Advanced methods for repeatable runout compensation [disc drives]

Advanced methods for repeatable runout compensation [disc drives]

This paper presents and compares experimental results from two types of periodic disturbance compensation methods. The repeatable runout (RRO) cancellation techniques studied in this paper are adaptive feedforward cancellation (AFC) and repetitive control. Two modifications (phase advance and a feed...

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Veröffentlicht in:IEEE transactions on magnetics 1995-03, Vol.31 (2), p.1031-1036
Hauptverfasser: Sacks, A.H., Bodson, M., Messner, W.
Format: Artikel
Sprache:eng
Schlagworte:
Adaptive control
Applied sciences
Automatic frequency control
Control systems
Data storage systems
Drives
Engineering techniques in metallurgy. Applications. Other aspects
Exact sciences and technology
Geometry
Management. Ergonomics. Economics. Business administration
Memory
Metals. Metallurgy
Programmable control
Rail to rail outputs
Transfer functions
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Beschreibung
Zusammenfassung:This paper presents and compares experimental results from two types of periodic disturbance compensation methods. The repeatable runout (RRO) cancellation techniques studied in this paper are adaptive feedforward cancellation (AFC) and repetitive control. Two modifications (phase advance and a feedthrough term) to the basic AFC structure are also studied experimentally. Of the AFC methods, the feedthrough technique is superior, but the repetitive controller provides better RRO rejection. Overall it is found that the removal of repeatable runout improved the tracking precision by as much as 53%.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.364780