Positive Forms and Stability of Linear Time-Delay Systems

Details Positive Forms and Stability of Linear Time-Delay Systems Positive Forms and Stability of Linear Time-Delay Systems

2007-07-02

arxiv.org/abs/0707.0230v1

Mathematics

Dynamical Systems

journal version, 14 pages

Scientific paper

We consider the problem of constructing Lyapunov functions for linear differential equations with delays. For such systems it is known that exponential stability implies the existence of a positive Lyapunov function which is quadratic on the space of continuous functions. We give an explicit parametrization of a sequence of finite-dimensional subsets of the cone of positive Lyapunov functions using positive semidefinite matrices. This allows stability analysis of linear time-delay systems to be formulated as a semidefinite program.

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