Decoupling control of temperature and pressure based on expected dynamic method

Abstract

The wire and cable wire diameter extrusion system is a nonlinear system with large hysteresis and strong coupling. Conventional PID control has poor control effect on the nonlinear system and low control precision. The coupling between melt temperature and melt pressure is decoupled to eliminate the coupling. First, based on the preliminary production and experimental data, the mathematical model of the controlled object control loop is established by system identification. Secondly, according to the actual decoupling control system, the system model matrix and the decoupling controller matrix are designed, and the controller of the system is designed by the expected dynamic method to construct the decoupling control model. Finally, compared with the feedforward decoupling control, the simulation results show that the robustness and dynamic performance of the system using the expected dynamic method are significantly improved.