEM features electro-magnetic actuator to generate secondary force so that it cancels the force transmitted to chassis by engine vibration. By examining some force cancellation schemes, the Filtered-X LMS algorithm is selected to compute the secondary vibration. This algorithm is programmed on DSP,and by experiment, it is verified that the AEM using the Filtered-X LMS adaptive controller is capable of cancelling periodic disturbance force.<br/>
이종원(C.W.Lee),박윤식(Y. S. Park),박관흠(K.H.Park),조영호(Y. H. Cho) 한국자동차공학회 1983 오토저널 Vol.5 No.3
This paper discussed about Application Technique of Numerical Methods for large structure. The dynamic behaviours of a vehicle were investigated through finite element modelling. After dividing a vehicle body into three substructures, Basic Mass System was composed of 60 flexual modes which was obtained from the dynamic characteristics of each substructure using Modal Synthesis Method. Engine, transmission and rear axle, etc. Were added to Basic Mass Model, consequently Full Mass System was constructed by 72 degree of freedoms. Full Mass System was analyzed over the frequency range 0.5-50.0 Hz under the loading conditions which were Stationary Gaussian Random Process.<br/> Results and discussions provided the guidelines to eliminate resonances among the parts and to improve the Ride Quality. The Absorbed Power was used as a standard to determine the Ride Quality. The RMS value of driver's vertical acceleration was obtained 0.423g from the basic model and 0.415g from the modified model.