Abstract
We consider robust optimization for time-varying systems in terms of perturbations of fractional representations. Upper and lower bounds are given for the maximal radius of the operator ball around a given plant which can be stabilized by a single compensator. In the time-invariant case, these numbers are equal.
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Feintuch, A. Robustness for time-varying systems. Math. Control Signal Systems 6, 247–263 (1993). https://doi.org/10.1007/BF01211622
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DOI: https://doi.org/10.1007/BF01211622