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A nonlinear control scheme for fast settling in hard disk drives

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3 Author(s)
Ying Li ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore ; Guoxiao Guo ; Youyi Wang

Conventional integral compensation to deal with unknown bias usually leads to long settling process in hard disk drives. This paper proposes a nonlinear proportional integral derivative control scheme to shorten the settling time by reducing the overshoot caused by the integrator, without degradation of other performance specifications. Experiment results show that it is robust against different bias sizes and step sizes. Furthermore, the single-track seek time can scale down well with the track pitch.

Published in:

Magnetics, IEEE Transactions on  (Volume:40 ,  Issue: 4 )

Date of Publication:

July 2004

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