Digital compensator for controlling a servo to correct the value of a given parameter of a system
US5511052A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Apr 18, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45178
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A digital compensator controls a servomechanism, such as the focus servo of an optical disk drive. The compensator waits one full sample period before applying the correction that was calculated for the proceeding sample. The compensator does not use the present input sample in its calculation of the present output sample. The method for operating the digital compensator comprises the steps of receiving a first input sample at time t.sub.1, receiving a second input sample at time t.sub.2, and computing a first output in response to the first input sample at time t.sub.2. The method does not require a present input sample to calculate a present output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.