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Stability and Control of Large-Scale Dynamical SystemsA Vector Dissipative Systems Approach$
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Wassim M. Haddad and Sergey G. Nersesov

Print publication date: 2011

Print ISBN-13: 9780691153469

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691153469.001.0001

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Stability Theory via Vector Lyapunov Functions

Stability Theory via Vector Lyapunov Functions

(p.9) Chapter Two Stability Theory via Vector Lyapunov Functions
Stability and Control of Large-Scale Dynamical Systems

Wassim M. Haddad

Sergey G. Nersesov

Princeton University Press

This chapter describes a fundamental stability theory for nonlinear dynamical systems using vector Lyapunov functions. It first introduces the notation and definitions before developing stability theorems via vector Lyapunov functions for continuous-time and discrete-time nonlinear dynamical systems. It then extends the theory of vector Lyapunov functions by constructing a generalized comparison system whose vector field can be a function of the comparison system states as well as the nonlinear dynamical system states. It also presents a generalized convergence result which, in the case of a scalar comparison system, specializes to the classical Krasovskii–LaSalle theorem. In the analysis of large-scale nonlinear interconnected dynamical systems, several Lyapunov functions arise naturally from the stability properties of each individual subsystem.

Keywords:   stability theory, nonlinear dynamical system, vector Lyapunov function, comparison system, vector field, convergence, Krasovskii–LaSalle theorem, interconnected dynamical system

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