Discrete coherent amplification of oscillations by nonresonant forcing
A new mechanism of generation of oscillations in a linear forced oscillatory system is found. Natural oscillations may be generated at a "sharp" pulse (rapid variation) of the natural frequency. In this process oscillations are generated by nonresonant forcing, e.g., by the action of a constant, nonperiodic or periodic force (with driving frequency much less than the natural one). Repetitive pulses of the natural frequency result in emergence of oscillations that interfere and may give a powerful resultant output. These phenomena relate to a basis of the theory of open linear oscillatory systems.
Chagelishvili
GD
Abastumani Astrophysical Observatory, Kazbegi Avenue 2a, 380060 Tbilisi, Georgia and Space Research Institute, Street Profsoyuznaya 84/32, 117810 Moscow, Russia.
Tevzadze
AG
Gogoberidze
GT
Lominadze
JG