Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection

The areal density for hard disk drives has been increasing 100 percent per year for more than a decade since 1990’s. To achieve the higher areal density, the head-disk spacing has to decrease accordingly. When the spacing is reduced to a few nanometers, intermittent contact between the head-slider a...

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Main Author: Yuan, Yanhui
Other Authors: Du Hejun
Format: Theses and Dissertations
Language:English
Published: 2010
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Online Access:https://hdl.handle.net/10356/35498
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-354982023-03-11T17:52:28Z Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection Yuan, Yanhui Du Hejun School of Mechanical and Aerospace Engineering MicroMachines Centre DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics The areal density for hard disk drives has been increasing 100 percent per year for more than a decade since 1990’s. To achieve the higher areal density, the head-disk spacing has to decrease accordingly. When the spacing is reduced to a few nanometers, intermittent contact between the head-slider and the disk is inevitable. The off-track vibration induced by intermittent head-disk contact may interrupt the reading and writing process, hence causing reading/writing errors. To further increase the areal density, the off-track vibrations must be well understood and controlled. This dissertation deals with the off-track vibrations of head-sliders in hard disk drives. Off-track vibrations due to head-disk interactions were simulated. Based on the off-track acceleration range obtained from the simulations, a MEMS accelerometer was designed to detect the slider off-track motion. The micromachined accelerometer was characterized through vibration testing on a shaker. DOCTOR OF PHILOSOPHY (MAE) 2010-04-19T09:12:30Z 2010-04-19T09:12:30Z 2010 2010 Thesis Yuan, Y. H. (2010). Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/35498 10.32657/10356/35498 en 203 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
spellingShingle DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
Yuan, Yanhui
Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
description The areal density for hard disk drives has been increasing 100 percent per year for more than a decade since 1990’s. To achieve the higher areal density, the head-disk spacing has to decrease accordingly. When the spacing is reduced to a few nanometers, intermittent contact between the head-slider and the disk is inevitable. The off-track vibration induced by intermittent head-disk contact may interrupt the reading and writing process, hence causing reading/writing errors. To further increase the areal density, the off-track vibrations must be well understood and controlled. This dissertation deals with the off-track vibrations of head-sliders in hard disk drives. Off-track vibrations due to head-disk interactions were simulated. Based on the off-track acceleration range obtained from the simulations, a MEMS accelerometer was designed to detect the slider off-track motion. The micromachined accelerometer was characterized through vibration testing on a shaker.
author2 Du Hejun
author_facet Du Hejun
Yuan, Yanhui
format Theses and Dissertations
author Yuan, Yanhui
author_sort Yuan, Yanhui
title Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
title_short Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
title_full Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
title_fullStr Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
title_full_unstemmed Off-track vibrations of head sliders in hard disk drives : simulation and a MEMs accelerometer for detection
title_sort off-track vibrations of head sliders in hard disk drives : simulation and a mems accelerometer for detection
publishDate 2010
url https://hdl.handle.net/10356/35498
_version_ 1761781911620943872