Presents the repeatable runout (RRO) compensation in hard disk drives (HDDs). To cancel the RRO, we applied repetitive controllers to the tracking system. Through experiments, we obtained a high reduction ratio of from 10 to 45 dB for up to 10th harmonics component of the RRO. Furthermore, by switching filter parameters between the learning state and the steady state, we obtained fast learning of less than two disk rotations.
No takes yet. Share an insight, caveat, or question.
Onuki et al. (2001) studied this question.
Synapse has enriched one closely related paper. Consider it for comparative context: