Boots – shoes – and leggings
Patent
1997-03-14
1998-10-20
Gordon, Paul P.
Boots, shoes, and leggings
162252, 162DIG10, G06F 1900
Patent
active
058256539
ABSTRACT:
A method for continuous overall regulation of a former of a paper or board machine or equivalent in which a physical fluid flow model of the drainage and the flow state of the pulp suspension flow is formed. The model is solved by making use of the data on the geometry of the former and initial and boundary conditions necessary for a solution to the model. The difference between the simulated state, which has been obtained as the solution of the physical flow model, and the state adopted as the target is determined as the cost function, wherein the target state is determined by means of the quality requirements of the paper and possibly by means of the costs of operation and the runnability of the paper machine. The cost function is optimized and, thus, optimal regulation values and set values are obtained for the regulation devices and/or actuators of the former in view of the given cost function. After the optimization has been carried out in the preceding stage, the former's regulation devices and/or actuators are given new optimal regulation and set values.
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Hamalainen Jari
Huovila Jyrki
Nyberg Petri
Pakarinen Pekka
Garland Steven R.
Gordon Paul P.
Valmet Corporation
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