| 摘要 |
<p>PROBLEM TO BE SOLVED: To estimate with high accuracy a sheet thickness on the outlet side right below a roll without dead time and to realize control of high accuracy applying the estimation. SOLUTION: Regarding a unit 70 for estimating mass flow sheet thickness, an inlet side sheet thickness Hi measured by a sheet thickness meter 31 on the inlet side of No.i stand of tandem roller mills, an inlet side sheet velocity Vei by a sheet velocity meter 32 and an outlet side sheet velocity Voi by a sheet velocity meter 34 on the outlet side of No.i stand are inputted into a calculating unit 71, and through calculation according to hMFi =Vei .Hi /Voi+e an outlet side sheet thickness hMFi is obtained. An offset e is generated through a temperature of a roll, wear of the roll or the like. The output hMFi of the calculating unit 71 is delayed through a dead time unit 72, a tracking sheet thickness in combination of an output of a sheet thickness meter 33 and a phase is obtained, a differenceεbetween the tracking sheet thickness and the output of a sheet thickness meter 33 is taken through an adder 73, the offset e is obtained through a filter 74, and then is fed back to the calculating unit 71.</p> |
