Providing a Basin of Attraction to a Target Region of Polynomial Systems by Computation of Lyapunov-Like Functions

  • Authors:
  • Stefan Ratschan;Zhikun She

  • Affiliations:
  • stefan.ratschan@cs.cas.cz;zhikun.she@buaa.edu.cn

  • Venue:
  • SIAM Journal on Control and Optimization
  • Year:
  • 2010

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Abstract

In this paper, we present a method for computing a basin of attraction to a target region for polynomial ordinary differential equations. This basin of attraction is ensured by a Lyapunov-like polynomial function that we compute using an interval based branch-and-relax algorithm. This algorithm relaxes the necessary conditions on the coefficients of the Lyapunov-like function to a system of linear interval inequalities that can then be solved exactly. It iteratively refines these relaxations in order to ensure that, whenever a nondegenerate solution exists, it will eventually be found by the algorithm. Application of an implementation to a range of benchmark problems shows the usefulness of the approach.