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Reduction of flow-induced suspension vibrations in a hard disk drive by dual-stage suspension control

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3 Author(s)
Teerhuis, A.P. ; Dept. of Mech. Eng., Eindhoven Univ. of Technol., Netherlands ; Cools, S.J.M. ; de Callafon, R.A.

A control design methodology is proposed to control an active dual-stage suspension for the reduction of flow-induced vibrations (windage) in a hard disk drive. The design of the controller uses dynamical models of both the suspension and the stochastic behavior of the windage to design a low third-order discrete-time feedback controller to reduce windage-induced track misregistration. Experimental results show that nonrepeatable runout errors due to windage are reduced by an order of a magnitude.

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Magnetics, IEEE Transactions on  (Volume:39 ,  Issue: 5 )