Design of IMC filter for PID control strategy of open-loop unstable processes with time delay

Title
Design of IMC filter for PID control strategy of open-loop unstable processes with time delay
Author(s)
이문용쌈쑤쪼하[쌈쑤쪼하]스클리아[스클리아]
Keywords
MODIFIED SMITH PREDICTOR
Issue Date
201202
Publisher
WILEY-BLACKWELL
Citation
ASIA-PACIFIC JOURNAL OF CHEMICAL ENGINEERING, v.7, no.1, pp.93 - 110
Abstract
A modified internal model control (IMC) filter has been proposed for the open-loop unstable process with time delay and a further IMCproportional-integral-derivative (PID) tuning rule is derived on the basis of the proposed IMC filter. Investigation of the IMC filter structure clearly demonstrates that a critically damped filter does not always provide satisfactory response and that this is probably due to lack of sufficient integral action. The conventional, critically damped filter is therefore replaced with a more general, second-order IMC filter for improved integral action. The present investigation shows that for the most unstable processes, the underdamped IMC filter provides the desired integral action and improves the closed-loop performance of the system except for the unstable processes with a strong lead term. An exhaustive simulation studies has been performed to show the advantage of the proposed method in both nominal and robust cases. By incorporating Kharitonov's theorem, closed-loop time constant (lambda) guidelines have been provided for the first-order delayed unstable process (FODUP). Copyright (C) 2010 Curtin University of Technology and John Wiley & Sons, Ltd.
URI
http://hdl.handle.net/YU.REPOSITORY/29829http://dx.doi.org/10.1002/apj.497
ISSN
1932-2135
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공과대학 > 화학공학부 > Articles
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