Application of New Control Strategy in Aeration System of Sewage Treatment

This paper combines the principle of two degrees of freedom with internal model PID control, and designs an internal model PID controller based on two degrees of freedom, which is applied in the aeration system of sewage treatment to control the concentration of dissolved oxygen. Through the comparison and Simulation of MATLAB, it is proved that the controller makes the actual output value of dissolved oxygen concentration track the set value rapidly, it overcomes the adverse effect caused by the model mismatch of dissolved oxygen concentration control, it optimizes the target tracking performance and anti-interference performance in the dissolved oxygen control of the aeration system, it improves the control effect, and it has important use value.