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1 Acta Mechanica et Automatica

1 2022

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Numerical criterion for the duration of non-chaotic transients in ODEs

Szczebiot Ryszard, Kaczyński Roman, Gołdyn Leszek

Acta Mechanica et Automatica

2022

Vol. 16, no. 4

388--392

The paper proposes an original numerical criterion for the duration analysis of non-chaotic transients based on the Euclidean norm of a properly defined vector. For this purpose, transient trajectories, prior to their entering a small neighbourhood of the limit cycle, are used. The vector has been defined with its components constituting the lengths of the sections, which connect the origin of the coordinate system with appropriately determined transient trajectory points. The norm of the vector for the analysis of non-chaotic transients has also been applied. As an assessment criterion of transients, the convergence of the norm to small neighbourhood of the limit cycle with the assumed accuracy is used. The paper also provides examples of the application of this criterion to the Van der Pol oscillators in the case of periodic oscillations.