Rolling mill gap adjustment method based on PI feedback of strip thickness error
The rolling mill gap adjustment method based on PI feedback of strip thickness error is proposed to address the issue of unknown fluctuations in the rolling mill stiffness coefficient affecting the accuracy of strip thickness control.Firstly,the rolling mill bounce equation,hydraulic roller gap adjustment dynamic equation,and dynamic equation from rolling mill gap setting value to strip thickness outlet value are established;Secondly,the thickness of strip exit and the rolling pressure are obtained through a thickness gauge and a pressure gauge.Then,a setting value of the rolling mill gap is designed based on the PI feedback of the strip thickness error,meanwhile the proportional feedback gain coefficient and the integral feedback gain coefficient were brought in one-parameter design.Finally,the setting value of rolling mill gap is input into the hydraulic roller gap adjustment system of the rolling mill to adjust roller gap,it ultimately forms a complete set of rolling mill gap adjustment method.The method can improves pre-set accuracy of rolling parameters,and greatly reduces the influence of impact of rolling mill stiffness coefficient on the accuracy of strip thickness control,which improve the accuracy of the strip thickness.
thickness controlroller gap adjustmentrolling mill stiffness coefficientPI feedback
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