The Apply of the Adjustable Modifying Factor Fuzzy-PID Control in Constant Pressure Water Supply System

摘要

The paper revolves around the design of large and medium-size water supply system in which the adjustable modifying factor fuzzy-PID control algorithm is adopted. The design offers a solution which is targeted at two difficult problems; the first one is the closed-loop control by analysis mathematical model is not efficiently achievable, because of the complicated water pipelines and numerous curves, as well as the fact that the objects to be controlled are characterized by their high order, big lagging, close coupling, non-linear and time-varying parameters, and the second one is about the over-current and over-voltage surge produced in the process in which the variable-frequency power sources are switched to frequency stabilized power sources when multiple engines of water pumps are operated in parallel. Experimental results show that the design can enhance the stability and reliability of the frequency control water supply system.