热连轧液压活套不确定系统的滑模控制

针对一类多输入多输出热连轧液压活套不确定系统设计了滑模控制器.首先利用特殊线性变换将原不确定系统化成标准形式,然后基于Lyapunov函数方法和线性矩阵不等式(LMI)技术给出了滑模面函数,根据滑模到达条件设计了一种新的控制策略,并且给出了理论性证明.最后仿真结果表明,该控制器可使活套控制系统获得较好的控制效果,有效地提高热轧带钢精轧机活套系统的控制精度,并使活套系统迅速达到平衡稳定状态.该控制器具有很强的鲁棒性能,非常适合于复杂的活套系统.

Sliding Mode Control for Hydraulic Looper Uncertain System in Hot Strip Mills

For a class of multi-input multi-output (MIMO) hydraulic looper uncertain system in hot strip mills, a sliding mode controller was designed. First, the original uncertain system was turned into a standard model based on a particular linear transformation. Then, the sliding mode surface function was obtained by applying Lyapunov function approach and the linear matrix inequality (LMI) technique, and a novel sliding mode control (SMC) strategy was proposed and theoretically proved based on the sliding mode reaching conditions. Simulation results demonstrated that the proposed algorithm get much better control performance, and make the looper system come to a stable equilibrium state quickly. What's more, the control accuracy for looper system of hot strip finishing mills was also improved. This kind of control action has robust performance for looper and tension, which is suitable for the complex looper systems.