Disturbance compensation determination apparatus, a related method, a computer-readable medium storing a computer program related to the method, and a disk drive comprising the apparatus
US7777982B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2007 |
| Grant date | Aug 17, 2010 |
| Priority date | — |
| Expiry date | Mar 21, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/596
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disturbance compensation determination apparatus, a related method, a computer readable medium storing a computer program related to the method, and a disk drive comprising the apparatus are provided. The disturbance compensation determination apparatus includes a disturbance observer (DOB) receiving a control input signal and a servo output signal of a plant, wherein the DOB calculates and outputs a current estimated disturbance value. The apparatus also includes a disturbance evaluation unit selectively changing a current disturbance compensation (DC) mode, wherein selectively changing the current DC mode comprises evaluating an accumulated estimated disturbance value in accordance with a condition corresponding to the current DC mode. In addition, the apparatus includes a switching unit selectively providing the current estimated disturbance value to a control loop of the plant in accordance with the current DC mode as selectively changed by the disturbance evaluation unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.