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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.
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.
실험계획법을 이용한 텔레매틱스 HMI 평가에 관한 연구
신희종(Heejong Shin),유시복(Sibok Ryu),우진명(Jinmyung Woo),천환규(Hwankyu Chun),이장일(Jangil Lee),서명원(Myungwon Suh) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Recently, telematics devices have been used for driver’s safety and convenience .Telematics market including navigation is getting bigger and bigger. However, traffic accident from using telematics equipment is also increasing. Drivers may lose glance using navigation, and driver’s workload will also grow by driver’s distraction. This thesis is base on the study about the influence on the driver’s workload according to combination of display by DOE(design of experiment). The main object of this thesis is measuring the workload according to the telematics usage by HMI (Human Machine Interface) in the virtual reality. The result of these experiments is that workload when driver used navigation was different with a style of text type. Also, it confirmed the significant result from the statistics analysis.