Abstract
This paper discusses the new concept of a hybrid damper for application in low-frequency accelerometers. A hybrid damping structure is proposed in which an air damping principle and an eddy current damping principle are integrated into one damping structure. A prototype of the hybrid damper was fabricated and applied to a low-frequency accelerometer structure. A free-vibration test was conducted on the accelerometer structure in various damping configurations: air-damped, eddy-current-damped and hybrid-damped. The experimental results indicate that the proposed hybrid damper exhibits good damping performance in comparison with single-damped cases while still maintaining their original advantages, such as their low cost, simple structure and nonsealing, nonelectric system. The proposed hybrid damping system will be useful for other small machinery devices in real applications.
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Jin-Hyuk Kim received the M.S. degree in the Department of Aerospace Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2012. He has been a Ph.D. candidate in the Department of Aerospace Engineering at KAIST since 2012. His primary research interest is in the area of structural analysis, structural vibration, and structural health monitoring for aircraft structures.
Yeon-Gwan Lee received the Ph.D. degree in the Department of Aerospace Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 2013. He has been a senior researcher in The 1st R&D Institute 2 at Agency for Defense Development (ADD) since 2013. His primary research interest is in the area of structural analysis, structural health monitoring for pipe structures and rail bridges, and optical fiber sensors for multi-parameter measurements.
Chun-Gon Kim received the Ph.D. degree in the Department of Aerospace Engineering from the Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea, in 1987. From 1987 to 1991, he was engaged in Composite Materials Laboratory with Korea Institute of Machinery & Materials (KIMM) as a Senior Researcher. He was a visiting researcher of Wright-Patterson Air force Laboratory in 1988. He has been a faculty member in the Department of Aerospace Engineering at KAIST since 1991. He spent his sabbatical year in UCLA in 1998. His primary research interest is in the area of structural health monitoring using optical fiber sensors, characterization of composites in various environments, and multifunctional composite materials and structures.
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Kim, JH., Lee, YG. & Kim, CG. An experimental study on a new air-eddy current damper for application in low-frequency accelerometers. J Mech Sci Technol 29, 3617–3625 (2015). https://doi.org/10.1007/s12206-015-0805-7
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DOI: https://doi.org/10.1007/s12206-015-0805-7