Please use this identifier to cite or link to this item:
Title: Singular perturbation control for vibration rejection in HDDS using the PZT active suspension as fast subsystem observer
Authors: Pang, C.K. 
Lewis, F.L.T.
Ge, S.S. 
Guo, X.
Chen, B.M. 
Lee, T.H.
Keywords: Hard disk drives (HDDs)
Singular perturbation
Issue Date: Jun-2007
Citation: Pang, C.K., Lewis, F.L.T., Ge, S.S., Guo, X., Chen, B.M., Lee, T.H. (2007-06). Singular perturbation control for vibration rejection in HDDS using the PZT active suspension as fast subsystem observer. IEEE Transactions on Industrial Electronics 54 (3) : 1375-1386. ScholarBank@NUS Repository.
Abstract: Currently, position sensors other than the read/write head are not embedded into current hard disk drives (HDDs) due to signal-to-noise ratio and nanometer resolution issues. Moreover, a noncollocated sensor fusion creates nonminimum phase zero dynamics which degrades the tracking performance. In this paper, the singular perturbation theory is applied to decompose the voice coil motor's (VCM's) and induced PZT active suspension's dynamics into fast and slow subsystems, respectively. The control system is decomposed into fast and slow time scales for controller designs, and control effectiveness is increased to tackle more degrees-of-freedom via an inner loop vibration suppression with measured high-frequency VCM's and PZT active suspension's dynamics from the piezoelectric elements in the suspension. Experimental results on a commercial HDD with a laser doppler vibrometer show the effective suppression of the VCM and PZT active suspension's flexible resonant modes, as well as an improvement of 39.9% in 3σ position error signal during track following when compared to conventional notch-based servos. © 2007 IEEE.
Source Title: IEEE Transactions on Industrial Electronics
ISSN: 02780046
DOI: 10.1109/TIE.2007.893074
Appears in Collections:Staff Publications

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


checked on Jun 25, 2021


checked on Jun 17, 2021

Page view(s)

checked on Jun 23, 2021

Google ScholarTM



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