Abstract
In order to improve the accuracy and stability of sludge digestion tank temperature control, based on the PID control with fuzzy controller, using the fuzzy control algorithm, obtained the adjustment of PID control parameters and online self-regulation of PID controllers parameters. The simulation tests show that the fuzzy PID control system for sludge digestion tank temperature outperforms the general PID control system because of a ±1°C control accuracy, this can satisfy the requirements of temperature control of sludge digestion.
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