A fast sampling method for estimating the domain of attraction

Esmaeil Najafi*, R. Babuska, G.A. Delgado Lopes

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    43 Citations (Scopus)
    69 Downloads (Pure)

    Abstract

    Most stabilizing controllers designed for nonlinear systems are valid only within a specific region of the state space, called the domain of attraction (DoA). Computation of the DoA is usually costly and time-consuming. This paper proposes a computationally effective sampling approach to estimate the DoAs of nonlinear systems in real time. This method is validated to approximate the DoAs of stable equilibria in several nonlinear systems. In addition, it is implemented for the passivity-based learning controller designed for a second-order dynamical system. Simulation and experimental results show that, in all cases studied, the proposed sampling technique quickly estimates the DoAs, corroborating its suitability for real-time applications.

    Original languageEnglish
    Pages (from-to)823-834
    JournalNonlinear Dynamics: an international journal of nonlinear dynamics and chaos in engineering systems
    Volume86
    Issue number2
    DOIs
    Publication statusPublished - 2016

    Keywords

    • Domain of attraction
    • Lyapunov function
    • Optimization
    • Sampling method

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