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Bifurcations of a generalized van der Pol oscillator with strong nonlinearity

✍ Scribed by Jiashi Tang; Jinqi Qin; Han Xiao


Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
228 KB
Volume
306
Category
Article
ISSN
0022-460X

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✦ Synopsis


A generalized van der Pol oscillator with parametric excitation is studied for its bifurcation. On the basis of the MLP method, we enable a strongly nonlinear system to be transformed into a small parameter system. The bifurcation response equation of a 1/2 subharmonic resonance system is determined by the multiple scales method. According to the singularity theory, the bifurcation of equilibrium points is analyzed. The stability of the zero solution is researched by the eigenvalues of the variational matrix and the bifurcation sets are constructed in various regions of the parameter plane.


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The trivial equilibrium of a van der Pol-Duffing oscillator with a nonlinear feedback control may lose its stability via Hopf bifurcations, when the time delay involved in the feedback control reaches certain values. Nonresonant Hopf-Hopf interactions may occur in the controlled van der Pol-Duffing