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In this article, a new second order sliding mode differentiator with a variable exponent is proposed. Inspired by the classical super twisting differentiator, the dedicated differentiator allows to give a solution for reducing the effect of variable noise of sensor output measurement. To achieve this objective, the parameter α that is fixed in a super twisting differentiator is made variable in the...
This paper presents a new approach to extremum seeking control for a class of single-input-single-output nonlinear systems. With the analytic form of the performance function unknown a priori, a sliding mode observer is designed to estimate the gradient of the performance map. Based on the estimated gradient, a variable structure controller is proposed to search for the optimal operating point. We...
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