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Szumiński, Wojciech, 2024, "Source data for: A new model of variable-length coupled pendulums – from hyperchaos to superintegrability", https://doi.org/10.18150/SG2GSY, RepOD, V2
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This paper studies the dynamics and integrability of a variable-length coupled pendulum system.
The complexity of the model is presented by joining various numerical methods, such as the Poincar\'e cross-sections, phase-parametric diagrams, and Lyapunov exponents spectra. We show that the presented model is hyperchaotic, which ensures its nonintegrability. We gave analytical proof of this fact analyzing properties of the differential Galois group of variational equations along certain particular solutions of the system. We employ the Kovacic algorithm and its extension to dimension four to analyze the differential Galois group.
Amazingly enough, in the absence of the gravitational potential and for certain values of the parameters, the system can exhibit chaotic, integrable, as well as superintegrable dynamics. To the best of our knowledge, this is the first attempt to use the method of Lyapunov exponents in the systematic search for the first integrals of the system. We show how to effectively apply the Lyapunov exponents as an indicator of integrable dynamics. The explicit forms of integrable and superintegrable systems are given.
Nonlinear Dynamics, Chaos, Integrability, Pendulum systems
W. Szumiński, A new model of variable-length coupled pendulums – from hyperchaos to superintegrability. https://doi.org/10.1007/s11071-023-09253-5 https://doi.org/10.1007/s11071-023-09253-5 doi: https://doi.org/10.1007/s11071-023-09253-5
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