
doi: 10.3390/math8020185
A novel switching-differentiator (SD) that can asymptotically track the time derivative of time-varying signal was previously proposed. This paper extends the previous SD to estimation of higher-order time derivatives. This study shows that higher-order time-derivatives can be estimated by connecting multiple SDs in cascade form. By successive applying the generalized Barbalat’s lemma, all higher-order tracking errors also approach zeros asymptotically. To illustrate the performance of the proposed higher-order switching differentiator, simulations were performed for estimating higher-order time-derivatives of a signal.
differentiator-based controller, approximation-free, nonautonomous, QA1-939, uncertain nonlinear system, Mathematics
differentiator-based controller, approximation-free, nonautonomous, QA1-939, uncertain nonlinear system, Mathematics
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