https://scholars.lib.ntu.edu.tw/handle/123456789/409709
Title: | Tuning of PI controllers for self-regulating processes | Authors: | Chen C.-L. Huang H.-P. Lo H.-C. |
Keywords: | Identification;IMC;Pl Controller;Tuning | Issue Date: | 1997 | Journal Volume: | 28 | Journal Issue: | 5 | Start page/Pages: | x2-327 | Source: | Journal of the Chinese Institute of Chemical Engineers | Abstract: | One simple tuning method for controlling self-regulating processes using the Proportional-Integral (PI) controllers is proposed in this article. The process dynamics are modeled as a first-order-plus-dead-time transfer function, Gp(s) = Ke-ds/(τs + 1), by any existing identification method such as the closed-loop reaction-curve method of Chen (1989, 1991). The process dynamics would be classified into three categories: lag dominant, dead-time dominant, and small dead-time, according to the relative magnitude of time constant and dead-time in the model. The PI controller settings are then determined for each of these three process characteristics by using the Internal Model Control (IMC) principle. These proposed PI controller tuning rules are: Kc = 1 1 τ/ 2 Kmax(d,0.5) (%/%) τ1 = {min{τ,6d} if d > 0.5 3 if d > 0.5 (min) Several numerical examples are given to demonstrate the effectiveness and the robustness of the proposed tuning method on a large class of self-regulating processes. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/409709 | ISSN: | 03681653 |
Appears in Collections: | 化學工程學系 |
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