The Research Of Fuzzy PID Temperature Control System Based On ARM

It's a broad application to measure and control temperature in the industry production. Especially in some industry, such as oil, chemistry, electric power, metallurgy. The temperature control directly impacts on the quality of the product and industrial production process. With the rapid development of the microelectronics technology, the embedded technology and the automatic control theory, the temperature control technology is in the trend of intelligence development.In this paper, on the basis of relavant research both at home and abroad, process control for industrial temperature control system, and aiming at the feature of bad expanD/Ability, the bad disposal of complex controlled environment and thenonsupport of fulfilling the real-time multi-tasking, an industril fuzzy PID temperature control system based on ARM is proposed. In hardware, the system adopt ARM9 embedded micro controller as the main control chip, the temperature detection module and LCD module have been designed, and the storage unit has been extended. In addition, in order to download D/Ata, system debugging and with the PC machine or device to communicate more easily, the system also design to RS232 serial port circuit, JTAG circuit and Ethernet interface circuit; In software, the kernel of embedded real-time operating system Linux was cut, configured , compiled and transplant in the final. In addition, the programming of applications of temperature detection module, D/A D/Ata acquisition module , LCD module and the control algorithm module has been design. The temperature control system with this method, overcome the shortage of traditional PLC and SCM control, The system has many advantages such as good expanD/Ability, high reliability, fast response,small size and more intelligent,etc.In this paper, the algorithm of temperature control in industrial production process has been studied, finally, fuzzy PID control was chosen as the control algorithm in this temperature control system. To the boiler steam temperature as control object, a simulation model with the temperature control system of industrial boiler steam has been established. The result show that the fuzzy PID control effectively improve the system capacity, such as nonlinear,time variability and uncertainty, get better control effect.