Abstract
This paper applies a recent result on nonlinear H ∞-optimal control to give a necessary and sufficient condition for the existence of a state feedback controller which absolutely stabilizes a discrete-time uncertain nonlinear system with structured uncertainty. The class of uncertain systems being considered contain uncertainties which satisfy a certain sum constraint. This sum constraint is a nonlinear discrete-time version of the integral quadratic constraint uncertainty description. The main result is established by using a nonlinear S-procedure result, which enables the robust absolute stabilization problem to be converted into a equivalent nonlinear H∞-optimal control problem.
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Savkin, A.V., Petersen, I.R. Robust Stabilization of Discrete-Time Uncertain Nonlinear Systems. Journal of Optimization Theory and Applications 96, 87–107 (1998). https://doi.org/10.1023/A:1022611116645
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DOI: https://doi.org/10.1023/A:1022611116645