Disk drive iteratively adapting correction value that compensates for non-linearity of head
US8891194B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2013 |
| Grant date | Nov 18, 2014 |
| Priority date | — |
| Expiry date | Jun 20, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk. A position y of the head is measured based on servo sectors, and the measured position y of the head is adjusted based on:z1=y+c1(y)where z1 represents a first adjusted position and c1(y) represents first correction values. The first adjusted position z1 is adjusted based on:z2=z1+c2(z1)where z2 represents a second adjusted position and c2(z1) represents second correction values. The first and second correction values are combined based on:c3(y)=c1(y)+c2(y+c1(y)).The measured position y of the head is adjusted based on:z3=y+c3(y)where z3 represents a third adjusted position comprising the adjustment based on c1(y) and the adjustment based on c2(y), and c3(y) represents third correction values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.