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실험계획법을 이용한 PTL시스템의 힌지 포인트 설계변수의 민감도 분석에 관한 연구
정충민(Choongmin Jeong),김배영(Baeyoung Kim),정병대(Byeongdae Jeong),박경태(Gyeongtae Park),허하영(Hayoung Heo),송종원(Jongwon Song),윤근하(Gunha Yoon),서명원(Myungwon Suh) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Recently, vehicle part industry is now face with the task of satisfaction customer’s needs and cost reduction. Accordingly, vehicle part industry needs advanced techniques. This paper is the study about sensitivity analysis of design variable of PTL(Power Trunk Lid) hinge point. It is precedent study of optimum design of PTL hinge point. In this study, we analyze sensitivity of each design variable, and ranked it. As a result, we could find appropriate design variable of PTL system. PTL system is very important to accommodate customer’s needs, but we have to depend on foreign affiliated now. This result can be applied to design of PTL system, and we expect reduction of cost and satisfaction of customer’s demands.
유전자 알고리즘을 이용한 도시철도차량의 예방정비주기 최적화에 관한 연구
정충민(Choongmin Jeong),박기준(Keejun Park),이장일(Jangil Lee),신동준(Dongjun Shin),송아영(Ah-young Song),백우경(Wookyung Baik),서명원(Myungwon Suh) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Recently, system including aircraft, train, and ship is more complex and huger. These systems are used to public transport to a lot of people. Accordingly, safety becomes to more important problem. But excessive maintenance cause a lot of maintenance cost. So we need maintenance cost reduce by efficiency operating. In this research, we found the optimum maintenance cycle using genetic algorithm. This result can be applied to RCM(Reliability Centered Maintenance) and web-based Reliability Information Management System that requires optimum maintenance cycle and cost.
Youngun Lee,Choongmin Lim,김성환,신승훈 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.3
A comparative study on the Au(I)-catalyzed and IBr-promoted tandem cyclization of 1,5-enyne was reported. This study provides a meaningful mechanistic insight to the concerted nature of this tandem reaction and also provides interesting applications in the synthesis of 7/5- or 8/5-fused bicycles and biaryls.
다목적함수 최적화를 이용한 PTL 시스템의 힌지 포인트 설계에 관한 연구
송종원(Jongwon Song),정충민(Choongmin Jeong),정병대(Byeongdae Jeong),송아영(AhYeong Song),윤근하(Gunha Yoon),서명원(Myungwon Suh) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
A smart vehicle represents an ASV(advanced safety vehicle) which can supplement limitations on sight and perception of driver and passenger with a basis of Active Vehicle Control Technology. Thus, it is necessary to develop an innovative technology which is able to increase the safety and convenience of existing vehicles. The thesis is a study to design PTL(Power Trunk Lid) System by Multi-Objective Optimization. It is analyzed by Taguchi design of experiment with the table of orthogonal arrays, and the optimum design point is chosen on the base of the aforementioned analysis which applies Multi-Objective Optimization. PTL System is very important in terms of accepting demands of customers. However, it is currently dependent on the technology of advanced foreign enterprises. PTL System design can apply to the outcome. Furthermore, the satisfaction with costs and customers’ demands and the decrease of costs can be expected as well.
송종원(Jongwon Song),이호용(Hoyong Lee),정충민(Choongmin Jeong),이승찬(Seungchan Lee),백우경(wookyung Baek),송아영(AhYoung Song),서명원(Myungwon Suh) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
Lower Floor Tram(LFT) is a innovative transport system which would complement the environmental consideration, such as reducing emission, and economic aspect, such as operating and maintenance costs retrenchment. In this reasons, introduction of LFT is in the interest of America, Europe, Japan and so on. In Korea, it is required for construction LFT system to ease traffic congestion and provide convenience for transportation vulnerable. In order to this, the advanced technology about tram should be developed and the safety and efficiency should be optimized. In this paper, the structure modeling and dynamic analysis of the LFT is performed, and the performance and riding comfort is evaluated. Then the design variables were optimized by DOE(Design of Experiments) and ANOM(Analysis of Mean).
후방추돌 시 목 상해 최적화 시트 개발을 위한 해석적 방법론 연구
백우경(Wookyung Baik),김배영(Baeyoung kim),김시우(Siwoo kim),정충민(Choongmin Jung),송아영(Ahyoung Song),서명원(Myungwon Suh) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
Recently, whiplash injury from rear end collision has been important in automotive industrial because There is no successful safety device for rear end collision, even though there are a lot of vehicle safety device for front end collision such as seat belt, air bag. But, vehicle industry tends not to develop safety device for rear end collision because of not only cost but also it"s effectiveness. Therefore, this research developed methodology using Finite Element Method (FEM) for optimization about vehicle seat for whiplash injury as future study. All kind of analysis result was correlated with test result in order to obtain proper optimization. Also, this paper suggested seven design parameters such as shapes of seat, material properties for optimization.
차량의 후방추돌시험을 위한 시나리오 및 가상환경평가 개발연구
백우경(Wookyung Baik),김배영(Baeyoung kim),김시우(Siwoo kim),정충민(Choongmin Jung),송종원(Jongwon Song),서명원(Myungwon Suh) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Vehicle safety device such as active headrest and rear detection system has been developing as people are interested about rear end collision more than before. However, there is not any standard or criterion in order to evaluate vehicle safety device for rear end collision. Also there is not test protocol about rear end collision in vehicle experiment. Therefore, this research developed scenario for experiment about rear end collision in vehicle experiment. Also this research evaluated dangerousness about vehicle test and fitness about re-enacting rear end collision using scenario developed using commercial software (PC-Crash) which can re-enact vehicle collision in virtual vehicle experiment. Scenario developed according to statistics from National Highway Traffic safety Administration and German In-Depth Accident Study. Scenario has twelve cases which composed of Re-LVS (Rear end Leading Vehicle Stop), Re-LVM (Rear end Lead Vehicle Moving) and scenario for evaluation about malfunction of active headrest.
Reliability Path와 Cut을 이용한 시스템의 신뢰도 계산방법에 관한 기초연구
이장일(Jangil Lee),박기준(Keejun Park),천환규(Hwankyu Chun),정충민(Choongmin Jeong),서명원(Myungwon Suh) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Recently, System including aircraft, train, and ship is more complex and huger. Accordingly, Reliability calculation of these systems is more difficult. This paper is the study about reliability calculation algorithm using reliability path and cut of complex system that is difficult to analyze solution. If system has simple series structure or parallel structure in reliability block diagram, we can easily find analytical solution. But when system has very complex structure, we are very difficult to find analytical solution of the system. In this case, we can assess system reliability using failure enumeration method of reliability path and cut. This research represent reliability block diagram by adjacent matrix and define reliability path and cut. We can find any system status by failure enumeration of reliability path and cut. As a result, we can calculate any kinds of system reliability through this process. This result can be applied to RCM(Reliability Centered Maintenance) and web-based Reliability Information Management System that requires system reliability being composed by reliability of individual part.