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|Title:||Feedforward control for reducing disk-flutter-induced track misregistration||Authors:||Guo, G.
Hard disk drive
Servo control system
|Issue Date:||Jul-2003||Citation:||Guo, G., Zhang, J. (2003-07). Feedforward control for reducing disk-flutter-induced track misregistration. IEEE Transactions on Magnetics 39 (4 II) : 2103-2108. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2003.814287||Abstract:||We show in this paper that the disk vertical vibration signal picked from the slider in a hard disk drive has a fairly good correlation to the track misregistration at the disk flutter frequencies. We propose to introduce a feedforward controller into the usual servo loop to reduce disk-flutter-induced track misregistration (TMR). The feedforward controller is an approximated differential element with the disk vertical direction velocity as input. In our experimental setup, we show that such a method can reduce the TMR induced by the first four disk flutter modes by an average of about 56%. The method can potentially be used in high-track-per-inch servo track writers to reduce the written-in repeatable runouts.||Source Title:||IEEE Transactions on Magnetics||URI:||http://scholarbank.nus.edu.sg/handle/10635/56041||ISSN:||00189464||DOI:||10.1109/TMAG.2003.814287|
|Appears in Collections:||Staff Publications|
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