PQ enhanced observer based dual stage servo controller
US6563665B1 · kind B1 · utility
28Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Jul 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention includes a servo control system for controlling a dual stage actuator in a disc drive. The disc drive includes a data head for accessing information on a disc surface, and the dual stage actuator includes a coarse actuator and at least one fine actuator. The control system includes a fine actuator driver and a coarse actuator driver for driving the fine and coarse actuators, respectively. The control system also includes an observer which receives the coarse and fine actuator input signals and estimates a response of the coarse and fine actuators.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.