Multifrequency nonautonomic - regimes of autogenerator

The spectral relationships of the many - frequency synchronous mode of a self - sustained oscillatory upon many - frequency forcing at the principal tone are explored numerically by computer. The dependence of the amplitudes of the spectral components on the mistuning of frequencies of external forces for oscillators with a soft and rigid limit cycle is analyzed. It is shown that the behavior of the nonself sustained oscillator in the rigid limit cycle is primarily controlled by combinatorial interactions. Experiments performed with different units over the rf range rather satisfactorily confirm the analytic results.