On Structured Lyapunov Functions and Dissipativity in Interconnected LTI Systems
Abstract
In this paper we study connections between structured storage or Lyapunov functions of a class of interconnected systems (dynamical networks) and dissipativity properties of the individual systems. We prove that if a dynamical network, composed as a set of linear time invariant (LTI) systems interconnected over an acyclic graph, admits an additive quadratic Lyapunov function, then the individual systems in the network are dissipative with respect to a (nonempty) set of interconnection neutral supply functions. Each supply function from this set is defined on a single interconnection link in the network. Specific characterizations of neutral supply functions are presented which imply robustness of network stability/dissiptivity to removal of interconnection links.
Cite
@article{arxiv.1905.05854,
title = {On Structured Lyapunov Functions and Dissipativity in Interconnected LTI Systems},
author = {Andrej Jokić and Ivica Nakić},
journal= {arXiv preprint arXiv:1905.05854},
year = {2019}
}