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Efficient implementation of adaptive feedforward runout cancellation in a disk drive

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3 Author(s)
Weerasooriya, Siri ; Data Storage Inst., Nat. Univ. of Singapore, Singapore ; Zhang, J.L. ; Low, T.S.

This paper presents an improved adaptive feedforward compensation (AFC) technique for periodic disturbance cancellation. It has a better rate of convergence than AFC. It can also compensate for a particular harmonic without amplifying the adjacent uncompensated harmonics. A frequency domain design strategy is proposed. The results are verified both through simulations and by an experiment on a disk drive with a dedicated servo channel

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 5 )