Techniques for disk servo

Details Techniques for disk servo Techniques for disk servo

1983-12-12

1986-03-18

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 2110

Patent

active

045772444

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 "second 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: 3458785 (1969-07-01), Sordello
patent: 3648031 (1972-03-01), Neal
patent: 3660744 (1972-05-01), Plummer
patent: 4030132 (1977-06-01), Iftikar
patent: 4177430 (1979-12-01), Paul
patent: 4200827 (1980-04-01), Oswald
patent: 4267496 (1981-05-01), Ivanov
patent: 4284942 (1981-08-01), Bigley
patent: 4288731 (1981-09-01), Lee
patent: 4295081 (1981-10-01), Bigley
patent: 4337427 (1982-06-01), Maudal

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