Servo control system operable on digital basis
US4313074A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1980 |
| Grant date | Jan 26, 1982 |
| Priority date | — |
| Expiry date | Apr 28, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/232
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A digital servo control system is responsive to a command signal indicative of a command position of a moveable element and to a phase modulated signal corresponding to the angle of rotation of a motor controlling said moveable element to develop a motor drive signal to position the motor. The system provides control during a velocity control mode and a position control mode, the latter occurring after the moveable element is moved to a predetermined small incremental distance from the commanded position. During the velocity control mode the motor is driven in accordance with a reference velocity selected in dependence upon the position error signal. Following a prescribed time after entry into the position control mode, the position error has added thereto an integration signal which increases in the same sense as the position error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.