Process control having improved combination of feedforward feedback control
US4951191A · kind A · utility
15Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 24, 1988 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Jun 24, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B13/0205
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A process controller includes a change fetch circuit for fetching a change in feedforward controlled variable due to a variation in load, and an auto-tuning control circuit for performing auto-tuning for mis-matching of the feedforward control, in accordance with a compensation variable obtained by multiplying a ratio of an adjusted output signal of a feedback control system corrected by the feedforward control to the feedforward controlled variable, with the change in feedforward controlled variable, to determine an optimal next feedforward controlled variable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.