Lyapunov function design for finite-time convergence analysis: “Twisting” controller for second-order sliding mode realization |
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Authors: | Andrei Polyakov [Author Vitae] [Author Vitae] |
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Affiliation: | Automatic Control Department, CINVESTAV-IPN, A.P. 14-740, C.P. 07360 Mexico, D.F, Mexico |
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Abstract: | A generalization of the Zubov method of a Lyapunov function design is presented. It is based on the characteristic method application and is related to resolving the first-order partial differential equation of a special type. A successful resolution of this equation guaranties a finite-time convergence for the corresponding dynamics given by an ordinary differential equation with a discontinuous right-hand side. The suggested method is illustrated by its application to the so-called “twisting” controller stability analysis. The constructed Lyapunov function as well as its level line sections is graphically illustrated. |
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Keywords: | Lyapunov function Finite-time convergence Characteristic method High-order sliding mode |
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