Determining microactuator failure in a multi-stage tracking system
US8467144B2 · kind B2 · utility
12Cited by
3References
20Claims
0Family size
Assignee
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Key dates
| Filing date | May 6, 2011 |
| Grant date | Jun 18, 2013 |
| Priority date | — |
| Expiry date | Dec 22, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A multi-stage tracking control system includes at least a main actuator and a microactuator. The tracking control system is switched to a single-stage mode so that the main actuator alone provides tracking. A disturbance signal is applied to the microactuator while in the single-stage mode, and a failure condition of the microactuator is determined based on a position error generated in response to the disturbance signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.