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A Simple Method to Design Robust Fractional-order Lead Compensator
Sharad P. Jadhav,Rajan H. Chile,Satish T. Hamde 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.3
This paper proposes a generalized and simple analytical method to design robust fractional-order leadcompensator (FOLC). The aim of the proposed fractional-order compensator is to adjust the system’s Bode phasecurve to achieve the required phase margin at a specified frequency. The structure selected in this paper is moregeneralized and novel. It is easy to implement for a real world application. The method proposed is frequencydomain and parameters of fractional compensator are selected from the plant information and specifications. ThisFOLC satisfies the specifications on static error constant, Kss, gain crossover frequency, wc and phase margin, φm. The applicability of the proposed method is demonstrated with illustrative examples. From the simulation resultsobtained, it is observed that FOLC gives robust and stable performance as compared to existing FOLC and integerorderlead compensator (IOLC).