Ahmed, Hafiz

Ayalew, Beshah

Ríos, Héctor

Wang, Yongqiang

This article provides a comparative study of four different second-order sliding-mode (SOSM) differentiators proposed in the literature, namely, standard higher-order sliding-mode (HOSM) differentiator, non-homogeneous HOSM differentiator, uniform robust exact differentiator and hybrid fixed-time differentiator. Based on sliding-mode principles, these differentiators can provide robust exact differentiation with finite/fixed-time convergence. First, a comprehensive summary of the different methods is provided. Then, the differentiators are applied experimentally to estimate the states of a Van der Pol oscillator. Through experiments, it is shown that the different differentiators outperformed a Kalman-like observer, high-gain differentiator and extended Kalman filter. Finally, some suggestions are provided on the selection of SOSM differentiators for various applications.<br/

Coventry University Pure Portal

Second-Order Sliding-Mode Differentiators: An Experimental Comparative Analysis Using Van der Pol oscillator

Hafiz Ahmed

Héctor Ríos

Beshah Ayalew

Yongqiang Wang

Crossref

International Journal of Control

Second-order sliding-mode differentiators: an experimental comparative analysis using Van der Pol oscillator

https://pure.coventry.ac.uk/ws/files/13611945/ARAW_IJC_Final_2018.pdf

Second-Order Sliding-Mode Differentiators: An Experimental Comparative Analysis Using Van der Pol oscillator

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Coventry University Pure Portal

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