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

By Cheng-Ching Yu

Recognising some great benefits of greater keep an eye on, the second one version of Autotuning of PID Controllers offers basic but powerful tools for bettering PID controller functionality. the sensible problems with controller tuning are tested utilizing a number of labored examples and case reports in organization with in particular written autotuning MATLABВ® courses to bridge the distance among traditional tuning perform and novel autotuning methods.

The broadly revised moment variation expands and refines on vital paintings within the ubiquitous PID kind of keep watch over with fabric covering:

  • Derivation of analytical expressions for relay suggestions responses with tabulated effects for simple reference.
  • The use of shapes of relay responses to generate info for more suitable closed-loop keep an eye on and function evaluate.
  • The functions of autotuning to multiple-model-based circumstances for dealing with strategy nonlinearity.
  • The use of suggestions shapes to generate details for functionality evaluate.
  • The impression of imperfect actuators on controller performance.

Autotuning of PID Controllers is greater than only a monograph, it really is an self reliant studying software acceptable to the paintings of educational keep an eye on engineers and in their opposite numbers in trying to find better strategy keep watch over and automation.


Comments at the first edition:

This publication is written in a manner which not just makes it effortless to appreciate yet can be beneficial to these drawn to or operating with PID controllers. Assembly Automation

The publication should be worthy to brands and clients of keep an eye on gear, and in addition to researchers within the box of computerized tuning. Automatica

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Extra info for Autotuning of PID Controllers: A Relay Feedback Approach

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The downward or descending trend can be obtained by reversing the sign of the output (  yn ). 2, the individual expressions, for relay feedback responses of first-, second- and third-order systems contain terms similar to those of the corresponding equations for the step responses, except that they differ only in weighting factor ( 2 / (1 + e  Pu / 2 ) ). If we compare the terms of the expressions of the relay feedback response with those of step response of a process, we see that they differ by a weighting factor of 2 / (1 + e  Pu / 2 ) .

Sci. 1973;28:1707. 10. Chang RC, Shen SH, Yu CC. Derivation of transfer function from relay feedback systems. Ind. Eng. Chem. Res. 1992;31:855. 11. Li W, Eskinat E, Luyben WL. An improved autotune identification method. Ind. Eng. Chem. Res. 1991;30:1530. 12. Wang QG, Hang CC, Zou B. Low-order modeling from relay feedback. Ind. Eng. Chem. Res. 1997;36:375. 13. Majhi S, Atherton DP. Auto-tuning and controller design for processes with small time delays. IEE Proc. Control Theory Appl. 1999;146(3):415.

Optimum settings for automatic controllers. Trans. ASME 1942;12:759. 6. Tyreus BD, Luyben WL. Tuning PI controllers for integrator/dead time processes. Ind. Eng. Chem. Res. 1992;31:2625. 7. Luyben WL. Tuning proportional–integral–derivative controllers for integrator/dead time processes. Ind. Eng. Chem. Res. 1996;35:3480. 8. Rivera DE, Morari M, Skogestad S. Internal model control 4 PID controller design. Ind. Eng. Chem. Proc. Des. Dev. 1986;25:252. 9. Seborg DE, Edgar TF, Mellichamp DA. Process dynamics and control.

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