Data storage device on-line adapting disturbance observer filter
US9053726B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2014 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Feb 12, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk comprising tracks defined by servo sectors. A location of the head over the disk is measured based on the servo sectors, and a position error signal (PES) is generated representing a difference between a target location for the head and the measured location for the head. An actuator control signal (ACS) is generated in response to the PES, a disturbance compensation signal (DCS) is generated based on the PES and the ACS, and the DCS is filtered with a disturbance observer filter. The ACS is adjusted based on an output of the disturbance observer filter, and the head is actuated over the disk based on the adjusted ACS. The DCS is filtered with a plurality of band-pass filters, and the disturbance observer filter is adjusted based on the plurality of band-pass filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.