【摘要】 经典控制论中,对纯滞后生产过程的控制一般采用Smith预估控制算法;Smith预估控制算法基于系统辨识,由辨识结果Gp(s)e-τs设计预估控制补偿器Gp(s)(1-e-τs);采用Padé算法的一阶近似式逼近e-τs,利用S7-200 PLC实现Gp(s)(1-e-τs);实践证明,控制效果优于分段PID的控制效果;对整个实现过程给予阐述。更多还原

【Abstract】 According to the classical control theory,generally make use of Smith predictive control algorithm which is based on system identification theory to control the pure time delay productive process.Through the algorithm,get the result that is Gp(s)e-τs,on which can design a control compensator-Gp(s)(1-e-τs).This paper get approximate value which will illimitably close to e-τs through Padé approximant algorithm,then on S7-200 PLC achieve the funtion of control compensator-Gp(s)(1-e-τs).Through some project applications,the control model get the more perfect result than separated PID control model.更多还原