Mathematical Model of a Wide Class Memory Oscillators
DOI:
https://doi.org/10.14529//mmp180209Keywords:
mathematical model, Cauchy problem, heredity, derivative of fractional order, finite-difference scheme, stability, convergence, oscillograms, phase trajectoryAbstract
A mathematical model is proposed for describing a wide class of radiating or memory oscillators. As a basic equation in this model is an integro-dierential equation of Voltaire type with dierence kernels - memory functions, which were chosen by power functions. This choice is due, on the one hand, to broad applications of power law and fractal properties of processes in nature, and on the other hand it makes it possible to apply the mathematical apparatus of fractional calculus. Next, the model integro-differential equation was written in terms of derivatives of fractional Gerasimov - Caputo orders. Using approximations ofoperators of fractional orders, a non-local explicit nite-dierence scheme was compiled that gives a numerical solution to the proposed model. With the help of lemmas and theorems, the conditions for stability and convergence of the resulting scheme are formulated. Examples of the work of a numerical algorithm for some hereditary oscillators such as Duffing, Airy and others are given, their oscillograms and phase trajectories are constructed.
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