폐 루프 시간 상수를 설계 변수로 하는 비집중 제어기 설계 방법

정진희; 최진영; 이지태

HWAHAK KONGHAK, Vol.37, No.6, 844-849, December, 1999

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폐 루프 시간 상수를 설계 변수로 하는 비집중 제어기 설계 방법

A Decentralized Controller Tuning Method with One Design Parameter of the Closed-loop Time Constant

정진희, 최진영, 이지태

초록

단변수 IMC tuning 법의 확장으로 각 루프의 응답이 원하는 형태가 되는 다중 루프 제어기 설계 방법을 제안한다. 폐 루프 시간 상수에 해당하는 하나의 설계 변수로 tuning이 되어, 설계자의 부담을 최소로 할 수 있다. BLT tuning의 과도한 detuning으로 인한 매우 느린 응답과 sequential loop closing법의 비대칭적인 응답 같은 기존의 간략한 비집중 제어기 tuning법의 문제점들을 해결할 수 있다.

Extending the IMC tuning method for single variable processes, one parameter tuning method for multivariable processes where closed loops follow desired responses is proposed. With the proposed method designer''s effort can be minimized since multiloop control systems are tuned with only one design parameter of the closed loop time constant. Problems of simple decentralized controller design methods such as the very slow response by excessive detuning in the BLT method and the unsymmetrical response of the sequential loop closing method can be partially solved.

Keywords:Multiloop Control System;PID Controller;One Design Parameter Method

[References]

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[1] Luyben WL, Ind. Eng. Chem. Process Des. Dev., 25, 654 (1986)

[2] Mayne DQ, Automatica, 9, 201 (1973)

[3] Loh AP, Hang CC, Quek CK, Vasnani VU, Ind. Eng. Chem. Res., 32, 1002 (1993)

[4] Shen SH, Yu CC, AIChE J., 40(4), 627 (1994)

[5] Astrom KJ, Hagglund T, "Automatic Tuning of PID Controllers," Instrument Society of America, Research Triangle Park, North Carolina (1988)

[6] Skogestad S, Morari M, Automatica, 25, 119 (1989)

[7] Grosdidier P, Morari M, Automatica, 22, 309 (1986)

[8] Lee J, Choi JY, HWAHAK KONGHAK, 31(3), 272 (1993)

[9] Maciejowsi JM, "Multivariable Feedback Design," Addison Wesley, New York (1989)

[10] Seborg DE, Edgar TF, Mellichamp DA, "Process Dynamics and Control," John Wiley, New York (1989)

[11] Morari M, Zafiriou E, "Robust Process Control," Prentice Hall, Englewood Cliffs, NJ (1989)

[12] Doyle JC, Stein G, IEEE Trans. Autom. Control, AC-26, 1 (1981)