Abstract
Through both analytical and numerical approaches, stability and bifurcation dynamics are studied for a nonlinear controlled system subjected to parametric excitation. The controlled system is a typical case of a two-degree-of-freedom system composed of a parametrically excited pendulum and its driving device. Three types of critical points for the modulation equations are considered near the principle resonance and internal resonance, which are characterized by a double zero and two negative eigenvalues, a double zero and a pair of purely imaginary eigenvalues, and two pairs of purely imaginary eigenvalues, respectively. With the aid of normal form theory, the stability regions for the initial equilibrium solutions and the critical bifurcation curves are obtained analytically, which exhibit some new dynamical behaviors. A time integration scheme is used to find the numerical solutions for these bifurcations cases, which confirm these analytical predictions.
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Acknowledgements
The authors greatly appreciate the anonymous reviews for their insightful comments and suggestions for further improving the quality of this work. This research was supported by National Natural Science Foundation of China (11602134, 11501055), Natural Science Foundation of Shanghai (16ZR1413700), Natural Science Foundation of Shanghai University of Engineering Science (nhrc-2015-06) and National Research Foundation for the Doctoral Program of Higher Education of China (20133218110025).
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Yu, W., Chen, F., Li, N. et al. Stability and bifurcation dynamics for a nonlinear controlled system subjected to parametric excitation. Arch Appl Mech 87, 479–487 (2017). https://doi.org/10.1007/s00419-016-1205-x
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DOI: https://doi.org/10.1007/s00419-016-1205-x