Velocity estimator in a disk drive positioning system

Details Velocity estimator in a disk drive positioning system Velocity estimator in a disk drive positioning system

1991-03-01

1992-03-10

Psitos, Aristotelis

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

360 7804, 369 32, G11B 2110, G11B 2108

Patent

active

050954717

ABSTRACT:
For a disk drive having a servo positioning system for moving and positioning a read/write head in track seeking and following operations, a velocity estimator connected to derive velocity signals selectively from a plurality of position signals, the phasing of said position signals being such that at least one of the signals at any given radial position of ther head varies linearly with radial head displacement, that is, with a constant change in signal level per unit of radial displacement. The phase of the position signals are such that as one position signal is about to leave its linear operating region, another is in its linear operating region. The velocity estimator comprises a plurality of sections each selectively switched to receive and differentiate a position signal and connected so that there is not current surge resulting form such switching.

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