Repeatable runout compensation using a learning algorithm with scheduled parameters
US6437936B1 · kind B1 · utility
49Cited by
134References
19Claims
0Family size
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Key dates
| Filing date | Jan 21, 2000 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Jan 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/59627
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for compensating for written-in repeatable runout in a disc drive is provided. Compensation values are determined through an iterative learning process in which parameters of the learning process such as learning gain, servo loop gain, etc. are functions of the iteration number. The learning process also employs a nominal double integrator model of an actuator of the disc storage system. The learning process is also a function of a zero-phase low-pass filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.