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AssigneeMetso Paper, Inc.
InventorsPetteri Lannes, Sami Palokangas, Jussi Alanen
Estimating the term…
In reeling up of a paper web, a continuous paper web is reeled around a reeling core/reeling cores into successive machine reels or customer rolls. The actual control system controlling the reeling up process is supplemented with a substantially separate, model-based learning fault diagnostics. The fault diagnostics in a diagnostic state detects the malfunctions in components critical in view of the operation of the reel-up by monitoring measuring, control and actuating variables of the reel-up and by comparing them with a model formed during a learning state. In a fault tolerance state the fault diagnostics actively affects the measuring, control and actuating variables to maintain the function of the reel-up, and improve operating reliability.
Method for improving the operating reliability in reeling up of a paper web, in which a continuous paper web (W) which is coming from a paper machine and/or finishing treatment of paper and whose width corresponds to the width of production or which is slit into part webs, is reeled around a reeling core/reeling cores (C1, C2) into successive machine reels or customer rolls, characterized in that in addition to the actual control system (CS) that controls the reeling up, a substantially separate model-based learning fault diagnostics (FD) is used, which fault diagnostics (FD),
The method according to any of the preceding claims, characterized in that the learning capability of the model-based fault diagnostics (FD) is based on the use of a neural network.
The method according to any of the preceding claims, characterized in that the learning capability of the model-based fault diagnostics (FD) is based on the use of fuzzy logic/computation.
The method according to any of the preceding claims, characterized in that the learning capability of the model-based fault diagnostics (FD) is based on tuning of the parameters of the function/functions contained in the mathematical model made on the process.
The method according to any of the preceding claims, characterized in that fault diagnostics is conducted for the components related to production, adjustment and measurement of the nip force between the reel (R) formed on the reel spool (C1) and the nipping cylinder (D) during the actual reeling up sequence.
The method according to any of the preceding claims, characterized in that fault diagnostics is conducted for the components related to production, adjustment and measurement of the nip force between the reel (R) formed on the reel spool (C2) and the nipping cylinder (D) during the primary reeling sequence.
The method according to any of the preceding claims, characterized in that in connection with a change sequence of the full reel (R and C1) and/or empty reeling core/cores at fixed intervals during the transfer movement of the reel/reels and/or reeling core/cores measurements are conducted to define the condition of the components conducting and/or controlling and/or monitoring the transfer movement.
Dependencies are inferred from the claim text.