Servo system with once per revolution rejection

Details Servo system with once per revolution rejection Servo system with once per revolution rejection

1994-05-19

1997-03-11

Ip, Paul

Electricity: motive power systems

Positional servo systems

318561, 318610, 360 7812, 360 7804, 369 32, H02P 300, G11B 555

Patent

active

056104871

ABSTRACT:
A servo system for controlling the position of a read/write head over a rotating data disk is disclosed. The servo system includes the addition of a compensation scheme to the feedback loop that causes the open loop gain of the servo to increase only in a very narrow spectrum of its operating bandwidth. In a preferred embodiment, the compensation takes the form of a second order digital filter combined with a proportional-integral-differential phase compensation filter in the feedback loop of an embedded servo system for a digital data disk drive.

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patent: 5327298 (1994-07-01), Ottesen et al.
patent: 5371670 (1994-12-01), Lurie
patent: 5377058 (1994-12-01), Good et al.
patent: 5402400 (1995-03-01), Hamada et al.

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