On the stability of stationary regimes in a distributed autovibration system with external feedback

A numerical investigation of the distributed autogenerator stationary state stability is described. It was shown that the realization of stable stationary excitation of resonance frequency vibrations strongly depends on the normalized non-linear amplifier length (l). At small l-values such a regime is unstable, but with increasing of this parameter the autovibration system becomes stable. Linear characteristics of stationary regime instability are found. It was shown that in the considered range of dynamic system non-equilibrium parameter changes two stationary generation regimes on different frequencies correspond to the same autogenerator transmitting characteristics. 15 refs.; 7 figs.; 1 table. (author)