Disk apparatus and method of measuring frequency characteristic

Details Disk apparatus and method of measuring frequency characteristic Disk apparatus and method of measuring frequency characteristic

1996-09-17

1999-02-09

Edun, Muhammad N.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7809, 360 75, G11B 5596

Patent

active

058702423

ABSTRACT:
Servo information is written on a magnetic disk at intervals equivalent to 1/N of where the period at the position of a head is controlled. When the frequency characteristic of a servo loop is measured, a servo controller generates a position signal, which indicates deviation of the head from a reference position, using servo information at a first sampling point, calculates an actuator drive current command value, which drives an actuator, on the basis of the position signal, and controls the actuator based upon the current command value. Further, the servo controller executes processing for generating the position signal, but does not calculate the actuator drive current command value, on the basis of servo information at second through Nth sampling points. A frequency characteristic analyzer inserts a disturbance signal having a predetermined frequency into the servo loop, accepts, at double the sampling frequency, the position signal and the actuator drive current generated based upon each item of servo information, obtains the frequency characteristic of the servo loop and outputs the frequency characteristic.

REFERENCES:
patent: 5602810 (1997-02-01), Horimai et al.

Affiliated with

Also associated with

Rating

Disk apparatus and method of measuring frequency characteristic does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk apparatus and method of measuring frequency characteristic , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk apparatus and method of measuring frequency characteristic will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1954782