Self tuning model reference controller in a disc drive
US6545838B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for moving a head of a disc drive from an initial position to a destination position on a recording surface of a rotatable disc by generating and applying a model reference current to an actuator motor. A servo circuit includes a current profile generator which generates a baseline reference current profile. A gain calculator calculates first and second gain factors in relation to an initial velocity of the head. A gain block generates the model reference current by applying the first gain factor to a first portion of the baseline reference current profile used to accelerate the head and subsequently applying the second gain factor to a second portion of the baseline reference current profile used to decelerate the head, wherein the first and second gain factors have different respective magnitudes to compensate for a nonzero initial velocity of the head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.