Access controller for controlling the seek operation of a head r

Details Access controller for controlling the seek operation of a head r Access controller for controlling the seek operation of a head r

1989-04-05

1991-04-23

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 555

Patent

active

050104250

ABSTRACT:
An access controller includes an access mechanism having at least one head, for moving said head relative to a recording medium in accordance with an input velocity difference signal, driving section responsive to an input seek command, for generating a primary velocity signal in accordance with a distance from a current position of the head to a destination cylinder designated by the seek command, amplifying the primary velocity signal in accordance with input gain data to obtain a target velocity signal, generating an actual velocity signal from position data readout from the recording medium by the head while said head is moved, and generating the velocity difference signal from the target velocity signal and the actual velocity signal to output the velocity difference signal to the access mechanism, and determination section responsive to an input adjustment command, for determining the gain data and outputting the gain data to said driving section.

REFERENCES:
patent: 4887173 (1989-12-01), Sengoku et al.
patent: 4907109 (1990-03-01), Senio
Trikeps (transliterated), Digital Magnetic Recording Technique, 1986, pp. 151-157, "Closed--loop Positioning Control".
Tuuken (Transliterated), Research and Practicality Report, vol. 28, 10th issue, 1979, pp. 2263-2278, "Peripheral Circuit Technology for 800 MB Disk Storage Drive".
Nikkei Electronics, Aug. 3, 1981, pp. 106-119, "Large Capacity Magnetic Disk IBM 3370/3380 and Developing Devices of Other Companies Opposing thereto".

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