Adaptive track follow control
US8896955B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2011 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Sep 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59694
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive comprises a track follow control system having a plurality of selectable frequency modes, the track follow control system configured to receive a position error signal and to output a control signal based on the position error signal, wherein the control signal is used by a head assembly to position a head over a disk. The disk drive also comprises a state estimator configured to receive the control signal and a position signal indicating a position of the head, to estimate a disturbance based on the control signal and the position signal, and to output an estimated disturbance signal based on the estimated disturbance. The disk drive further comprises a disturbance evaluator configured to receive the estimated disturbance signal, and to select one of the frequency modes of the track follow control system based on the estimated disturbance signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.