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[차량운동성능부문] ADAMS를 이용한 Active Height Control System이 장착된 Sport Utility Vehicle의 조종안정성 해석
김완일(Wanil Kim),이정우(JeongWoo Lee),김학균(HaakKyun Kim),두민수(MinSoo Doo),김효석(HyoSeok Kim),도원주(WonJoo Doh) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_2
In this paper we propose an Active Height Control system which consists of an automatic air leveling and semiactive suspension system for an SUV (sport utility vehicle). Prior to a real car installation to estimate the vehicle performance and tune the control logic, we model the vehicle with flexible body frame and AHC system using ADAMS. We analyzed the vehicle handling performance for various driving conditions by simulation. Then we apply the AHC system to an SUV and tested its performances.
Suspension system과 Braking system을 이용한 UCC system 개발에 관한 연구
고유석(Youseok Kou),김완일(Wanil Kim),김동신(Dongshin Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Purpose of this work is for developing UCC system to enhance vehicle stability and driving comfort through vehicle test and computer simulation. The system characteristics of suspension control systems(CDC system for damping control and Rear Wheel Steering system for rear slip angle) are analyzed and that of ESP system is discussed for braking control system. The integrated control of the respective systems is applied to reduce the cost of the sensor and enhance the vehicle performance, This study will present the base of the development of UCC.
각질형성세포에서 Fisetin의 피부장벽 기능 개선 및 항노화 효능 검증
이경하 ( Kyung-ha Lee ),김완일 ( Wanil Kim ) 대한화장품학회 2020 대한화장품학회지 Vol.46 No.4
플라보노이드(flavonoid)는 식물 등의 대사체에서 유래한 폴리페놀 계열의 화합물이며, 다양한 인체생리작용을 조절할 수 있는 것으로 알려져 있다. 이중 3,3’,3’,7-tetrahydroxyflavone (fisetin)은 다양한 과일과 채소에서 발견되며, 최근 노쇠용해(senolytic) 활성을 통해 특정 조직의 기능을 회복시킨다는 것이 알려졌다. 본 연구에서는 인간 표피 각질세포를 대상으로 하여 fisetin의 피부장벽 유전자 발현 조절 및 항노화 효능을 분석하였다. Fisetin은 말단소립 역전사효소(telomerase)의 활성을 증가시켰으며, CDKN1B 유전자의 발현을 감소시켰다. 또한 피부장벽을 구성하는 주요 유전자인 KRT1, FLG, IVL, DSP의 발현을 증가시켰으며, 세라마이드 합성효소의 일종인 CerS3, CerS4 유전자의 발현을 증가시켰다. 이러한 결과는 fisetin의 효능이 노쇠용해에 국한되지 않고 인간 각질세포의 다양한 생리학적 조절에도 관여함을 보여준다. 따라서 fisetin은 화장품 및 의약품 등의 생리활성 조절물질로 활용될 수 있다고 사료된다. Flavonoids are polyphenolic compounds derived from plants metabolites and are known to be capable of controlling various human physiological functions. Among them, fisetin (3,3’, 3’, 7-tetrahydroxyflavone) is found in various fruits and vegetables, and it has been recently known to restore the function of certain tissues through senolytic activity. In this study, targeting human epidermal keratinocytes, control of skin barrier genes and antioxidant efficacy of fisetin were analyzed. Fisetin increased the activity of telomerase and decreased the expression of CDKN1B. In addition, it increased the expression of KRT1, FLG, IVL, and DSP, which are main genes that make up the skin barrier. The fisetin also increased the expression of CerS3 and CerS4 genes, which are forms of ceramide synthases. These results show that the efficacy of fisetin is not limited as senolytics but is also involved in various physiological regulation of human keratinocytes. Therefore, we consider that fisetin could be used as an active ingredient in cosmetics and pharmaceuticals.
자동차 기능안전 표준 ISO-26262에 따른 개발방법 및 EPS용 토크센서 개발에 적용사례
황건열(Keonyeol Hwang),유광호(Kwangho Yoo),서정욱(Jungwook Seo),김완일(Wanil Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In this paper, we introduce functional safety standard ISO-26262 based development process. It is required to change not only existing processes but also organization to correspond to ISO-26262 standard requirements effectively. Development method modification can be summarized following 4 steps. First, adding of new process steps and roles. Second, finding relationships with existing process and roles and applying new steps. Third, applying new development method based on ISO-26262 standard. And finally, changing and adding supporting processes. And we also include case study of torque sensor development based on ISO-2626 for EPS. Major analysis such as hazard analysis and risk assessment, functional/technical safety concept, FMEDA and FIT are discussed to recommend approach to the standard requirements.