Sewage Treatment Systems Based on Fuzzy Adaptive Pid Controller
نویسندگان
چکیده
In the sewage treatment system, the dissolved oxygen concentration control, due to its nonlinear, time-varying, large time delay and uncertainty, is difficult to establish the exact mathematical model. While the conventional PID controller only works with good linear not far from its operating point, it is difficult to realize the system control when the operating point far off. To solve the above problems, the paper roposes a method which combine fuzzy control with PID methods and design a fuzzy adaptive PID controller based on S7-300 PLC .it use fuzzy inference method to achieve the online tuning for PID parameters. The control algorithm by simulation and practical application show that the system has strong robustness and good adaptability.
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