Open AccessHopf bifurcation from synchronous chaos and its circuit simulation in a coupled nonlinear oscillator system
Author(s) -
Ma Wen-Qi,
Chengwu Yang
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.1064
Subject(s) - hopf bifurcation , physics , lyapunov exponent , biological applications of bifurcation theory , nonlinear system , bifurcation diagram , pitchfork bifurcation , bifurcation , saddle node bifurcation , oscillation (cell signaling) , mathematical analysis , period doubling bifurcation , classical mechanics , mathematics , quantum mechanics , biology , genetics
For a coupled nonlinear oscillator system with diffusion and gradient couplings, spatial Fourier transformation is performed and the dynamic equations of various space modes are derived. By calculating the Lyapunov exponents of the transverse modes, one can determine the stable region of the synchronous chaos on the plane of coupling parameters. On the boundary of the stable region, a couple of conjugate transverse modes destabilize, and a Hopf bifurcation takes place. Numerical simulations are carried out for the coupled Lorenz oscillator system. An electronic circuit is designed for simulating the bifurcation in the system. Results from the simulations show that the frequency created by the Hopf bifurcation is equal to the oscillation frequency of the destabilized transverse modes.