Method and apparatus for eliminating external disturbances in a disk drive device
US5402400A · kind A · utility
42Cited by
6References
23Claims
0Family size
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Key dates
| Filing date | Aug 20, 1993 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Aug 20, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/083
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk storage device comprises a microcomputer for estimating an external disturbance compensation signal and storing it and a first adder for adding the external disturbance compensation signal as a feedforward signal to a positioning compensation signal to a drive circuit. Where a positioning compensator for estimating a velocity signal based on a drive signal is provided, a difference signal between the drive signal and a signal proportional to the external disturbance compensation signal, instead of the drive signal, is applied to velocity estimation unit for correction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.