Modeling and Low-Order Control of Hard Disk Drives With Considerations for Product Variability

Author

Graham, M.R. ; de Callafon, Raymond A. ; Shrinkle, L.

Author_Institution

Dept. of Mech. & Aerosp. Eng., Univ. of California San Diego, La Jolla, CA

Volume

42

Issue

10

fYear

2006

Firstpage

2588

Lastpage

2590

Abstract

To maximize bandwidth for a hard disk servo system in the presence of modeling uncertainty, a tradeoff between performance and controller complexity is addressed by control-relevant modeling and robust control. Control-relevant modeling is accomplished by using the information of the appropriate weighting functions used in the control design to find a model via frequency domain curve fitting. This paper illustrates control relevant modeling using frequency domain data and design of a high bandwidth servo system in the presence of modeling uncertainty. Results using real-time implementation show agreement between the designed and achieved bandwidths

Keywords

curve fitting; digital control; disc drives; frequency-domain analysis; hard discs; servomechanisms; controller complexity; digital control; frequency domain curve fitting; hard disk drives; modeling uncertainty; product variability; servosystems; Bandwidth; Control design; Disk drives; Hard disks; Robust control; Robust stability; Servomechanisms; Transfer functions; Uncertainty; Upper bound; Digital control; modeling; servosystems;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2006.878641

Filename

1704373