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German
Input-to-state stability of exponentially stabilized semilinear control systems with inhomogeneous perturbations
L. Grüne:
Input-to-state stability of exponentially stabilized semilinear control systems with inhomogeneous perturbations
Systems & Control Letters
38,
27 - 35,
1999
Smart-Link:
http://www.elsevier.com/locate/sysconle
DOI:
10.1016/S0167-6911(99)00044-4
Keywords: Input-to-state stability; stabilizing feedback control; robustness
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Abstract:
In this paper we investigate the robustness of state feedback stabilized semilinear systems subject to inhomogeneous perturbations in terms of input-to-state stability. We consider a general class of exponentially stabilizing feedback controls which covers sampled discrete feedbacks and discontinuous mappings as well as classical feedbacks and derive a necessary and sufficient condition for the corresponding closed loop systems to be input-to-state stable with exponential decay and linear dependence on the perturbation. This condition is easy to check and admits a precise estimate for the constants involved in the input-to-state stability formulation. Applying this result to an optimal control based discrete feedback yields an equivalence between (open loop) asymptotic null controllability and robust input-to-state (state feedback) stabilizability.