System for positioning a transducer
US5151639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1991 |
| Grant date | Sep 29, 1992 |
| Priority date | — |
| Expiry date | Feb 8, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J19/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention proposes a system for positioning a control object such as a magnetic head by moving the object at a high velocity without generation of vibration. An actuator loads the magnetic head and an arithmetic control device controls a drive motor of the actuator based on a result of digital arithmetic determination. The arithmetic control device computes target position, target velocity and target acceleration of each sample period in accordance with polynomials indicating predetermined target position, target velocity and target acceleration. The arithmetic control device then outputs at least one error between a) the target position or target velocity as a result of determination and b) position or velocity of the magnetic head at every sample period and controls the drive motor with an added output of the position error or velocity error and target acceleration as a result of the determination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.