| Fuzzy control theory is applied to the water supply system in this paper. The design of Fuzzy-PID controller of adjusting the factor of revising by oneself is introduced, which can solve the problem existing in the parameter adjustment in the courses of the traditional PID control. The water supply with constant pressure is obtained by speed-frequency variable. The system can replace the traditional water supply mode performed by a perch water tower and water pump, which effectuates the direct water pressure. The application has proved to be very effective for saving on energy and control performance is stable.
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