RT Journal Article T1 On Fractional PIlambda Controllers: Some Tuning Rules for Robustness to Plant Uncertainties A1 Monje Micharet, Concepción Alicia A1 Calderón, Antonio J. A1 Vinagre, Blas M. A1 Chen, Yangquan A1 Feliu, Vicente AB The objective of this work is to find out optimum settings for a fractional PIlambda controller in order to fulfill three different robustness specifications of design for the compensated system, taking advantage of the fractional order, lambda. Since this fractional controller has one parameter more than the conventional PI controller, one more specification can be fulfilled, improving the performance of the system and making it more robust to plant uncertainties, such as gain and time constant changes. For the tuning of the controller an iterative optimization method has been used, based on a nonlinear function minimization. Two real examples of application are presented and simulation results are shown to illustrate the effectiveness of this kind of unconventional controllers. PB Kluwer Academic Publishers SN 0924-090X YR 2004 FD 2004-12-01 LK https://hdl.handle.net/10016/39060 UL https://hdl.handle.net/10016/39060 LA eng NO This work has been partially supported by the Spanish Research Grant 2PR02A024 (Junta de Extremadura). DS e-Archivo RD 17 jul. 2024