Microactuator-induced reactive forces for fine positioning a sensor
US6542326B1 · kind B1 · utility
27Cited by
13References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Piezoelectric elements or similar microactuators perform fine positioning in a system including at least two masses bendably coupled to a larger body. A servo controller receives a position signal from a sensor on the first mass, from which it generates a signal to control microactuators coupling other masses to the body. The movement of the other masses thereby exerts a controlled reactive force upon the body and upon the first mass. Examples include disc drive systems in which the reactive forces are used to counteract one or more unwanted excitations in an actuator body or actuator arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.