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Published August 31, 2006 | public
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H∞ Control of Nonlinear Systems: A Convex Characterization


The so-called nonlinear H∞-control problem in state space is considered with an emphasis on developing machinery with promising computational properties. Both state feedback and output feedback H∞-control problems for a class of nonlinear systems are characterized in terms of continuous positive definite solutions of algebraic nonlinear matrix inequalities which are convex feasibility problems. The issue of existence of solutions to these nonlinear matrix inequalities (NLMIs) is justified.

Additional Information

The authors would like to thank David Gabai, Professor of Mathematics at Caltech, for helpful discussion and clarifying some differential geometrical concepts. Support for this work was provided by NSF, AFOSR, and ONR.

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August 20, 2023
September 8, 2023