材料期刊网

After Smith Predictor being used to laminar cooling system, the control law for integral regulators is introduced. New notion of plate sample length is given evading the delay time varying with the roll table speed. It is found that the integral algorithm is more controllable for system regulating process and has better steady-state precision. Compared with the traditional control strategies the new control law has faster response speed and higher steady-state precision. The controller can regulate in shorter time and response faster than routine controller and it can effectively eliminate the oscillatory instability. Owing to its easy realization and high stability, it has been applied in a plate mill. The accuracy of finish cooling temperature can be controlled in ±10℃.