Adaptive-repetitive control of a hard disk drive

This paper presents a control scheme intended to target both the non-repeatable and repeatable runout disturbances affecting the dynamics of a hard disk drive (HDD). The design can be broken up into three stages. The first stage consists of a LTI feedback controller designed using classical techniqu...

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Bibliographic Details
Published in2007 46th IEEE Conference on Decision and Control pp. 4519 - 4524
Main Authors Perez Arancibia, N.O., Chi-Ying Lin, Tsu-Chin Tsao, Gibson, J.S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.12.2007
Subjects
Adaptive control
Circuit noise
Disk drives
Hard disks
Programmable control
Rail to rail outputs
Resonance light scattering
Signal processing algorithms
Tracking
Vibration measurement
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Summary:This paper presents a control scheme intended to target both the non-repeatable and repeatable runout disturbances affecting the dynamics of a hard disk drive (HDD). The design can be broken up into three stages. The first stage consists of a LTI feedback controller designed using classical techniques. The second stage consists of a RLS-based adaptively tuned controller. Finally, the last stage incorporates a new controller which integrates repetitive and adaptive elements. The repetitive part of this controller allows us to target specific periodic disturbances visible in the disturbance spectrum. The adaptive part is intended to cancel the inter-notch stochastic disturbances. The key element in this design is the formulation of an appropriate optimization problem, solvable recursively by the use of some of the available adaptive-filtering algorithms. Experimental results obtained from the implementation of this method in a commercial HDD demonstrates the effectiveness of this approach.
ISBN:9781424414970
1424414970
ISSN:0191-2216
DOI:10.1109/CDC.2007.4434235