**Volume 17, Issue 3, pp 408-419**

**Publication Date**: 2017-07-23

http://dx.doi.org/10.22436/jmcs.017.03.06

Dandan Xie - School of Mathematics and Statistics, Linyi University, Linyi, Shandong, 276005, P. R. China.

Yinlai Jin - School of Mathematics and Statistics, Linyi University, Linyi, Shandong, 276005, P. R. China.

Feng Li - School of Mathematics and Statistics, Linyi University, Linyi, Shandong, 276005, P. R. China.

Nana Zhang - School of Mathematics and Statistics, Shandong Normal University, Jinan, Shandong, 250014, P. R. China.

In this paper, perturbed polynomial Moon-Rand systems are considered. The Pad´e approximant and analytic solution in the neighborhood of the initial value are introduced into the process of constructing the Shilnikov type homoclinic orbits for three dimensional nonlinear dynamical systems. In order to get real bifurcation parameters, four undetermined coefficients are introduced including three initial values about position and the value of bifurcation parameter. By the eigenvectors of its all eigenvalues, the value of the bifurcation parameter and three initial values about position are obtained directly. And, the analytical expressions of the Shilnikov type homoclinic orbits are achieved and the deletion errors relative to the practical system are given. In the end, we roughly predict when the horseshoe chaos occurs.

Pad´e approximant, analytic solution, Shilnikov theorem, homoclinic orbit.

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