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최적 연료주입 모델 추종형 ${\mu}-$합성 제어기의 설계에 관한 연구
황현준,김동완,정호성,손무헌,김영훈,황기현,문경준,박준호,황창선,Hwang, Hyun-Joon,Kim, Dong-Wan,Jeong, Ho-Seong,Son, Mu-Hun,Kim, Yeung-Hun,Hwang, Gi-Hyun,Mun, Kyeong-Jun,Park, June-ho,Hwang, Chang-Sun 제어·로봇·시스템학회 1998 제어·로봇·시스템학회 논문지 Vol.4 No.2
In this paper, we design an optimal model following ${\mu}-$synthesis control system for fuel-injection of diesel engine which has robust performance and satisfactory command tracking performance in spite of uncertainties of the system. To do this, we give gain and dynamics parameters to the weighting functions and apply genetic algorithm with reference model to the optimal determination of the weighting functions that are given by the D-K iteration method which can design ${\mu}-$synthesis controller in the state space. These weighting functions are optimized simultaneously in the search domain which guarantees the robust performance of the system. The ${\mu}-$synthesis control system for fuel-injection designed by the above method has not only the robust performance but also a better command tracking performance than those of the ${\mu}-$synthesis control system designed by trial-and-error method. The effectiveness of this ${\mu}-$synthesis control system for fuel-injection is verified by computer simulation.
모듈러 주거시설의 단위유닛 제작품질 확보를 위한 공장제작도서 개선 연구
황현준(Hwang, Hyun-Jun),정찬우(Jung, Chan-woo) 한국주거학회 2016 한국주거학회 논문집 Vol.27 No.6
In modular architecture, manufacturing drawing which includes whole information for modular unit production is essential since works for modular unit have to be performed in manufacturing factory not construction field. Although the manufacturing drawing is important as known it is insufficient to utilize the manufacturing drawing in modular architecture project and this makes modular unit low-quality with re-work and work time delay. To prevent low-quality modular unit caused by insufficient manufacturing drawing, in this research firstly manufacturing drawing’s current situation and error cases in manufacturing phase of past modular housing project were analyzed, and correlation between reduction of errors occurance frequency and improving manufacturing drawing was verified. Secondly manufacturing drawing improvement factors were deducted in interior, furniture, mechanical work phase which errors’ occurance rate is high and the way of deducting manufacturing drawing lists and contents were suggested with light-weight work as an example in case of new type of errors occurance. A series of research process can contribute to good-quality modular unit by errors reduction. As a result of research, about half of errors occurance can be reduced with suggested manufacturing drawing improvement factors. And the manufacturing drawing process can contribute to modular production which have uniform quality.
황현준(Hwang, Hyun Jun),김명수(KIM, Myung Soo) 대한교통학회 2018 대한교통학회 학술대회지 Vol.78 No.-
1986년 도시교통정비촉진법에 의거해 최초로 법제화된 교통영향평가는 규제가 아닌 공공재의 훼손을 사전에 방지할 수 있는 가이드라인을 제시한다는데 의미를 둔다. 본 연구에서는 대전광역시를 대상으로 교통영향평가 성과분석을 통한 시민교통편의 증진개선 및 예산절감 효과를 검토하였다. 교통영향평가의 개요와 대전광역시 교통영향평가 기준강화 및 이에 따른 문제점과 대응방안을 연구하였으며 유형별 · 사업별 · 자치구별 · 용도별 · 심의형태별 추진현황을 분석하였다. 교통영향평가의 경제적 효과를 연간시간절감, 도로 및 보도 신설 · 확폭, 주차장 설치에 따른 효과, 주요교통안전시설로 나누어 분석하였으며 교통영향평가의 기대효과를 제시하였다.
뉴스포츠 활동이 아동의 건강관련체력과 창의성에 미치는 영향
황현준(Hwang Hyun jun),김경래(Kim Kyeong lae),한용식(Han Yong sik) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.4
이 연구는 방과후 자율체육활동으로 실시한 뉴스포츠 활동이 초등학생들의 건강관 련체력 및 창의성에 어떠한 영향을 미치는지 알아보기 위한 것으로, 경기도 G시에 소 재한 H초등학교 5, 6학년 학생 중 방과후 자율체육활동에 참여하기를 희망하는 학생 20명(남학생 10명, 여학생 10명)을 선정하여 운동집단 20명, 통제집단 20명씩을 배정 하여 운동 처치 전과 후의 건강관련체력과 창의성의 변화를 알아보았다. 운동 처치 전과 후의 차이를 알아보기 위하여 t-test를 실시하여 얻은 결과는 다음과 같다. 12 주 동안의 뉴스포츠 활동은 남녀 초등학생의 심폐지구력, 근력, 근지구력, 및 창의성 향상에 효과적이었다. 집단 간 사후 결과의 비교에서는, 창의성 지수와 하위 5가지 요 인에서 모두 통계적으로 유의한 차이가 나타났으며, 운동집단 내의 사전?사후 결과 의 비교에 있어서도 창의성 지수와 하위 5가지 요인에서 모두 통계적으로 유의한 차 이가 나타났다. 성별에 따른 분석 결과 창의성 지수와 하위 요인 중 유창성, 독창성, 정교성, 성급한 종결에 대한 저항에서 운동집단의 여학생이 비교집단의 여학생에 비 하여 유의하게 높은 것으로 나타났다. 남학생은 하위 요인 중 제목의 추상성에서 유 의한 변화가 있었다. 결론적으로, 뉴스포츠 종목의 하나인 츄크볼 활동은 남녀 초등학 생의 심폐지구력, 근력, 근지구력 및 창의성 향상에 효과적이었다. The purpose of this study was to investigate the effect of newsports activity-tchoukball as a after-school intramural sports on health related fitness and creativity in elementary school students. In order to achieve this purpose, 20 students(male: 10, female: 10) who wish to participated in after-school intramural sports were selected among 5th and 6th grade students. Students were divided into two groups(exercise group: 20, control group: 20). Health related fitness and creativity were measured by t-test between exercise group and control group after newsports activities during 12 weeks. The results are as follows; First, newsports activities during 12 weeks were helpful improvement on cardiovascular endurance, muscular strength and muscular endurance in school children. After 12 weeks, exercise group was improved significantly, but control group was no changes. Second, newsports activities during 12 weeks were improved creativity in elementary school children, but control group was no changes statistically. In conclusion, Tchoukball activities during 12 weeks were effective improving health related fitness and creativity in elementary school students.
복합광원 기반의 광 소결법을 이용한 구리나노잉크 패턴의 전도성 향상에 관한 연구
황현준(Hyun-Jun Hwang),오경환(Kyung-Hwan Oh),김학성(Hak-Sung Kim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
We developed an ultra-high speed photonic sintering method involving flash white light (FWL) combined with near infrared (NIR) and deep UV light irradiation to produce highly conductive copper nano-ink film. Flash white light irradiation energy and the power of NIR/deep UV were optimized to obtain high conductivity Cu films. Optimally sintered Cu nano-ink films produced using a deep UV-assisted flash white light sintering technique had the lowest resistivity (7.62 μΩ·㎝), which was only 4.5-fold higher than that of bulk Cu film (1.68 μΩ·㎝).