Positioning control apparatus
US5305158A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 1991 |
| Grant date | Apr 19, 1994 |
| Priority date | — |
| Expiry date | May 30, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A positioning control apparatus comprises a feedback compensatory system and a feedforward compensatory system. The feedforward compensatory system comprises a detector for detecting a position of a controlled object whose position is to be controlled, and a compensator connected to the detector. The feedforward compensatory system comprises a first filter having a characteristics reverse to that of the feedback compensatory system, and a second filter having a characteristics reverse to that of the object. A desired drive signal generator supplies the feedforward compensatory system with a desired drive signal having a frequency spectrum having a minimum at the mechanical resonance frequency of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.