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Korean Journal of Chemical Engineering, Vol.21, No.5, 935-941, 2004
An Energy Effective PID Tuning Method for the Control of Polybutadiene Latex Reactor Based on Closed-loop Identification
The PBL(polybutadiene Latex)production process is a typical batch process. Changes of the reactor characteristics due to the accumulated scaling with the increase of batch cycles require adaptive tuning of the PID controller being used. In this work we propose a tuning method for PID controllers based on the closed-loop identification and the genetic algorithm (GA) and apply it th control the PBL process. An approximated process transfer function for the PBL reactor is obtained from the closed-loop data by using a suitable closed-loop identification method. Tuning is performed by GA optimization in which the objective function is given by ITAE for the setpoint change. The proposed tuning method showed good control performance in actual operations.
[References]
- Arpornwichanop A, Kittisupakorn P, Hussain MA, Korean J. Chem. Eng., 19(2), 221, 2002
- Astrom KJ, Hagglund T, "PID Controllers: Theory, Design & Tuning," 2nd Ed., IAS Research Triangle Park, NC, 1995
- Chen D, Seborg DE, Ind. Eng. Chem. Res., 41(19), 4807, 2002
- Chin IS, Chung JW, Lee KS, Korean J. Chem. Eng., 19(2), 213, 2002
- Choi SH, Manousiouthakis V, Korean J. Chem. Eng., 19(2), 227, 2002
- Forssell U, Ljung L, Automatica, 35(7), 1215, 1999
- Goldber DE, "Genetic Algorithms in Search, Optimization and Machine Learning," Addison-Wesley, 1989
- Hjalmarsson H, Gevers M, Debruyne F, Automatica, 32(12), 1659, 1996
- Larimore WE, "Canonical Variate Analysis in Identification, Filtering and Adaptive Control," Proc. of the 29th Conference on Decision and Control, CDC 90, HI, 596, 1990
- Ljung L, McKelvey T, Signal Process., 52, 209, 1996
- Pramod S, Chidambaram M, Bioprocess Eng., 22, 185, 2000
- Seborg DE, Edgar TF, Mellichamp DA, "Process Dynamics and Control," John Wiley & Sons, New York, 272, 1989
- Sung SW, Lee TY, Park S, AIChE J., 48(6), 1358, 2002
- van den Hof PMJ, "Closed-loop Issues in System Identification," Proceedings of the 11th IFAC Symposium on System Identification, Fukuoka, Japan, 4, 1651, 1997
- Vanoverschee P, Demoor B, Automatica, 30(1), 75, 1994
- Verhaegen M, Automatica, 30(1), 61, 1994
- Verhaegen M, Dewilde P, Int. J. Control, 56, 1187, 1992
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