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对热连轧动态设定型自动厚度控制控制系统模型进行理论分析,由于厚度控制系统复杂,工作环境恶劣,精确的数学模型难以建立。针对工程实际,提出一类基于的鲁棒预测控制算法,在系统存在参数摄动和扰动的情况下仍能满足期望的性能指标,实现了多目优化标控制,提高控制系统的性能,并且使得控制输入满足硬约束条件,防止控制输入过大对轧机系统造成损害。由于所得结果以非线性矩阵不等式形式给出,采用锥补线性化思想将非线性矩阵线性化,求解线性矩阵不等式,根据其可行解求解控制率。根据实际参数和经验数据进行仿真实验,结果表明该方法的有效性和较好的控制性能。
The dynamic model of automatic control system for hot strip rolling is theoretically analyzed. Because of the complicated thickness control system and poor working environment, accurate mathematical model is difficult to set up. Aiming at engineering practice, a robust control algorithm based on robust predictive control is proposed. It can still meet the expected performance under the condition of perturbation and disturbance of parameters, and achieves the multi-objective optimization of standard control and improves the performance of control system, Control inputs satisfy hard constraints to prevent damage to the mill system caused by oversized control inputs. Since the results are given in the form of nonlinear matrix inequalities, the nonlinear matrix is linearized by the idea of cone-complementary linearization, the linear matrix inequalities are solved, and the control rate is solved according to its feasible solutions. According to the actual parameters and empirical data, the simulation results show that the method is effective and has better control performance.