Information recording/reproducing apparatus and method
US6496323B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1999 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Sep 20, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To improve the positioning accuracy which has been limited so far due to a vibration mode of an actuator for positioning a head and increase the capacity of an apparatus by raising the density of tracks for recording or reproducing information.There are provided an information recording/reproducing medium, a head for recording or reproducing information while moving relatively to the information recording/reproducing medium, an actuator for supporting the head and movable in accordance with a command, and a control section for supplying a command to the actuator in accordance with a signal reproduced by the head to control the movement of the actuator,the actuator has at least one vibration mode in addition to a movement mode as a rigid body, andthe control section is configured by an internal model including at least one vibration mode of the actuator and has a state estimating section for estimating quantities of states of the vibration mode and rigid-body mode of the actuator in accordance with a controlled variable corresponding to a movement command to the actuator and a controlled-variable generating section for generating a controlled variable in accordance with each estimat…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.