Techniques for disk servo track following

Details Techniques for disk servo track following Techniques for disk servo track following

1988-03-11

1989-12-05

Ro, Bentsu

Electricity: motive power systems

Positional servo systems

With stabilizing features

318611, 318619, G05B 501

Patent

active

048855162

ABSTRACT:
Described is a novel technique and associated arrangement for determining the noise-free value of a system parameter (e.g., head position in a disk drive) which is time variable and (usually) has a noise component as detected. The technique involves processing the (as detected) noise-including value and passing it through "Second Order/Summing" filter means.
For instance, the technique is described as particularly useful with the "track-following servo" (part of the transducer positioning means) in a high density disk file (where track density is higher than usual) to secure superior head-displacement error values which are more noise-free. Thus, (see FIG. 4), a pair of first values V.sub.a, V.sub.b are secured by detecting motor current sense voltage V.sub.i, integrating it with respect to time and passing the result through a pair of novel "second order filter" means--one hand-pass (F.sub.1) the other low-pass (F.sub.2); while also securing a third value V.sub.c by detecting position error (signal voltage, including noise components) in the usual manner and passing it through a "secod order low-pass" filter F.sub.3 ; then algebraically summing these to secure a relatively noise-free position error signal V.sub.xo

REFERENCES:
patent: 3648031 (1972-03-01), Neal
patent: 3673395 (1972-06-01), Tripp
patent: 3808486 (1974-04-01), Cuda et al.
patent: 4010463 (1977-03-01), Kay
patent: 4030132 (1977-06-01), Iftikar et al.
patent: 4071886 (1978-01-01), Eicher
patent: 4148452 (1979-04-01), Niesen et al.
patent: 4200827 (1980-04-01), Oswald
patent: 4298833 (1981-11-01), Edwards et al.
patent: 4387624 (1983-06-01), Bjurstrom

Affiliated with

Also associated with

Rating

Techniques for disk servo track following does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Techniques for disk servo track following, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Techniques for disk servo track following will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2036403