Process control having improved combination of feedforward feedb

Details Process control having improved combination of feedforward feedb Process control having improved combination of feedforward feedb

1988-06-24

1990-08-21

Smith, Jerry

Boots, shoes, and leggings

364164, 364157, 364162, G05B 1302, G06F 1546

Patent

active

049511912

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.

REFERENCES:
patent: 4489376 (1984-12-01), Putnam
patent: 4563735 (1986-01-01), Hiroi et al.
patent: 4663703 (1987-05-01), Axelby et al.
patent: 4698745 (1987-01-01), Hiroi et al.
patent: 4714988 (1987-12-01), Hiroi et al.
patent: 4761595 (1988-08-01), Goor

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