文章基本信息

标题：Should we forget the Smith Predictor?
本地全文：下载
作者：Chriss Grimholt Sigurd Skogestad
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2018
卷号：51
期号：4
页码：769-774
DOI：10.1016/j.ifacol.2018.06.203
语种：English
出版社：Elsevier
摘要：AbstractThe PI/PID controller is the most used controller in industry. However, for processes with large time delays, the common belief is that PI and PID controllers have sluggish performance, and that a Smith predictor or similar dead-time compensator can give much improved performance. We claim in this paper that this is a myth. For a given robustness level in terms of the peak sensitivity (Ms), we find that the performance improvement with the Smith predictor is small even for a pure time delay process. For other first-order processes a PID controller is generally better for a given robustness level. In addition, the Smith Predictor is much more sensitive to time delay errors than pi and pid controllers.
关键词：KeywordsPIPIDSmith PredictorPerformance-Robustness trade-off