Simulation analysis of PID control system based on desired dynamic equation

Based on the desired dynamic equation (DDE), PID control systems were designed for common processes, higher-order processes, non-minimum phase processes and integrating processes. Also Dynamic simulation and performance robustness test were made for systems. During the design process, the approximate plant models were not needed, the PID controller parameters were achieved by choosing the desired dynamic equation (DDE) coefficients and disturbance observer parameters. Finally, control performances were compared between DDE and internal model control (IMC). The simulation results show that DDE-PID method achieved lower overshoot, shorter settling time and better performance robustness.