| 摘要 |
<p>PURPOSE:To control cooling speed and coiling temp. accurately by estimating the temp. of a hot rolled steel sheet in the midway of cooling zones by the use of a speed detector, the thickness gage and thermometer on the outlet side of a finishing mill and a thermometer for coiling. CONSTITUTION:The detected values of a thickness gage 1, a thermometer 2, and a speed detector 7 are inputted via an A/D converter 10 to an arithmetic part 12 for calculating optimum solutions and an arithmetic part 13 for Karman filter. The detected value of a thermometer 3 is inputted via an A/D converter 11 to an arithmetic part for Karman filter. The temp. T1 of the steel sheet in the midway of cooling zones is estimated and a deviation dT1 is determined and is outputted to the part 12 which calculates conversion vectors for optimum control by the equationsI, II by using the deviation dT1 as well as the deviations dH1-dNH in thickness, the deviation dT1 in temp. and the deviations dDELTAt1- dDELTADELTAtN in speed determined with the Karman filter, adds the same to a reference quantity of cooling, outputs the operating quantity of cooling necessary for cooling zones 4, 5, and determines the required numbers Nu, Ne of headers to be operated thereby cooling a steel sheet 9.</p> |
