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Integral criteria for optimal tuning of PI/PID controllers for integrating processes
Author(s) -
Ali Ahmad,
Majhi Somanath
Publication year - 2011
Publication title -
asian journal of control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.769
H-Index - 53
eISSN - 1934-6093
pISSN - 1561-8625
DOI - 10.1002/asjc.278
Subject(s) - pid controller , setpoint , control theory (sociology) , robustness (evolution) , maxima and minima , minification , control engineering , computer science , engineering , mathematics , mathematical optimization , control (management) , temperature control , artificial intelligence , mathematical analysis , biochemistry , chemistry , gene
Tuning formulas for PI/PID controllers for integrating processes are presented in this paper. The controller parameters are obtained by minimizing various integral performance index. Bacterial Foraging strategy, a new entrant to the family of evolutionary algorithms is used for minimization to avoid the local minima in the optimization procedure. A setpoint filter is used to reduce the large overshoot, and a significant improvement in control performance is obtained when compared to recently reported methods. Simulation results for an assumed perturbation in the plant delay are also given to illustrate the robustness of the proposed controller design method. Copyright © 2010 John Wiley and Sons Asia Pte Ltd and Chinese Automatic Control Society