文章基本信息

标题：Improved PI control for a surge tank satisfying level constraints ⁎
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作者：Adriana Reyes-Lúa ; Christoph Josef Backi ; Sigurd Skogestad 等
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：835-840
DOI：10.1016/j.ifacol.2018.06.125
语种：English
出版社：Elsevier
摘要：AbstractThis paper considers the case of averaging level control, where the main objective is to reduce flow variations by using varying liquid levels. However, to avoid overfilling or emptying the tank, the liquid level needs to satisfy safety-related constraints. In the simplest case, a P-controller can be used, but may not give acceptable averaging of the flow, especially if the surge tank is relatively small. In addition, the P-controller does not allow the level setpoint to be adjusted. We propose a simple scheme with a PI-controller for normal operation and two high-gain P-controllers to avoid the liquid level constraints, which is compared with a benchmark MPC strategy. We demonstrate that the proposed method has similar performance, but with less modeling effort, less computational time and simpler tuning.
关键词：KeywordsProcess controlPIsafetyflow controlMPC