The Research Of Embedded Intelligent Controller Based On Internet

With the development of the computer science and network technology, great changes have taken place in the automatic control field. It is the trend that the control systems will become more open to the network. As one of the most popular technologies in local area network, Ethernet is widely used in the industrial automation field and process control field.Based on FPGA platform and advanced control algorithm, the thesis presents the design of an embedded intelligent controller. Using the intelligent controller will greatly improve the level of digitalization, informatization, networking of the system. The main contributions of the thesis include:(1) The applications, characteristics and development of embedded system technology, and the development of common control strategies in control engineering were discussed and analyzed. Solid foundations were laid for the design of the embedded controllers and the realization of intelligent control methods through the analysis of the intelligent control strategies.(2) The thesis discussed and analyzed the method of hardware/software co-design. Through researching FPGA design kits and relevant IP cores of Xilinx, we designed a control system platform of intelligent controller which based on FPGA. It provided the hardware platform for the embedded applications.(3) XilLib Net was analyzed, rewritten and applied to the MicroBlaze Processor. Driver of network control module and program of embedded web server were completely written. C source code was written for the neural network control algorithm and mb-gcc, mb-as, mb-ld was used for compiling, assembling and program debugging. The target code was downloaded to the embedded controller and the software design of the embedded intelligent controller was completed, and realized the remote control through the Internet in the end.(4) Experiments of three-tank water control system were conducted using the embedded intelligent controller. The experiment results show that the embedded controller could achieve rapid balance control of the water, and have better control performance than traditional PID controller.