Abstract
In this paper, the bifurcation dynamics of a family of \((n_{1},1,n_{2})\)-periodic motions to chaos with infinite homoclinic orbits \((\min{\{n_{1},n_{2}\}}=1\), \(\max{\{n_{1},n_{2}}\}=1,2,{\ldots},)\) in the Lorenz system is studied through the discrete mapping method. The bifurcation trees of \((n_{1},1,n_{2})\)-periodic motion to chaos are presented through discrete nodes and harmonic amplitudes. The stability and bifurcations of periodic motions are determined through eigenvalue analysis. The bifurcation scenarios of \((n_{1},1,n_{2})\)-period-1 motions to chaos are similar each other. The critical values for existence of \((n_{1},1,n_{2})\)-related periodic motions are determined for saddle-node and period-doubling bifurcations. The homoclinic orbits are associated with unstable periodic motions on the bifurcation trees of the \((n_{1},1,n_{2})\)-periodic motions to chaos. The homoclinic obits and periodic motions are illustrated from the bifurcation trees of the \((n_{1},1,n_{2})\)-periodic motions to chaos. The numerical and analytical trajectories of unstable periodic motions were presented for comparison. If the numerical simulations did not have any computational errors, the numerical and analytical solutions of unstable periodic motions in the Lorenz system should be identical. Thus, one observed so-called strange attractors in the Lorenz system through numerical simulations, which are not real strange attractors. This paper is specially dedicated to the good friend and colleague in memory of Gennady A. Leonov for his contributions on nonlinear dynamics.
Similar content being viewed by others
REFERENCES
S. Guo and A. C. J. Luo, ‘‘On infinite homoclinic orbits induced by unstable periodic orbits in the Lorenz system,’’ Chaos 31, 043106 (2021).
S. Guo and A. C. J. Luo, ‘‘Bifurcation trees of (1:2)-asymmetric periodic motions with corresponding infinite homoclinic orbits in the Lorenz system,’’ J. Vibrat. Test. Syst. Dyn. 5, 373–406 (2021).
E. N. Lorenz, ‘‘Deterministic nonperiodic flow,’’ J. Atmos. Sci. 20, 130–141 (1963).
J. H. Curry, ‘‘A generalized Lorenz system,’’ Commun. Math. Phys. 60, 193–204 (1978).
W. Tucker, ‘‘The Lorenz attractor exists,’’ C.R. Acad. Sci., Ser. I: Math. 328, 1197–1202 (1999).
L. P. Shilnikov, ‘‘On a Poincaré–Birkhoff problem,’’ Mat. Sb. 116, 378–397 (1967).
S. P. Hastings and W. C. Troy, ‘‘A proof that the Lorenz equations have a homoclinic orbit,’’ J. Differ. Equat. 113, 166–188 (1994).
N. K. Gavrilov and L. P. Shilnikov, ‘‘On three-dimensional dynamical systems close to systems with a structurally unstable homoclinic curve. II,’’ Mat. Sb. 90, 139–156 (1973).
V. S. Afraimovich, V. V. Bykov, and L. P. Shilnikov, ‘‘Origin and structure of the Lorenz attractor,’’ Dokl. Akad. Nauk SSSR 234, 336–339 (1977).
D. Rand, ‘‘The topological classification of Lorenz attractors,’’ Math. Proc. Cambridge Phil. Soc. 83, 451–460 (1978).
J. Guckenheimer and R. F. Williams, ‘‘Structural stability of Lorenz attractors,’’ Publ. Math. Inst. Hautes Etudes Sci. 50, 59–72 (1979).
R. F. Williams, ‘‘The structure of Lorenz attractors,’’ Publ. Math. Inst. Hautes Etudes Sci. 50, 73–99 (1979).
K. A. Robbins, ‘‘Periodic solutions and bifurcation structure at high R in the Lorenz model,’’ SIAM J. Appl. Math. 36, 457–472 (1979).
D. V. Lyubimov and M. A. Zaks, ‘‘Two mechanisms of the transition to chaos in finite-dimensional models of convection,’’ Phys. D (Amsterdam, Neth.) 9, 52–64 (1983).
J. Frøyland and K. H. Alfsen, ‘‘Lyapunov-exponent spectra for the Lorenz model,’’ Phys. Rev. A 29, 2928–2931 (1984).
T. Shimizu and N. Morioka, ‘‘Chaos and limit cycles in the Lorenz model,’’ Phys. Lett. A 66, 182–184 (1978).
J. L. Kaplan and J. A. Yorke, ‘‘Preturbulence: A regime observed in a fluid flow model of Lorenz,’’ Commun. Math. Phys. 67 (2), 93–108 (1979).
E. A. Jackson, ‘‘The Lorenz system: I. The global structure of its stable manifolds,’’ Phys. Scr. 32, 469–475 (1985).
E. A. Jackson, ‘‘The Lorenz system: II. The homoclinic convolution of the stable manifolds,’’ Phys. Scr. 32, 476–481 (1985).
J. A. Yorke and E. D. Yorke, ‘‘Metastable chaos: The transition to sustained chaotic behavior in the Lorenz model,’’ J. Stat. Phys. 21, 263–277 (1979).
C. Sparrow, ‘‘An introduction to the Lorenz equations,’’ IEEE Trans. Circuits Syst. 30, 533–542 (1983).
A. F. Vakakis and M. F. A. Azeez, ‘‘Analytic approximation of the homoclinic orbits of the Lorenz system at \(\sigma=10\), \(b=8/3\) and \(\rho=13.926\),’’ Nonlin. Dyn. 15, 245–257 (1998).
G. A. Leonov, ‘‘Estimation of loop-bifurcation parameters for a saddle-point separatrix of a Lorenz system,’’ Differ. Equat. 24, 634–638 (1988).
G. A. Leonov, ‘‘On homoclinic bifurcation in the Lorenz system,’’ Vestn. SPb. Univ., Math. 32 (1), 13–15 (1999).
G. A. Leonov, ‘‘Bounds for attractors and the existence of homoclinic orbits in the Lorenz system,’’ J. Appl. Math. Mech. 65, 19–32 (2001).
G. A. Leonov, ‘‘The Tricomi problem on the existence of homoclinic orbits in dissipative systems,’’ J. Appl. Math. Mech. 77, 296–304 (2013).
P. Saha, D. C. Saha, A. Ray, and A. R. Chowdhury, ‘‘On some properties of memristive Lorenz equation–theory and experiment,’’ J. Appl. Nonlin. Dyn. 7, 413–423 (2018).
X. Liu and L. Hong, ‘‘The adaptive synchronization of the stochastic fractional-order complex Lorenz system,’’ J. Appl. Nonlin. Dyn. 4, 267–279 (2015).
S. S. Hassan, ‘‘Computational complex dynamics of the discrete Lorenz system,’’ J. Appl. Nonlin. Dyn. 8, 345–366 (2016).
A. C. J. Luo, Discretization and Implicit Mapping Dynamics (Springer, Berlin, 2015).
A. C. J. Luo, ‘‘Periodic flows to chaos based on discrete implicit mappings of continuous nonlinear systems,’’ Int. J. Bifurc. Chaos 25, 1550044 (2015).
Y. Guo and A. C. J. Luo, ‘‘On complex periodic motions and bifurcations in a periodically forced, damped, hardening Duffing oscillator,’’ Chaos, Solitons Fractals 81, 378–399 (2015).
A. C. J. Luo and S. Xing, ‘‘Analytical predictions of period-1 motions to chaos in a periodically driven quadratic nonlinear oscillator with a time-delay,’’ Math. Model. Nat. Phenom. 11 (2), 75–88 (2016).
Y. Xu, Z. Chen, and A. C. J. Luo, ‘‘An independent period-3 motion to chaos in a nonlinear flexible rotor system,’’ Int. J. Dyn. Control 8, 337–351 (2020).
C. Guo and A. C. J. Luo, ‘‘Period-3 motions to chaos in an inverted pendulum with a periodic base movement,’’ Int. J. Dyn. Control 10, 663–680 (2021).
A. N. Pchelintsev, ‘‘Numerical and physical modeling of the dynamics of the Lorenz system,’’ Numer. Anal. Appl. 7, 159–167 (2014).
A. N. Pchelintsev, ‘‘An accurate numerical method and algorithm for constructing solutions of chaotic systems,’’ J. Appl. Nonlin. Dyn. 9, 207–211 (2020).
A. N. Pchelintsev, ‘‘A numerical-analytical method for constructing periodic solutions of the Lorenz system,’’ Differ. Equat. Control Proces. 2020 (4), 59–76 (2020).
A. C. J. Luo, Toward Analytical Chaos in Nonlinear Systems (Wiley, New York, 2013).
A. C. J. Luo, Continuous Dynamical Systems (HEP/L&H Scientific, Beijing/Glen Carbon, 2012).
Author information
Authors and Affiliations
Corresponding author
Additional information
(Submitted by S. Yu. Pilyugin)
Appendix
Appendix
From Eqs. (4) and (5), the partial derivative matrices for the mapping \(P_{k}(k=1,2,\cdots,mN)\) are
Substitution of Eq. (A.1) into Eq. (10) yields the corresponding Jacobian matrix, i.e.,
where
and
The expressions of mid points \(\bar{x}_{1,k}\), \(\bar{x}_{2,k}\) and \(\bar{x}_{3,k}\) are given in Eq. (2).
Rights and permissions
About this article
Cite this article
Guo, S., Luo, A.C. A Family of Periodic Motions to Chaos with Infinite Homoclinic Orbits in the Lorenz System. Lobachevskii J Math 42, 3382–3437 (2021). https://doi.org/10.1134/S1995080222020093
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1995080222020093