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이민철(Min Cheol Lee),박일광(IL Kwang Park) 대한산업공학회 2017 대한산업공학회 춘계학술대회논문집 Vol.2017 No.4
As part of the defense innovation policy, the policy to expand commercialization of military products is a procurement innovation policy designed to reduce defense budget and improve military convenience by replacing existing defense standard products with equivalent or superior products. This paper examines the procurement performance of commutated munitions from 2012 to 2016, and analyzes the procurement performance of the munitions commercialization innovation policy.
초등학교 남학생의 줄넘기운동이 신체구성성분 및 AHP에 미치는 영향
이민철(Min Cheol Lee) 한국발육발달학회 2007 한국발육발달학회지 Vol.15 No.1
This study was to find out that regular and long-term rope-skipping had influence on AHP and the physical variety of senior elementary schoolboys and was to analyse the effect. Furthermore, this experiment was intended to have a positive effect on the growth of elementary schoolboys. The objects were the 5th and 6th grade male students in the elementary school. The numbers of experimental group were 14, the numbers of control group were 16. Most students had no experience in any exercise, and so let them jump rope in school easily. They jumped rope over 40 minutes, five-times a week. The rope-skipping is the exercise that cause MES(minium effective strain) for bones. The contents for measurement were weight, height, body-fat and AHP. They were measured before the exercise and 12 weeks later. The results of study were as follows; 1. In the height of the experimental group, after 12 weeks there was a little increase-+1.57cm(P<.001)-, and also in the control group, there was a little increase-+1.23cm(P<.001). 2. In the weight of the experimental group, after 12 weeks there was a little increase-+0.69kg(P<.001), and also in the control group there was a little increase-+0.59kg(P<.01). 3. In the body fat, both the experimental group and the control group had no much difference before and after exercise. 4. In AHP of the experimental group, after 12 weeks there was a little increase-+1.00cm(P<.01). On the other hand, in AHP of the control group, there was a little decrease -2.76cm(P<.001). In the result, the rope-skipping had a positive effect on AHP and the physical variety of senior elementary schoolboys. In the experimental group, AHP was increased, but in the control group, it was decreased. Therefore, this study could suggest that in the 5th grade and 6th grade male students of the elementary school-that is a maximum growth period-, regular and long-term rope-skipping had influence on the growth of them.
KAAS 차량 시뮬레이터의 워시아웃 알고리즘 감성 평가
이민철(Min Cheol Lee),김문식(Moon Sik Kim),김경달(Kyoung Dal Kim),문영근(Young Ceun Moon) 한국자동차공학회 2006 한국자동차공학회 Symposium Vol.- No.-
A vehicle driving simulator is a virtual reality device which makes a man feel as if he drove an actual vehicle. Unlike actual vehicles, the simulator has limited kinematic workspace and bounded dynamic characteristics. So it is difficult to simulate dynamic motions of a multi-body vehicle model. In order to overcome these problems, a washout algorithm which controls the workspace of the simulator within the kinematic limitation is needed. However, a classical washout algorithm contains several problems such as generation of wrong sensation of motions by filters in tilt coordination, requirement of trial and error method in selecting the proper cut-off frequencies, difficulty in returning the simulator to its origin using only high pass filters and etc. This paper proposes new tilt coordination method as an algorithm which gives more accurate sensations to drivers. To reduce time in returning the simulator to its origin, an algorithm that applies selectively onset mode from high pass filters and return mode from error functions is proposed. As a result of this study, the results of the proposed algorithm are compared with the results of classical washout algorithm through the human perception models. Also, the performance of the suggested algorithm is evaluated by using human perception and sensibility of some drivers through experiments. Put Abstract here. Put Abstract here. Put Abstract here. Put Abstract here. Put Abstract here. Put Abstract here.
석탄가스화 복합발전용 가스터빈의 상압 및 고압연소특성에 관한 실험적 연구
이민철(Min Chul Lee),서석빈(Seok Bin Seo),윤영빈(Youngbin Yoon) 한국추진공학회 2011 한국추진공학회 학술대회논문집 Vol.2011 No.11
에너지기후시대에 신에너지원 발굴, 저탄소 녹색성장의 일환으로 석탄 IGCC기술이 개발 중에 있다. 본 연구는 IGCC기술 중 가스화기에서 생산된 합성가스를 가스터빈에 직접 주입시 생길 수 있는 문제점을 미리 파악하고, 그 연소특성자료를 축적하기 위해 수행되었다. GE7EA연소기를 대상으로한 상압 및 고압연소실험을 통해 합성가스의 기본적인 연소특성을 파악하였으며, 수소화염이 과다한 NOx발생의 원인임을 파악하고, 질소희석을 통해 NOx배출량을 제어할 수 있음을 확인하였으며, 연소진동은 크게 발생치 않음을 확인하였다. 본 연구를 통해 축적된 시험 데이터는 2015년에 국내 최초로 준공예정인 태안 IGCC플랜트에 연소진단시스템 및 최적화 기술적용시 활용된 예정이다. In the era of energy climate, IGCC technology is one of the powerful solutions for the demands of new energy with low carbon green growth. The present study is conducted to investigate the combustion characteristics of syngas from the coal gasifier to predict problems when it is fed to the gas turbine. Through high and low combustion tests, we understood that hydrogen is the main reason of NOx emission but easily controled by injecting the dilution of nitrogen. CO emission of syngas was comparable with that of methane and pressure fluctuation of syngas was not significant. The data from this study will be used for the optimization of combustion in the Korea first IGCC plant in 2015.