史密斯预估补偿控制与PID控制的比较研究

比较了两种工业过程控制中的控制器,PID控制器和史密斯预估补偿控制器.介绍了四种PID参数的整定方法,分别为试凑法确定PID调节参数、Ziegler-Nichols参数整定方法、最优PID整定算法、运用Matlab/simulink中的NCD Outport(非线性控制设计输出端口模块)模块对PID参数进行最优整定.史密斯预估补偿控制器主要用于工业控制中的大延时系统控制,以提高系统的阶跃响应性能.在理论上,史密斯预估补偿控制器提供了一个有效的方法来提高控制效果.运用Matlab/Simulink仿真方案对前述两种控制方法进行了仿真比较,结果表明,在有较大延时情况下,史密斯预估补偿控制能获得比PID控制更好的结果.

Investigation on comparison between the SMITH predictive compensation control and the PID control

Two kinds of controller used in industrial process control were compared. Four methods for tuning the parameters of the PID controller were presented. The Smith predictive compensation controller was mainly used in the long-time delay industrial process to improve the step response performance of the system. In theory, the Smith predictive compensation controller could provide an effective way to improve the control effect. The Matlab/Simulink was employed to compare the two fore-mentioned controllers. The outcome indicates that under the condition of a long-time delay, the Smith predictive compensation controller can achieve better results than those achieved by the PID controller.