公开(公告)号：CA1110359A

公开(公告)日：1981-10-06

申请号：CA314763

申请日：1978-10-30

Applicant: IBM

Inventor： MATLA ARNO ,  ZIMMERMAN VOLKER

IPC: G05D3/12 ,  G11B5/55 ,  G11B21/08 ,  G11B21/10 ,  G11B17/00

Abstract: Digital position error signals from a position detector and a track increment generator are summed and applied to a compensator which is responsive to these signals during the sampling of servo sectors on the tracks of a magnetic disk of a magnetic disk store to regulate the position of a magnetic head for track selection and track following. Track selection is effected with an acceleration phase, a constant velocity phase, and a deceleration phase, and overshooting of the magnetic head at the ends of the acceleration and deceleration phases is avoided by digital modification signals read out, from read-only memories in the track increment generator, to the compensator. The digital position error signal from the track increment generator can be combined with the output of a track crossing detector.