Disk drive with mode canceling actuator
US6583964B1 · kind B1 · utility
33Cited by
10References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1999 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Mar 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/08
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive having an arm assembly equipped with a primary actuator such as a VCM and a mode-canceling actuator such as a PZT mounted at a location selected in such a way that the strain in the mode-canceling actuator is in phase with sway deformations of the primary actuator produced by the vibrational modes of the arm assembly. The primary actuator is driven to exert a primary force, on the arm assembly while the secondary driver ensures that the mode-canceling actuator applies a mode-canceling force, on arm assembly such that the gain and phase of one or more vibrational modes are canceled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.