Numerical behavior of the variable-order fractional Van der Pol oscillator

In this article, we investigate the behavior of a Van der Pol oscillator based on the variable-order Caputo fractional derivatives. After variable-order fractional modeling, we discretize the obtained equations using the Legendre–Gauss–Lobatto points and employ Lagrange interpolating functions. An a...

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Vydáno v:Journal of computational science Ročník 74; s. 102174
Hlavní autoři: Ramroodi, N., Ahsani Tehrani, H., Noori Skandari, M.H.
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier B.V 01.12.2023
Témata:
Lagrange interpolating polynomial
Legendre–Gauss–Lobatto points
Van der Pol oscillator
Variable-order fractional derivative
Legendre–Gauss–Lobatto points
Van der Pol oscillator
Lagrange interpolating polynomial
Variable-order fractional derivative
ISSN:1877-7503
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Shrnutí:In this article, we investigate the behavior of a Van der Pol oscillator based on the variable-order Caputo fractional derivatives. After variable-order fractional modeling, we discretize the obtained equations using the Legendre–Gauss–Lobatto points and employ Lagrange interpolating functions. An algebraic system is gained that approximates the variables and their fractional derivatives. Also, an approach is suggested to calculate the differentiation matrix related to the variable-order Caputo fractional derivative. Moreover, an algorithm is presented for solving the variable-order Caputo fractional Van der Pol equation on large time-interval. Numerical simulations are provided to represent the applicability of the suggested method and to see the treatment of variable-order Caputo fractional Van der Pol oscillator.
ISSN:1877-7503
DOI:10.1016/j.jocs.2023.102174