ZHANG Dianhua
,
WANG Bingxing
,
ZHOU Na
,
YU Ming
,
WANG Jun
钢铁研究学报(英文版)
Heat transfer was researched from a perspective of the industry application. On the basis of the first law of thermodynamics, the cooling efficiency was deduced from the change of enthalpy inside hot plate. The relationship between the cooling efficiency and its influencing parameters was regressed from plenty of data collected from the worksite and discussed in detail. The temperature profiles resulting from the online model and the model modified by regressed formulas were presented and compared. The results indicated that the control accuracy of the modified model was increased obviously.
关键词:
hot rolled plate;laminar cooling;cooling efficiency;temperature profile
ZHOU Na
钢铁研究学报(英文版)
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℃.
关键词:
;plate;laminar cooling;Smith Predictor;time delay system
