Please use this identifier to cite or link to this item:
Title: Frequency-shaping optimal compensation of low fly-height vibration in high density HDD servo systems
Authors: Xu, J.-X. 
Huang, D.
Venkataramanan, V.
Huynh, T.C.T.
Issue Date: 2011
Source: Xu, J.-X.,Huang, D.,Venkataramanan, V.,Huynh, T.C.T. (2011). Frequency-shaping optimal compensation of low fly-height vibration in high density HDD servo systems. IEEE International Conference on Control and Automation, ICCA : 1343-1348. ScholarBank@NUS Repository.
Abstract: In this work, a novel robust observer-based frequency-shaping optimal feedback (OBFSOF) controller is designed to actively compensate low fly height vibration (LFHV) in hard disk drive (HDD) servo systems. LFHV is a new vibration source due to continuous contact of the read/write head with the media in high density HDDs. The main characteristics of LFHV are the time-varying phase and magnitude, and the wideband frequency spectrum. Differing from many existing non-repeatable runout (NRRO) compensation schemes that focus on a finite number of dominant frequency components, the proposed OBFSOF scheme can suppress infinitely many frequency components concurrently, meanwhile keep robust stability to model uncertainties and disturbances. The effectiveness of the proposed OBFSOF scheme is verified by theoretical analysis and numerical simulations on a real HDD model. By replacing the linear part of PTOS controller with the proposed OBFSOF controller, the maximal LFHV magnitude is decreased by 62.8% comparing with the PTOS controller during the track following stage. © 2011 IEEE.
Source Title: IEEE International Conference on Control and Automation, ICCA
ISBN: 9781457714757
ISSN: 19483449
DOI: 10.1109/ICCA.2011.6138085
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Dec 13, 2017

Page view(s)

checked on Dec 9, 2017

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.