基于控制参数化的注塑工业过程最优反馈控制方法

In this paper, an optimal tracking control problem of melt flow velocity in the injection molding process is studied, and a design method of computational optimal feedback controller based on control parameterization is proposed to solve the optimal control problem arising in the injection molding process. Firstly, a mathematical model of a dynamic process system is established for the injection molding process, and the dynamic optimal tracking control problem of flow front position of molten polymer in injection molding machine is proposed. Secondly, a multi-level feedback control law is designed, and the control feedback kernel is parameterized by the control parameterization method. The controller design problem is transformed into a sequential optimal parameter decision problem. Then, the explicit expression of the gradients of the objective function and constraints with respect to the parameters of the decision variables are obtained by using the state sensitivity analysis method, and then the nonlinear programming algorithm is used to solve the optimization problem efficiently. Finally, the feasibility and the effectiveness of the proposed design method of optimal feedback controller are verified by numerical experiments.