ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)


Cite this article as:

Zajcev V. V. The discrete van der paul oscillator: finite differences and slow amplitudes. Izvestiya VUZ. Applied Nonlinear Dynamics, 2017, vol. 25, iss. 6, pp. 70-78. DOI: https://doi.org/10.18500/0869-6632-2017-25-6-70-78

Published online: 
31.12.2017
Language: 
Russian

The discrete van der paul oscillator: finite differences and slow amplitudes

Autors: 
Zajcev Valerij Vasilevich, Federal state Autonomous educational institution of higher professional education "Samara national research University named after academician S. P. Korolev (Samara University)
Abstract: 

For sampling of time in a differential equation of movement of van der Pol oscillator (generator) it is offered to use a combination of the numerical method of finite differences and the asymptotic method of the slowl-changing amplitudes. The difference approximations of temporal derivatives are selected so that, first, to save conservatism and natural frequency of the linear circuit of self-oscillatory system in the discrete time. Secondly, coincidence of the difference shortened equation for the complex amplitude of self-oscillations in the discrete time with Euler’s approximation of the shortened equation for amplitude of self-oscillations in analog system prototype is required. It is shown that realization of such approach allows to create discrete mapping of the van der Pol oscillator and a number of mappings of Thomson type oscillators. The adequacy of discrete models to analog prototypes is confirmed with also numerical experiment. DOI: 10.18500/0869-6632-2017-25-6-70-78 References: Zaitsev V.V. The discrete van der Paul oscillator: Finite differences and slow amplitudes. Izvestiya VUZ. Applied Nonlinear Dynamics. 2017. Vol. 25. Issue 6. P. 70–78. DOI: 10.18500/0869-6632-2017-25-6-70-78  

DOI: 
10.18500/0869-6632-2017-25-6-70-78
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