| 摘要 |
PURPOSE:To correct a gain of a feedback control system to a proper value by changing the control variable of a feedforward control system to a proper value in response to the change in a material capacitance through a furnace to improve the transient control characteristic. CONSTITUTION:When a change detection section 35 detects a change part A of a steel plate 31, a switch circuit 38 is turned on, a multiplication signal between a plate width signal W attended with the change and a plate thickness signal (t) is multiplied by a multiplication section 41 with a furnace passing signal from a detector 36 via a memory section 40 and a coefficient K, the result is extracted as an external disturbance compensation signal Dn and given to a temperature regulation output signal of a temperature regulator 43 as a gain correction signal. A temperature regulation output signal with gain correction is outputted from a gain correction operating section 44. Further, the signal Dn is led to a signal converting section 45, where a static and dynamic characteristic compensation signal is obtained, a speed form signal is converted into a position type signal, which is obtained as a setting signal of flow regulators 463, 464. Thus, the regulators fetch respectively a fuel detection flow and an air detection flow, they are subjected to comparison regulation operation with a setting signal to obtain a final flow regulating output. |
