带Smith预估器的预测PID控制器的设计

Design of Predictive PID Controller with Smith Predictor

设计了一种基于广义预测的思想的PID参数整定的改进算法。利用阶梯式控制策略,有效地减小了参数整定中的计算复杂性,并能更方便地通过阶梯因子对所得PID控制器的控制性能进行调节。另外,文中对大延时系统的参数整定误差进行了分析,并通过引入Smith预估器改善了这类系统的参数整定效果。仿真实例说明了上述算法的有效性。

This paper designs a turning algorithm of PID parameters based on the idea of GPC. By using stair-like tactics, the calculation complexity of parameter tuning is reduced effectively, and it is easier to regulate the quality of the PID controller by changing stair factor. In addition the error in parameter turning for the system with big delay is analyzed, and the tuning effect is improved by introducing Smith predictor. The simulation results show the effectiveness of the proposed method.