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Motor Block의 Optimal Spare 산출 방안
장주수(Ju-Su Jang),윤차중(Cha-Jung Yun),이은규(Eun-Kyu Lee),이을재(Eul-Jae Lee),장정훈(Jeong-Hoon Jang),김용(Yong Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
It is the key component that motor block system affect safety and performance of railway. It is very important to examine the performance of motor block for improvement of safety and reliability of rolling stock. As such the motor block is an essential part of rolling stock. But provisioning quantities and spare quantities depend on the operator' experience. There are many problems that occur lots of spare or lack of spare. If there are lots of spare it is difficult to keep the circumstance by cost issues. On the contrary if there are lack of spare it may have a adverse effect on the whole railway. Thus this study offers method to estimate optimal spare of motor block using the analysis of data related with Failure rate MTBF standards and guidelines. And we expect this study to contribute to determine optimal spare parts.
장주수(Ju-Su Jang),윤차중(Cha-Jung Yun),이은규(Eun-Kyu Lee),이을재(Eul-Jae Lee),장정훈(Jeong-Hoon Jang),김용(Yong Kim) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
The Reliability started for MILitary purposes during World War II in 1942 getting more important for maintenance safety etc in modern society. As technologies develop also international standards for measuring the reliability is advancing. RAMS activities for maintenance safety verification is material to national railroad. And for this it needs quick response for the changes of standards. Even now standards are upgrading for developing electronic technologies. Therefore analysis of failure rate's trend about such standards is judged necessary. So We submit a this paper for comparative analysis of changing process standards according to development of electronic technologies and reliability. At first we compared actual usage ratio of standards for understanding the current state of usage. Based of these state of usage discuss the major standard. And then introduced reliability standards's trend calculation method of failure rate and difference of failure rate calculation standard according to march of time. In this paper used standards are MIL-HDBK-217F Telcodia etc.
김한규,장주수,Kim, Han-Gyu,Jang, Ju-Su 한국생산제조학회 2013 한국생산제조학회지 Vol.26 No.1
Fault Diagnosis is a process of detecting and isolating faults in a system. On demanding for safety and high reliability systems make it important for some reasons such as economical and environmental incentives. Especially embedded technology and IT technology combined with precise sensing techniques has been doing well developed and applied to fault diagnosis and prognosis in industrial systems like as automotive, ship, heavy industry and aerospace as well. This paper, as an empirical application of diesel engine, presents a method how to get raw data from physical systems, what to consider for successful implementation and which theoretic mathematical models should be applied. In a sense of system level Adaptive Filtering (we call Modified Kalman Filter) and a unit of part level Hidden Markov Process was developed and applied.