Title :
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
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.878641
