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Title: Active control of flow-induced vibrations on slider in hard disk drives : experimental demonstration
Authors: Min, Hequn
Huang, Xiaoyang
Zhang, Qide
Keywords: DRNTU::Engineering::Mechanical engineering
Issue Date: 2013
Source: Min, H., Huang, X., & Zhang, Q. (2013). Active control of flow-induced vibrations on slider in hard disk drives: experimental demonstration. IEEE Transactions on Magnetics, 49(6), 3038-3041.
Series/Report no.: IEEE transactions on magnetics
Abstract: This paper presents an experimental demonstration on the active control of flow-induced vibrations on a head gimbals assembly (HGA) bearing a slider in a hard disk drive (HDD). The feedback control closed-loop consisted of a laser Doppler vibrometer (LDV), a narrowband frequency filter, a signal conditioner, an in-house made phase shifter, and a piezoelectric disk mounted on the inner surface of the HDD cover. The HGA vibrations detected by the LDV were used as feedback error signals, and the signals were then phase shifted and amplified to drive the piezoelectric disk to generate feedback acoustic pressure around the HGA. The phase shift and gain of the feedback loop were adjusted such that the HGA vibrations were reduced. The experiments of active control have been conducted on five principal peaks in the HGA off-plate vibration spectrum, around 1256, 1428, 2141, 2519, and 3469 Hz, respectively. The results show that reduction of the HGA vibrations can be achieved on all these principal peaks, with a maximum suppression of 16 dB on the peak around 1428 Hz. It is also observed that simultaneous reduction can take place among these peaks when the narrowband feedback control is focused only on one of them.
ISSN: 0018-9464
DOI: 10.1109/TMAG.2013.2239653
Rights: © 2013 IEEE. This is the author created version of a work that has been peer reviewed and accepted for publication by IEEE Transactions on Magnetics, IEEE. 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 DOI: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
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