Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2008.2004893
Title: Midfrequency runout compensation in hard disk drives via a time-varying group filtering scheme
Authors: Thum, C.K.
Du, C.
Chen, B.M. 
Ong, E.H.
Tan, K.P.
Keywords: Hard disk drive (HDD)
Linear time-varying systems
Mechatronics
Repeatable runout (RRO)
Servo systems
Issue Date: Dec-2008
Source: Thum, C.K., Du, C., Chen, B.M., Ong, E.H., Tan, K.P. (2008-12). Midfrequency runout compensation in hard disk drives via a time-varying group filtering scheme. IEEE Transactions on Magnetics 44 (12) : 4769-4779. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2008.2004893
Abstract: Conventional add-on feedback filters that are designed to compensate for midfrequency (mid- ) repeatable runout (RRO) in a hard disk drive (HDD) servo system either have a long filter transient or constitute a large sensitivity hump as well as poor stability margins. This paper presents a novel linear time-varying (LTV) group filtering scheme for the compensation of a few mid- RRO harmonics. While having a short filter transient that ensures fast disturbance attenuation, the proposed filter does not constitute to any substantial unnecessary sensitivity function gain amplification at the steady state. Simulation and implementation results show the effectiveness of this group filtering scheme. © 2008 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/56633
ISSN: 00189464
DOI: 10.1109/TMAG.2008.2004893
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