自适应Smith预估器仿真研究  

A simulation study of an adaptive Smith predictor

作　　者：薛美盛[1] 孙德敏[1] 罗海云 

机构地区：[1]中国科学技术大学自动化系,安徽合肥230026

出　　处：《工业仪表与自动化装置》2000年第6期3-5,12,共4页Industrial Instrumentation & Automation

摘　　要：Smith预估器是一种有效的大纯滞后补偿机制 ,但它的弱鲁棒性限制了它在工程实际中的应用。本文对 Smith预估器的鲁棒性进行了仿真研究 ,并针对它的缺陷引入了自适应机制 ,即通过对被控过程的在线辨识获得满足 Smith预估器精度要求的过程数学模型 ,最后通过仿真实例给出了自适应Smith predictor is an effective compensation mechanism for large pure time delay, However, its poor robustness limits its practical application. This article makes a study of the robustness of Smith predictor from the view of system simulation. Here an adaptive mechanism is used to overcome the weak point of Smith predictor, i.e. updating the process model that Smith prdictor needs from the on line system identification. Finally, correlative simulation results are given to show the control effects of the adaptive Smith predictor system.

关 键 词：SMITH预估器 系统辨识 自适应控制 仿真 

分 类 号：TP273.21[自动化与计算机技术—检测技术与自动化装置]