Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive

This paper presents an experimental investigation and numerical simulation on the spectrum-spatial characteristics of aerodynamic pressure fluctuations around the head gimbals assembly (HGA) in a working hard disk drive (HDD). The pressure fluctuations are measured thro...

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Main Authors: Min, Hequn, Huang, Xiaoyang, Zhang, Qide
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2012
Subjects:
Online Access:https://hdl.handle.net/10356/94324
http://hdl.handle.net/10220/7453
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-943242023-03-04T17:18:22Z Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive Min, Hequn Huang, Xiaoyang Zhang, Qide School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Fluid mechanics This paper presents an experimental investigation and numerical simulation on the spectrum-spatial characteristics of aerodynamic pressure fluctuations around the head gimbals assembly (HGA) in a working hard disk drive (HDD). The pressure fluctuations are measured through tiny holes on the HDD top cover above the HGA. The positioning error signal and servo system sensitivity in the working HDD are measured as well to evaluate the slider off-track vibration. Comparisons between the spectra of pressure fluctuations and the slider off-track vibration show that, the ressure fluctuations around the HGA are highly associated with the slider off-track vibration in terms of principal peaks in the spectra, especially at 1.83 kHz and 2.54 kHz. The results also show that the spatial coherence of pressure fluctuation around the HGA remains high at frequencies around the principal peaks in the spectra, which has been further confirmed by the numerical simulation based on a two-dimensional large eddy simulation model. It is concluded that the flow-induced HGA vibrations in an HDD can be detected and evaluated through the pressure fluctuations by a sensor around the HGA. Accepted version 2012-01-06T07:54:15Z 2019-12-06T18:54:13Z 2012-01-06T07:54:15Z 2019-12-06T18:54:13Z 2011 2011 Journal Article Min, H., Huang, X., & Zhang, Q. (2011). Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive. IEEE Transactions on Magneticsm, 48(1), 101-106. 0018-9464 https://hdl.handle.net/10356/94324 http://hdl.handle.net/10220/7453 10.1109/TMAG.2011.2169419 160037 en IEEE transactions on magnetics © 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [DOI: http://dx.doi.org/10.1109/TMAG.2011.2169419 ] 7 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::Fluid mechanics
spellingShingle DRNTU::Engineering::Mechanical engineering::Fluid mechanics
Min, Hequn
Huang, Xiaoyang
Zhang, Qide
Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
description This paper presents an experimental investigation and numerical simulation on the spectrum-spatial characteristics of aerodynamic pressure fluctuations around the head gimbals assembly (HGA) in a working hard disk drive (HDD). The pressure fluctuations are measured through tiny holes on the HDD top cover above the HGA. The positioning error signal and servo system sensitivity in the working HDD are measured as well to evaluate the slider off-track vibration. Comparisons between the spectra of pressure fluctuations and the slider off-track vibration show that, the ressure fluctuations around the HGA are highly associated with the slider off-track vibration in terms of principal peaks in the spectra, especially at 1.83 kHz and 2.54 kHz. The results also show that the spatial coherence of pressure fluctuation around the HGA remains high at frequencies around the principal peaks in the spectra, which has been further confirmed by the numerical simulation based on a two-dimensional large eddy simulation model. It is concluded that the flow-induced HGA vibrations in an HDD can be detected and evaluated through the pressure fluctuations by a sensor around the HGA.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Min, Hequn
Huang, Xiaoyang
Zhang, Qide
format Article
author Min, Hequn
Huang, Xiaoyang
Zhang, Qide
author_sort Min, Hequn
title Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
title_short Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
title_full Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
title_fullStr Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
title_full_unstemmed Aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
title_sort aerodynamic pressure fluctuations associated with flow-induced vibration of the head gimbals assembly inside a hard disk drive
publishDate 2012
url https://hdl.handle.net/10356/94324
http://hdl.handle.net/10220/7453
_version_ 1759856202230005760