Research Of Port Water Supply System With Constant Pressure Based On Data Driven Control Method

China's water resources are very scarce, because of the automation of water supply system has long been lagging behind the West,water supply equipment and pipelines are relatively obsolete, a lot of water is wasted. Thereby increasing the automation of water supply systems and saving limited water resources has become an important topic of the times. Water supply system with constant pressure based on conversion technology is not only better able to maintain a constant pressure, but it also can save energy. Therefore, the research has great theoretical and practical significance. This paper analyzes the principle of the port water supply system,and we design its control system. At the same time,we introduced the simultaneous switching technology and the GPRS remote communications technology in this system.As the controlled object of port water supply system is a high time, time delay, parameter time-varying nonlinear systems, we can not establish a precise mathematical model. At the same time when the water requirement is large, the process of the frequency power supply switch will produce over-voltage and over-current shocks,therefore,this paper adopts dual-close-loop control by combining the no model adaptive control algorithm and switching technique. We can achieve stability on port pressure water supply system. In order to facilitate remote control, we use GPRS communication technology instead of traditional cable and data radio as a medium of communication to enhance the automation of the whole control system. Theoretical analysis and simulation results show that this control strategy can not only improve the stability and reliability of the port pressure water supply system,but also can achieve frequency conversion. Based on theoretical analysis, we design the hardware and software of port water supply system with constant pressure. We design the control circuit, the signal acquisition circuit, synchronous switch circuit, GPRS communication module circuit in the hardware. In the software we adapt modular idea, and we give the main function modules of the detailed flow chart,including the part of constant pressure water supply, GPRS communications, supervisory control and synchronous switching.