Fuzzy PID Controller For Water Supply System

With the rapid development of economy and society, energy resources are seriously lacking. At the same time, the demands for quality and reliability of water supply system are increased continually. So it is inevitable tendency to design one kind of water supply system which is high reliable and saves on energy well, with the help of advanced technique of automation and control. The model of the water supply system is intrinsic nonlinear and time variant, which makes it difficult to liberalize the plant. Thus the traditional PID controller cannot adapt to the changes. To tackle this problem, we have designed an adaptive controller.The paper references a lot of Chinese and foreign literature and combines practical control requirements, and conduct theoretical study and project design on computer controlled constant pressure water supply system. The paper combines general control with fuzzy control, and brings forward an intelligent complex control scheme, and gives a detailed analysis approach and control arithmetic. This thesis compares general control with fuzzy control and analyzes them with matlab (matrix laboratory),and then applies this controller to the constant pressure water supply control, and achieves ideal control effectThe system is based on setting parameters for the pipeline pressure, the size for usage are controlled by microcomputer in operation of the pump number and motor speed, to achieve closed-loop pipe network water pressure regulator, that is to achieve constant pressure water supply.The main work of the constant pressure water supply system, the system structure and working principle.Components in the system, given the system block diagram of control principle, and this system the main function of the hardware and software, a brief introduction.According to the working principle, set of fuzzy controller, using MATLAB's Simulink simulation and verification system works. Of the control system's overall hardware architecture, and established various parts of the hardware module function, gives some typical circuit:studies of the model and the device options, on the use of various chip features and characteristics described in detail; of the system hardware design circuit, given the system hardware design charts and motor control chart.