A study on reliability centered maintenance planning of a standard electric motor unit subsystem using computational techniques |
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Authors: | Chulho Bae Taeyoon Koo Youngtak Son Kyjun Park Jongdeok Jung Seokyoun Han Myungwon Suh |
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Affiliation: | (1) Graduate School of Mechanical Engineering, Sunkyunkwan University, Suwon, 440-746, Korea;(2) Urban Transportation R&D Center, Korea Railroad Research Institute, Uiwang, 437-757, Korea;(3) School of Mechanical Engineering, Sunkyunkwan University, Suwon, 440-746, Korea |
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Abstract: | The design and manufacture of urban transportation applications has been necessarily complicated in order to improve its safety.
Urban transportation systems have complex structures that consist of various electric, electronic, and mechanical components,
and the maintenance costs generally take up approximately 60% of the total operational costs. Therefore, it is essential to
establish a maintenance plan that takes into account both safety and cost. In considering safety and cost limitations, this
research introduces an advanced reliability centered maintenance (RCM) planning method using computational techniques, and
applies the method to a standard electric motor unit (EMU) subsystem. First, this research devises a maintenance cost function
that can reflect the current operating conditions, and maintenance characteristics, of components by generating essential
cost factors. Second, a reliability growth analysis (RGA) is performed, using the Army Material Systems Analysis Activity
(AMSAA) model, to estimate reliability indexes such as failure rate, and mean time between failures (MTBF), of a standard
EMU subsystem, and each individual component Third, two optimization processes are performed to ascertain the optimal maintenance
reliability of each component in the standard EMU subsystem. Finally, this research presents the maintenance time of each
component based on the optimal maintenance reliability provided by optimization processesand reliability indexes provided
by the RGA method.
This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim
Myung-Won Suh is a professor of Mechanical Engineering. During 1986–1988, he worked for Ford motor company as researcher. During 1989–1995,
he worked in the technical center of KIA motors. He earned a BS degree in Mechanical Engineering from Seoul National University
and an MS degree in Mechanical Engineering from KAIST, South Korea. He obtained his Doctorate at the University of Michigan,
USA, in 1989. His research areas include structure and system optimization, advanced safety vehicle and reliability analysis
& optimization.
Chul-Ho Bae is a PhD candidate at Sungkyunkwan University in Suwon, South Korea. He ac-complished fellowship work as researcher at Mississippi
State University, USA, in 2003 and 2005. He worked in Institute of Advanced Machinery and Technology (IMAT) as a Research
Assistant in 2004. He was a part time Lecturer in computer aided Mechanical Engineering of Ansan College of Technology, Suwon
Science College, and Osan College during 2004–2005. He took a BS Degree in Mechanical Design and an MS Degree in Mechanical
Engineering from the Sungkyunkwan University. His research interests include computer aided engineering, reliability engineering,
and optimization. |
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Keywords: | Failure rate Maintenance cost function Maintenance reliability allocation Maintenance plan Mean time between failures Reliability centered maintenance Reliability growth analysis Urban transportation systems |
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