RESEARCH ON DISSOLVED OXYGEN CONTROL SYSTEM IN WASTEWATER TREATMENT BASED ON FUZZY PID CONTROL

Aiming at the problem that the dissolved oxygen content in the sewage treatment system fluctuates greatly and is difficult to control, a PID-based controller design method is proposed, and the controller parameters are optimized according to the structure and characteristics of the simulation network. The PID controller based on simulation can adjust PID control parameters online according to the system state, keep the system error within a small range, and quickly restore the system to a stable state when the system is disturbed. Taking the dissolved oxygen content as the control object, a large number of simulation studies have been carried out on PID controllers. The simulation results show that the system based on the fuzzy control strategy has better adaptability, and its control quality is better than that of the conventional PID controller.