Half order plus time delay (HOPTD) models to tune PI controllers

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• 作者：Jietae Lee ; Yongjeh Lee ; Dae Ryook Yang and Thomas F. Edgar
• 刊名：AIChE Journal
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：63
• 期：2
• 页码：601-609
• 全文大小：637K
• ISSN：1547-5905

文摘

Methods based on the first-order plus time delay (FOPTD) model are very popular for tuning proportional-integral (PI) controllers. The FOPTD model-based methods are simple and their utility has been proved with many successful applications to a wide range of processes in practice. However, even for some overdamped processes where the FOPTD model seems to be applied successfully, these empirical FOPTD model-based methods can fail to provide stable tuning results. To remove these drawbacks, a PI controller tuning method based on half-order plus time delay (HOPTD) model is proposed. Because FOPTD model-based methods can be applied to higher order processes, the proposed HOPTD model-based method can be applied to higher order processes as well. It does not require any additional process information compared to the FOPTD model-based method and hence can be used for overdamped processes in practice, complementing the traditional FOPTD model-based methods.