Disk storage apparatus
US7064919B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2001 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Aug 12, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a disk storage apparatus having an actuator for loading/unloading a magnetic head with respect to a magnetic disk, a voltage signal generated when the actuator is driven is detected by a voltage detector, a speed load estimator estimates moving speed of the head and level of load disturbance added to the magnetic head from a driving signal in a driver of the actuator and the voltage signal, and outputs a speed estimating signal and a load estimating signal, a speed controller generates and outputs a speed control signal based on a speed command signal and the speed estimating signal, a synthesizer generates a driving signal from the load estimating signal and a speed control signal, and the apparatus loads and unloads the head at a stable speed against the load disturbance caused by friction or the like on a ramp block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.