Study On An FPGA-based Intelligent Electric Actuator Controller

FPGA, which has the advantages of repeating in-system-programmability, short development period, parallel processing, high processing speed, high degree of integration and reliability, is widely used in many fields such as digital signal processing, image processing, industrial control and communication. Design a controller based on FPGA can integrate the interfaces and logic devices into one chip, thus its volume , wiring and power dissipation are reduced and its reliability enhanced. Its repeating in-system-programmability makes the extention and alteration easy. The running speed of complicated control algorithms implemented on FPGA is very fast and can meet the real time industrial control due to its capability of parallel processing and fast processing speed.At first, according to the demands of industrial control, a universal industrial controller based on EP1C6T144C8 is designed, including the digital input and output channels, analog input and output channels and RS-232 serial port, which are common in industrial control. The control of each part are programmed in VHDL language. Secondly, an electric actuator position control system based on FPGA is design, by adding other parts, such as the interlock drive and host computer, to the controller design above. The integration of the system is completed using VHDL language in Quartusâ…¡. Various kind of intelligent control algorithm can be embedded in the system so as to study the control performances of the algorithm. At last, a The Sliding Mode Fuzzy control algorithm is implemented on FPGA, utilizing synchronous design technology and modular design method. The Sliding Mode Fuzzy control algorithm can run fast on FPGA, thus meet the high speed control in industrial control. Meanwhile, the algoritm can increase the robustness and accuracy of the electric actuator control system and decrease the chattering. The design of this thesis has some application value in industrial control.