Appeal No. 2002-1180
Application No. 08/924,552
The invention is directed to a microactuator servo system in
a disk drive. In particular, the movement of the microactuators
is controlled based on the movement of one or more of a plurality
of other data heads. Some claims recite that the movement of the
microactuators is controlled based on relative positions of a
coarse actuator and each of the plurality of microactuators.
Other claims are drawn to the use of a model-based, multiple-
input, multiple-output (MIMO) servo controller for providing an
output signal to each of a plurality of microactuators to control
the position of associated data heads by actuation of the
microactuators.
Representative independent claim 19 is reproduced as
follows:
19. A servo system in a disc drive having a plurality of
data heads and a plurality of disc surfaces, each data head being
associated with a disc surface, the servo system comprising:
a coarse actuator, coupled to the plurality of data heads to
position the plurality of data heads relative to the disc
surfaces;
a plurality of microactuators, one microactuator being
associated with each data head; and
a model-based, multiple-input, multiple-output (MIMO) servo
controller providing an output signal to each of the plurality of
microactuators to control position of the associated data heads
by actuation of the microactuators.
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