公开(公告)号：DE2861774D1

公开(公告)日：1982-06-09

申请号：DE2861774

申请日：1978-12-07

Applicant: IBM

Inventor： MATLA ARNO ,  MATTHAEI HORST ,  ZIMMERMANN VOLKER

IPC: H02K33/18 ,  F16F15/03 ,  G05B19/39 ,  G11B5/55 ,  G11B5/58 ,  H02P25/06

Abstract: In a signal storage apparatus employing a rotating record disk, the resonant frequency of a head carriage assembly is tuned to the rotational speed of the record disk. The head carriage assembly, in following a record track on the record disk, has to accommodate record disk rotational perturbations; i.e., run out, eccentric mounting, etc. Such variations are better accommodated in the head carriage assembly by electrically tuning the head carriage assembly to the rotation of the record disk. In a voice coil head assembly actuator, a pair of opposing coils carry equal current amplitudes. These equal current amplitudes are adjusted to rotational speed of the record disk to thereby continuously tune the head carriage assembly to the record disk rotation.

公开(公告)号：FR2413746A1

公开(公告)日：1979-07-27

申请号：FR7834438

申请日：1978-11-30

Applicant: IBM

Inventor： MATLA ARNO ,  ZIMMERMANN VOLKER

IPC: G05D3/12 ,  G11B5/55 ,  G11B21/08 ,  G11B21/10 ,  G11B5/012

Abstract: During the access mode of a movable magnetic head in a disk file, a program of position control signals is derived from a simulator, the input of which is clocked at sector time intervals. The position control signals of the simulator are periodically transferred to the summing point of a servo loop which successively is error conditioned, dependent on the subsequent nominal magnetic head positions derived from the simulator. Servo sectors on the data disk are sampled by the magnetic head, evaluated and converted to a digitally coded position error signal. The error signal is summed with a digital position control signal, and the output sum signal in analog form is applied to the motor that drives the head. The track following function is accomplished by means of a closed servo loop, which is also used in the access mode.

公开(公告)号：AU2437777A

公开(公告)日：1978-10-26

申请号：AU2437777

申请日：1977-04-18

Applicant: IBM

Inventor： LOUIS HELMUT ,  MATLA ARNO ,  SCHALLER KARL HEINZ ,  ZIMMERMANN VOLKER

IPC: G11B5/596 ,  G11B17/00 ,  G05D3/00 ,  G11B5/02

公开(公告)号：FR2336760A1

公开(公告)日：1977-07-22

申请号：FR7634523

申请日：1976-11-08

Applicant: IBM

Inventor： LOUIS HELMUT ,  MATLA ARNO ,  SCHALLER KARL H ,  ZIMMERMANN VOLKER

IPC: G11B21/08 ,  G11B5/596 ,  G11B21/10 ,  G11B5/54

Abstract: The surface of a magnetic disk (23) is divided into servo sectors (S1) and data sectors (S2). A selectively positionable magnetic head (24) effects, in predetermined time intervals controlled by clock signals of a clock sensor (26), the transfer of servo and data signals. The servo signals sensed in the servo sectors are used for the track following control of the magnetic head.