Disk drive upsampling servo control signal

摘要

A disk drive is disclosed comprising a disk including a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors. The disk drive further comprises an actuator for actuating a head over the disk in response to an actuator control signal. The servo sectors are read to generate a first sequence of control samples x[k] at a sample rate corresponding to a frequency of the servo sectors. The first sequence of control samples x[k] is upsampled by a factor of N to generate a second sequence of control samples y[ki] according to: y ⁡ [ k i ⁢ | i = 1 : N ] = ( 1 - i N - gamma ) ⁢ u ⁡ [ k - 1 ] + ( i N + gamma ) ⁢ u ⁡ [ k ] where gamma is a scalar greater than or equal to zero and less than one. The actuator control signal is generated in response to the second sequence of control samples y[ki].