Study Of Automatic Gage Control System Of Reversible Single Stand4-high Cold Rolling Mill

There is a higher level of control technology on high-quality strip rolling on abroad. Because of behind of equip technology, there is a bigger gap between developed country and our country. While it has had a lot of achievements in this field, there are many questions to answer in practical appliance. This article’s background is some reversible single stand4-high cold rolling mill computer control system of some Steel Branch, Iron and Steel Co. Ltd. Do more research on the Hydraulic AGC.Through studying the theory of the hydraulic automatic gauge control system, the article analyzes a variety of factors which affect in the process such as the initial roll gap, rolling mill rigidity, deformation resistance such and entrance gauge.The article analyzes the single stand cold rolling mill gauge control system and study the gauge of the inner loop control (hydraulic gap control),which it also establishes the feed-back AGC, gauge meter AGC, monitor AGC and a variety of gauge compensations which consists of comprehensive cold rolling mill gauge control strategy.On the basis of the hydraulic gap control model, the article establishes monitoring AGC and Smith AGC. Matlab simulation is used to compare the control effects. The results show that Smith AGC is superior to conventional monitor AGCIn this part, generalized predictive control theory is introduced to monitoring AGC system and author does a in-depth research. The monitoring AGC system is established, and then established conventional Smith predictor monitoring AGC and monitoring based on generalized predictive control AGC model are set up according to it. Making comparison of the two controlling results through Matlab simulink, the result demonstrates that monitoring based on generalized predictive control AGC model has better robustness and the ability of anti-interference.