Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives

High speed flows in working hard disk drives (HDDs) can induce offtrack vibrations on a head gimbals assembly (HGA), which limit positioning accuracy of the slider magnetic head on the tip of the HGA for high magnetic storage density in disks. This paper presents experimental studies and numerical s...

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Main Authors: Huang, X. Y., Min, H., Zhang, Q. D.
Other Authors: School of Mechanical and Aerospace Engineering
Format: Conference or Workshop Item
Language:English
Published: 2014
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Online Access:https://hdl.handle.net/10356/85376
http://hdl.handle.net/10220/18632
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-853762023-03-04T17:07:24Z Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives Huang, X. Y. Min, H. Zhang, Q. D. School of Mechanical and Aerospace Engineering Symposium on Fluid-Structure-Sound Interactions and Control (2nd : 2013 : Hong Kong, China) DRNTU::Engineering::Mechanical engineering::Fluid mechanics High speed flows in working hard disk drives (HDDs) can induce offtrack vibrations on a head gimbals assembly (HGA), which limit positioning accuracy of the slider magnetic head on the tip of the HGA for high magnetic storage density in disks. This paper presents experimental studies and numerical simulations on the flow-induced vibrations (FIV) of the HGA inside an HDD and active control of such vibrations. Firstly, the HGA off-track vibration and the airflow pressure fluctuations around the HGA are measured to characterize the FIV of the HGA. Secondly, we propose an active control strategy for such FIV of the HGA, in which feedback acoustic pressures are employed to suppress pressure fluctuations in turbulence around the HGA. Numerical simulations have been carried out on this issue by introducing virtual sensors into the close regions around the HGA. Finally, by using the FIV on the HGA as feedback error signals through the laser Doppler vibrometer, the feedback control of FIV on the HGA has also been demonstrated. Accepted version 2014-01-21T01:12:29Z 2019-12-06T16:02:43Z 2014-01-21T01:12:29Z 2019-12-06T16:02:43Z 2014 2014 Conference Paper Huang, X. Y., Min, H., & Zhang, Q. D. (2013). Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives. Lecture Notes in Mechanical Engineering, Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control, pp.405-411. https://hdl.handle.net/10356/85376 http://hdl.handle.net/10220/18632 10.1007/978-3-642-40371-2_58 172080 en © 2014 Springer-Verlag Berlin Heidelberg. This is the author created version of a work that has been peer reviewed and accepted for publication by Proceedings of the 2nd Symposium on Fluid-Structure-Sound Interactions and Control, Springer-Verlag Berlin Heidelberg. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1007/978-3-642-40371-2_58]. 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
Huang, X. Y.
Min, H.
Zhang, Q. D.
Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
description High speed flows in working hard disk drives (HDDs) can induce offtrack vibrations on a head gimbals assembly (HGA), which limit positioning accuracy of the slider magnetic head on the tip of the HGA for high magnetic storage density in disks. This paper presents experimental studies and numerical simulations on the flow-induced vibrations (FIV) of the HGA inside an HDD and active control of such vibrations. Firstly, the HGA off-track vibration and the airflow pressure fluctuations around the HGA are measured to characterize the FIV of the HGA. Secondly, we propose an active control strategy for such FIV of the HGA, in which feedback acoustic pressures are employed to suppress pressure fluctuations in turbulence around the HGA. Numerical simulations have been carried out on this issue by introducing virtual sensors into the close regions around the HGA. Finally, by using the FIV on the HGA as feedback error signals through the laser Doppler vibrometer, the feedback control of FIV on the HGA has also been demonstrated.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Huang, X. Y.
Min, H.
Zhang, Q. D.
format Conference or Workshop Item
author Huang, X. Y.
Min, H.
Zhang, Q. D.
author_sort Huang, X. Y.
title Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
title_short Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
title_full Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
title_fullStr Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
title_full_unstemmed Feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
title_sort feedback control of flow-induced vibrations on head gimbals assembly inside hard disk drives
publishDate 2014
url https://hdl.handle.net/10356/85376
http://hdl.handle.net/10220/18632
_version_ 1759854665745301504