Research on wastewater treatment system based on ADRC

Considering the characteristics of the time-delay, inertia and time-varying of DO control in the wastewater treatment, and on the basis of analyzing the defects on general PID control and Fuzzy Smith-PID control, one kind of ADRC controller is proposed in the wastewater treatment control system, Through the simulation experiment and comparing with general PID and Fuzzy Smith-PID control, the result shows that ADRC control strategy has lesser adjust-time and overshoot than other two control strategies. In addition, this control strategy not only can adapt the system change commendably under different working conditions, but also has good robustness and stability existing outside interference, and then provides an effective control way of solving the problem in the time-delay and inertia system.