Low frequency disturbance compensation control device and disk drive using the same
US7292403B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Nov 6, 2007 |
| Priority date | — |
| Expiry date | May 27, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A servo control device for a disk drive capable of effectively compensating for a low frequency disturbance incoming to the disk drive is provided. The servo control device includes: a state variable estimator calculating a position estimation error based on a control input for controlling motion of a head and a position error signal by using a predetermined state equation; an estimation filter calculating a disturbance estimation value from the position estimation error by using a mathematical relation between a disturbance and the position estimation error; and a subtractor subtracting the disturbance estimation value from the control input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.