Design of Fuzzy Feed-forward Decoupling System based on FPGA
Coupling is a common phenomenon in process control system,which will decrease the performance of control systems. And whats worse,if the coupling is serious,the system can not work. Therefore,it is significant to research decoupling in the fields of control theory and project practice. Nowadays,decoupling is always implemented by software. However,this method cant satisfy the controlled plant for high speed because of bad real-time effect. Conversely,adopting the hardware deeoupiing could control the objects timely. There are many ways to realize deeoupling by hardware,FPGA is an ideal method. FPGA is a kind of field programmable logical component,which adopts the EDA technology and uses hardware describing language as an expression of logic. It has many traits,such as shorter developing periods,higher speed,upgradeable online,and is suitable for teamwork. A kind of fuzzy feed-forward deeoupling algorithm based on error is applied in this paper. On one hand,with adopting fuzzy control,the algorithm does not rely on a mathematic model,and is able close to nonlinearity. On the other hand,the speed of algorithm based on error is faster than the decoupling arithmetic based on output. Based on the analyses of a lot of coupling phenomenons,a kind of fuzzy feed-forward decoupling controller based on FPGA is designed in this paper. As a carrier with FPGA,the controller has smaller size,higher reliability,lower consumption and so on. With adopting the method of converting software idea to hardware circuit,the controller could improve the response speed. This paper chooses different plants as researching objects in the course of simulation and practice. According to the experimental results,the deeoupling effect of the controller is obvious,which provides a feasible way for the development of the decoupling teehnology.
Yongqiang Guo Kangling Fang Hongjun Zhou
Engineering Research Center for Metallurgical Automation and Detecting Technology Ministry of Education,Wuhan University of Science and Technology
国际会议
成都
英文
405-409
2008-01-01（万方平台首次上网日期，不代表论文的发表时间）