Nonlinear Dynamics and Chaos
Nonlinear Dynamics and Chaos
2nd Edition
ISBN: 9780813349107
Author: Steven H. Strogatz
Publisher: PERSEUS D
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Chapter 8.6, Problem 9E
Interpretation Introduction

Interpretation:

To analyse the Japanese tree frog system and:

  • (a) To write the system in terms of the phase differences.

  • (b) To show that the experimental result is consistent with the interaction function H(x)= a sin(x), but this cannot account for the three frog system.

  • (c) To show that the more complicated form of the interaction function H(x)= a sin(x)+ b sin(2x) is obeyed by the three frog system.

  • To plot the phase portraits of the three frog system in terms of the phase differences and explain the experimental results in two or three systems for the various parameter values.

  • (e) To show that adding a small, even periodic component to H does not alter the result qualitatively.

Concept Introduction:

  • ➢ The fixed point of a differential equation is the point where, f(x*) = 0 ; while substitution f(x*) = x˙ is used and x&*#x00A0;is a fixed point.

  • ➢ The phase portraits represent the trajectories of the system with respect to the parameters and give a qualitative idea about the evolution of the system, its fixed points, whether they will attract or repel the flow, etc.

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