System for creating a servo control signal
US4245298A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jan 15, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41021
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for creating a control reference signal for a remote electrical servo device having a movable output unit wherein the velocity and position of the output unit are controlled by the vector magnitude of the control reference signal. This system includes a digital circuit for creating a first fixed analog signal indicative of a known or desired velocity for the unit during a preselected controlled time interval and a second digital means for creating a desired time base positional profile during the preselected time interval. An encoder arrangement is employed for detecting the actual time base positional profile of the servo output unit during the given time interval so that an analog signal generally proportional to the algebraic difference between the actual and desired time base positional digital profile can be created at various times during the time interval. The control reference signal is then created by a summing circuit as a function of both the first and second analog signals the first of which is proportional to a desired velocity and the second of which is proportional to the algebraic difference between a desired and actual position of the servo output unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.