For hydraulic looper system in the hot strip finishing mill,the nonlinear model of looper rising up was built by studying on moment relations in rising up and valve-hydraulic cylinder model.

• 对于带钢热连轧机的液压活套系统,为了更好地控制其起套,通过对起套过程力矩关系及伺服阀-液压缸模型的分析,建立了活套起套过程的非线性模型。