Rotational vibration compensation using microactuator
US8976483B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 10, 2014 |
| Grant date | Mar 10, 2015 |
| Priority date | — |
| Expiry date | Feb 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a feedback controller receiving feedback from a position error signal of a hard drive read/write head. The feedback controller provides respective voice coil motor and microactuator control signals to a voice coil and microactuator that together position the hard drive read/write head in response to a position control signal. A rotational vibration feed-forward compensator receives vibration measurements via a sensor and providing a rotational vibration compensation signal in response thereto. A dynamic control allocator is coupled to the feedback controller and the rotational vibration feed-forward compensator. The dynamic control allocator is configured to combine a high frequency component of the rotational vibration compensation signal with the microactuator control signal; and to combine a low frequency component of the rotational vibration compensation signal with the voice coil motor control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.