Autotuning of PID Controllers: Relay Feedback Approach by Cheng-Ching Yu

By Cheng-Ching Yu

Recognising some great benefits of more suitable keep watch over, the second one variation of Autotuning of PID Controllers presents basic but powerful equipment for bettering PID controller functionality. the sensible problems with controller tuning are tested utilizing quite a few labored examples and case stories in organization with in particular written autotuning MATLAB® courses to bridge the distance among traditional tuning perform and novel autotuning methods.

The broadly revised moment version covers:

• Derivation of analytical expressions for relay suggestions responses.

• Shapes of relay responses and stronger closed-loop keep watch over and function overview.

• Autotuning for dealing with approach nonlinearity in multiple-model-based instances.

• The impression of imperfect actuators on controller functionality.

This booklet is greater than only a monograph, it really is an self sustaining studying software appropriate to the paintings of educational regulate engineers and in their opposite numbers in searching for better procedure regulate and automation.


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Additional info for Autotuning of PID Controllers: Relay Feedback Approach

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5] Papastathopoulou, H. ; Luyben, W. L. "Tuning Controllers on Distillation Columns with The Distillate-Bottoms Structure". Ind. Eng. Chern. Res. 1990, 29, 1859. [6] Shen, S. ; Yu, C. C. "Indirect Feedforward Control: Multivariable Systems". Chern. Eng. Sci. 1992, 47, 3085. [7] Sung, S. ; Park, J. ; Lee, I. B. "Modified Relay Feedback Method" Ind. Eng. Chern. Res. 1995, 29, 4133. [8] Wood, R. ; Berry, M. W. "Terminal Composition Control ofa Binary Distillation Column". Chern. Eng. Sci. 1973, 28, 707.

V ·· · ·: · . 12. R - V controlled moderate-purity distillation column. 1. 13. Proposed autotune identification procedure in moderate-purity distillation column. XB - V loop for respectively. Next, the saturation relay feedback is applied to both loops of this R- V controlled column. The MIMO autotuning is performed sequentially starting from the XD - R loop while keeping the XB - V loop on manual. 36) With this set of tuning constants, the XD - R loop is closed and the saturation relay feedback is performed on the XB - V loop.

Use of Relay Feedback Test for Automatic Tuning of Multivariable Systems," AIChE J. 1994, 40, 627. [13] Tyreus, B. ; Luyben, W. L. "Tuning PI Controllers for Integrator/Deadtime Processes," Ind. Eng. Chem. Res. 1992, 31, 2625. [14] Wang, Q. ; Hang, C. ; Zou, B. "Low-Order Modeling from Relay Feedback," Ind. Eng. Chem. Res. 1997, 36, 375. [15] Wood, R. K; Berry, M. W. "Terminal Composition Control ofa Binary Distillation Column," Chem. Eng. Sci. 1973, 28, 1707. [16] Zhuang, M; Atherton, D. P. "Automatic Tuning of Optimum PID Controllers," lEE Proc.

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