Journal
ENGINEERING WITH COMPUTERS
Volume 31, Issue 4, Pages 749-762Publisher
SPRINGER
DOI: 10.1007/s00366-014-0386-6
Keywords
Finding periodic orbits; Levenberg-Marquardt algorithm; Least-squares estimation of nonlinear parameters; Rossler system; Flexible rotor-bearing system
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An alternative numerical method is developed to find stable and unstable periodic orbits of nonlinear dynamical systems. The method exploits the high efficiency of the Levenberg-Marquardt algorithm for medium-sized problems and has the additional advantage of being relatively simple to implement. It is also applicable to both autonomous and non-autonomous systems. As an example of its use, it is employed to find periodic orbits in the Rossler system, a coupled Rossler system, as well as an eight-dimensional model of a flexible rotor-bearing; problems which have been treated previously via two related methods. The results agree with the previous methods and are seen to be more accurate in some cases. A simple implementation of the method, written in the Python programming language, is provided as an Appendix.
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