Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation

In this paper, a digital feedback control closed-loop is presented for active suppression of flow-induced vibrations on a head gimbals assembly (HGA) in a working hard disk drive (HDD). In this closed loop, a laser Doppler vibrometer was used to detect the flow-induced HGA off-plate vibration as fee...

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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: 2016
Subjects:
Online Access:https://hdl.handle.net/10356/81674
http://hdl.handle.net/10220/40926
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-816742020-03-07T13:19:19Z Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation Min, Hequn Huang, Xiaoyang Zhang, Qide School of Mechanical and Aerospace Engineering Acoustic pressure Active control In this paper, a digital feedback control closed-loop is presented for active suppression of flow-induced vibrations on a head gimbals assembly (HGA) in a working hard disk drive (HDD). In this closed loop, a laser Doppler vibrometer was used to detect the flow-induced HGA off-plate vibration as feedback error signals, a digital controller was implemented to filter the feedback signals, and a piezoelectric disk stuck on the HDD cover inner surface was employed to actuate feedback acoustic pressure around the HGA to exert control on the HGA flow-induced vibrations. The digital controller was designed to enable the closed loop with capabilities of single or simultaneous multiple narrowband control on the HGA flow-induced vibrations. Experiments have been carried out for single- or multi-narrowband active suppression of five principal peaks in the HGA off-plate vibration spectrum, around 1256, 1432, 2144, 2524, and 3474 Hz, respectively. Results show that, with the digital closed loop, distinct vibration suppression of up to 15 dB was achieved on those single principal peaks in single-narrowband active controls, or simultaneous distinct suppression of up to 17 dB can be achieved on all those principal peaks in one multi-narrowband active control. ASTAR (Agency for Sci., Tech. and Research, S’pore) 2016-07-13T03:09:17Z 2019-12-06T14:35:53Z 2016-07-13T03:09:17Z 2019-12-06T14:35:53Z 2014 Journal Article Min, H., Huang, X., & Zhang, Q. (2014). Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation. IEEE Transactions on Magnetics, 50(10), 3302106-. 0018-9464 https://hdl.handle.net/10356/81674 http://hdl.handle.net/10220/40926 10.1109/TMAG.2014.2317150 en IEEE Transactions on Magnetics © 2014 IEEE.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Acoustic pressure
Active control
spellingShingle Acoustic pressure
Active control
Min, Hequn
Huang, Xiaoyang
Zhang, Qide
Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
description In this paper, a digital feedback control closed-loop is presented for active suppression of flow-induced vibrations on a head gimbals assembly (HGA) in a working hard disk drive (HDD). In this closed loop, a laser Doppler vibrometer was used to detect the flow-induced HGA off-plate vibration as feedback error signals, a digital controller was implemented to filter the feedback signals, and a piezoelectric disk stuck on the HDD cover inner surface was employed to actuate feedback acoustic pressure around the HGA to exert control on the HGA flow-induced vibrations. The digital controller was designed to enable the closed loop with capabilities of single or simultaneous multiple narrowband control on the HGA flow-induced vibrations. Experiments have been carried out for single- or multi-narrowband active suppression of five principal peaks in the HGA off-plate vibration spectrum, around 1256, 1432, 2144, 2524, and 3474 Hz, respectively. Results show that, with the digital closed loop, distinct vibration suppression of up to 15 dB was achieved on those single principal peaks in single-narrowband active controls, or simultaneous distinct suppression of up to 17 dB can be achieved on all those principal peaks in one multi-narrowband active control.
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 Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
title_short Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
title_full Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
title_fullStr Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
title_full_unstemmed Digital Feedback Control of the Flow-Induced Vibrations on the Head Gimbals Assembly in Hard Disk Drives: Design and Implementation
title_sort digital feedback control of the flow-induced vibrations on the head gimbals assembly in hard disk drives: design and implementation
publishDate 2016
url https://hdl.handle.net/10356/81674
http://hdl.handle.net/10220/40926
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