PAPER MACHINE CONTROL METHOD, CONTROL DEVICE, PROGRAM AND STORAGE MEDIUM

WIPO Patent Application WO/2004/072367

A1

A paper machine control device capable of preventing by means of a simple and low-cost configuration problems such as hunting by mutual interference between a retention control and an in-paper ash content control even when the both controls are performed at a short control frequency in a paper machine, and controlling a retention and an ash content with a good accuracy A retention and an in-paper ash content in at least wet part (2a) are controlled by an automatic control system (3) in a papermachine (1). This automatic control system (3) comprises a feedback loop for automatically controlling the retention, a feedback loop for automatically controlling the in-paper ash content, and a non-interference control unit (30) incorporated between the both feedback loops so as to cancel out effects by the mutual interference between the both feedback loops.

MORI YOSHITATSU (JP)
IMAI NAOKI (JP)
HARA YOSHINOBU (JP)
NISHIMURA MICHIAKI (JP)
HIRATA YOSHIHIKO (JP)
TSUCHIDA HIROSHI (JP)
TAKIYAMA YOSHIHIRO (JP)
SOMA HARUKO (JP)

PCT/JP2004/000753

August 26, 2004

January 28, 2004

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OJI PAPER CO (JP)
MORI YOSHITATSU (JP)
IMAI NAOKI (JP)
HARA YOSHINOBU (JP)
NISHIMURA MICHIAKI (JP)
HIRATA YOSHIHIKO (JP)
TSUCHIDA HIROSHI (JP)
TAKIYAMA YOSHIHIRO (JP)
SOMA HARUKO (JP)

D21F7/00; D21F1/66; D21G9/00; G05B11/32; G05D21/00; (IPC1-7): D21F7/00

JPH02160992A	1990-06-20
JPH10325092A	1998-12-08
JPH03161589A	1991-07-11
EP0651092A1	1995-05-03

Tani, Yoshikazu (Akasaka 2-chome Minato-ku, Tokyo, JP)

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