Regular and Chaotic Transition to Synchrony in a Star Configuration of Phase Oscillators

  • Vladimir N. Belykh
  • Maxim I. Bolotov
  • Grigory V. Osipov
Part of the Nonlinear Systems and Complexity book series (NSCH, volume 20)


We consider two finite-dimensional models of the phase oscillators in the case of star configuration of coupling. Both systems of equations are reduced to a nonlinearly coupled system of pendulum equations. We prove that the transition from synchronous to asynchronous oscillations occurs via bifurcation of saddle-node equilibrium. In this connection the asynchronous regime can be partially synchronous rotations. We find that the reverse transition from asynchronous to synchronous regime occurs via bifurcation of homoclinic orbit both of the saddle equilibrium point and of the saddle periodic orbit. In the case of homoclinic loop of the saddle point the synchrony appears only from asynchronous mode without partially synchronized rotations. In the case of the homoclinic curve of the saddle periodic orbit the system undergoes a chaotic rotation regime which results in a random return to synchrony.


Phase oscillators Synchronization Star coupling Homoclinic loop 



This work was supported by the RSF (Project No. 14-12-00811) (Sections 1, 2) and by the RFBR (project 15-01-08776) (Section 3).


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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • Vladimir N. Belykh
    • 1
  • Maxim I. Bolotov
    • 2
  • Grigory V. Osipov
    • 2
  1. 1.Volga State University of Water TransportNizhny NovgorodRussia
  2. 2.Nizhny Novgorod UniversityNizhny NovgorodRussia

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