Track following transducer position control system for a disk storage drive system
US5065263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1989 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | May 17, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A position control system for a disk storage drive system which includes a data transducer for recording and playback of the information stored in a desired data track of an information storage disk having a plurality of data storage tracks thereon, includes: a driver unit for actuating the data transducer; a position encoder of detecting a variation in movement of the data transducer and for producing a current position signal thereof; a tracking error detector for producing a tracking error signal upon detecting a positional difference of the data transducer from the desired data track; a track deflection estimator for estimating a deflection of track resulting from either eccentricity or undulation of the data track and for generating a feed-forward signal based on the estimation, and a discrete-time control loop for controlling the driver unit in accordance with the tracking error signal. The discrete-time control loop includes a compensating position calculator for calculating a compensating position command signal from the tracking error signal and an interpolation calculator for generating an interpolation signal which is supplied to the driver unit through interpolation wit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.