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2013, vol. 61, iss. 1, pp. 7-20
New tuning formulae for the PI controller applied to processes with integral action
University of Belgrade, Faculty of Electrical Engineering
Energy efficiency Improvement of Hydro and Thermal power plants in EPS by development and implementation of power electronics based regulation and automation equipment (MESTD - 33020)

Keywords: process control; constrained optimization; process identification; tuning; PI controller
A new model Gm(s), defined by four measurable parameters (ultimate gain, ultimate frequency, amplitude of ultimate oscillation and dead time,) is obtained from the tangent to the Nyquist curve at the critical point. This model represents the generalization of the Ziegler-Nichols process dynamics characterization method for a large class of stable, integrating and unstable processes Gp(s). In the present paper, by applying the time and amplitude scaling technique to the model Gm(s), new tuning formulae are developed for the PI controller. These tuning formulae guarantee almost optimal performance/robustness tradeoff for a large class of processes with integral action.
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article language: Serbian
document type: Original Scientific Paper
DOI: 10.5937/vojtehg61-2504
published in SCIndeks: 05/03/2013
peer review method: double-blind