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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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2010
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| Online Access: | https://hdl.handle.net/10356/35498 |
| _version_ | 1811696570959134720 |
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| author | Yuan, Yanhui |
| author2 | Du Hejun |
| author_facet | Du Hejun Yuan, Yanhui |
| author_sort | Yuan, Yanhui |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T07:41:28Z |
| format | Thesis |
| id | ntu-10356/35498 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:41:28Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics |
| url | https://hdl.handle.net/10356/35498 |
| work_keys_str_mv | AT yuanyanhui offtrackvibrationsofheadslidersinharddiskdrivessimulationandamemsaccelerometerfordetection |