Gain preserving Lyapunov functions for perturbed and controlled systems

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Grüne, Lars:
Gain preserving Lyapunov functions for perturbed and controlled systems.
Bayreuth , 2002

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Abstract

Lyapunov functions are an important tool for stability analysis and stabilization of nonlinear systems. They are useful in many ways, e.g., for the design of (robustly) stabilizing feedback laws, for the analysis of the system's behavior and, last but not least, as a technical tool for many proofs involving stability properties of nonlinear systems. In this paper we give Lyapunov function characterizations for suitable variants of the input-to-state stability property, which do not only imply the qualitative properties but also represent the robustness gains and attraction rates. Using techniques from nonsmooth analysis and viscosity solutions of first order PDEs we are in particular able to formulate Hamilton-Jacobi type inequalities which characterize the respective properties.