Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
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
Bramson Robert
McCormack John J.
Ro Bentsu
Unisys Corporation
LandOfFree
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.
Profile ID: LFUS-PAI-O-2036403