Control system for papermaking machine headbox

Details Control system for papermaking machine headbox Control system for papermaking machine headbox

1981-01-08

1983-02-22

Alvo, Steve

Paper making and fiber liberation

Apparatus

Automatic control

162256, 162259, 162262, 162263, 162DIG6, 162DIG11, 364471, 364568, D21F 102, D21F 106

Patent

active

043747035

ABSTRACT:
A system for the control of a paper machine headbox having sensors for the measurement of the parameters of the process and actuators of the members of the process, functionally connecting at least most of the sensors to an at least equal number of actuators via a multivariable centralized control member which makes it possible to control each actuator by the taking into account and processing of the measurement information of one or more sensors, and causing the measurement information to act on each of the sensors functionally connected to the actuators on one or more members to obtain a resultant action in which only the parameter measured by this sensor is influenced while the secondary repercussions on the outer parameters are eliminated. Another characteristic, the invention permits rapid intervention taking into account the information on the substance flow rate at the headbox, eliminating the usual disturbing influences due to the hydraulic values of the process.

REFERENCES:
patent: 3703436 (1972-11-01), Rice
patent: 3886036 (1975-05-01), Dahlin
Sidebottom, "Computer Control of Paper Making Plant", IEEE, vol. 116, No. , Oct., 1969, pp. 1755-1758.
Fellows, "Multi-Loop Anticipator Computer Control Systems", The Paper Industry, May, 1963.
"A Low-Cost Paper Machine Wet End System", The Paper Maker, Aug., 1966.
Talvio, "A Study Of Paper Machine Headbox Control System With Linear Transfer Functions", Congres. IFAC, 1966.

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